CN103697509A - Low noise range hood blower fan spiral case - Google Patents
Low noise range hood blower fan spiral case Download PDFInfo
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- CN103697509A CN103697509A CN201310528902.8A CN201310528902A CN103697509A CN 103697509 A CN103697509 A CN 103697509A CN 201310528902 A CN201310528902 A CN 201310528902A CN 103697509 A CN103697509 A CN 103697509A
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Abstract
The invention relates to a low noise range hood blower fan spiral case, which comprises a housing (1) with an air inlet (21, 31) and an air outlet (1), and the air outlet (11) is located at the upper part of the housing (1), and the housing (1) comprises a front shroud (2), a rear shroud (3) and an annular wall (4) connecting the two shrouds; the invention is characterized in that: at least one lower part of the shroud between the front shroud (2) and the rear shroud (3) is a connection inclined plane (22, 32), and the connection inclined plane (22, 32) connects the annular wall (4), and the connection inclined plane (22, 32) inclines downward and inward gradually from up to bottom. Because the connection bevelling surface is added at the spiral case, the air current channel at the place is narrower, thereby the air pressure at the place is substantially increased, and the resisting power of pressure pulsation is enhanced for counteracting most pressure pulsation, and further transmission of pressure pulsation in pipe network to the tongue of the spiral case is avoided, and air flow state at the tongue of the spiral case is improved; the test proves that the spiral case structure can effectively reduce noise at real usage environment.
Description
Technical field
The present invention relates to a kind of range hood contents, relate in particular to a kind of low-noise cooker hood spiral case.
Background technology
The range hood that adopts centrifugal blower with its relative suction compared with large, noise compared with low and well received, in any case yet noise still exists, noise is generally from two aspects, the one, the noise of blower fan itself, the 2nd, the noise that air-flow moves and sends because of turbulization in volute of blower.Volute of blower is one of main member of range hood inside, volute of blower comprises the two ring-type middle casing of front shroud, back shroud and connection, middle casing is all vertical with front shroud, back shroud, on front shroud, have air inlet, on back shroud, be provided with motor, impeller is between front/rear cover plate.
As the patent No. two air-inlet range hood > > of Chinese utility model patent < < that are ZL200420082377.8, the patent No. is the blower volute structure > > of the European type cooker hood that the blower volute structure > > of the double-faced ventilated European type cooker hood of Chinese utility model patent < < energy of CN200620103331.9 and Chinese utility model patent < < that the patent No. is CN200620103332.3 can be double-faced ventilated, they have all disclosed the worm frame of the range hood of similar structures.
In the performance standard of existing range hood, mainly measure range hood at air quantity, blast, the noise of laboratory conditions choosing, when user buys in market, the air quantity of experiencing, noise are also close to experimental state.Therefore general range hood designer, when design range hood performance, mainly be take laboratory test as base condition.But range hood is after being installed to user kitchen, because discharge flue is elongated, diminish, when multi-user uses range hood simultaneously, it is large that common flue internal resistance becomes, and it is large that range hood operating pressure becomes, rotating speed raises, and air quantity reduces, and noise is significantly greater than laboratory noise.The reason that noise raises is because range hood air fan delivery reduces, and blower fan operating point is close to blower fan pumping point, and manifold pressure pulsation is transmitted in volute of blower, and spiral case further amplifies this pressure fluctuation, produces strong noise.The middle casing of conventional volute is all vertical with front shroud, back shroud, this worm frame can not balance because fan delivery reduces, manifold pressure is stirred the pulsation bringing, therefore this spiral case is in actual use, noise is still larger.
Summary of the invention
Even if technical problem to be solved by this invention is to provide for above-mentioned prior art present situation under a kind of environment using in reality also can effectively reduce the low-noise cooker hood spiral case of noise.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of low-noise cooker hood spiral case, comprise the housing with air inlet and air outlet, air outlet is positioned at the top of housing, described housing comprises the two annular wall of front shroud, back shroud and connection, it is characterized in that: described front shroud with in back shroud, have the bottom of a cover plate at least for being connected inclined-plane, this connects inclined-plane and is connected with described annular wall, and described connection inclined-plane slopes inwardly from top to bottom gradually.
In said front-covering panel and back shroud, only have the bottom of front shroud to there is front connection inclined-plane.Certainly, also can only after having, the bottom of back shroud connect inclined-plane.The best is, the bottom of said front-covering panel has front connection inclined-plane, and meanwhile, the bottom of back shroud has rear connection inclined-plane.
Through evidence, the angle between above-mentioned front connection inclined-plane and front shroud be take 110 °～160 ° as good; Angle between described rear connection inclined-plane and back shroud be take 110 °～160 ° as good.This angle has better effect and reduces function of noise.
Above-mentioned air inlet has two, is respectively the air port of advancing being arranged on front shroud, and is arranged on the rear air outlet on back shroud.Two air inlets are set with respect to single air inlet, its incoming air area is larger, and mist extractor dose-effect fruit is better.
For convenience of spiral case is installed in range hood, the air outlet position place of above-mentioned housing is provided with outlet(discharge) flange, and described front shroud place is provided with two leg is installed.
Above-mentioned connection inclined-plane is the radian of outwardly convex bending.Connection inclined-plane is radian and is more conducive to circulation of air.
Compared with prior art, the invention has the advantages that: front shroud with in back shroud, have the bottom of a cover plate at least for being connected inclined-plane, this connects inclined-plane and is connected with annular wall, and connecting inclined-plane tilts towards enclosure interior from top to bottom, this connection inclined-plane tilts relative with air outlet, due to spiral case bottom, place has increased connection scarf, the air flow channel at this place is narrowed down, local speed air flow and the pressure increasing in spiral case, thereby this place's air pressure is significantly raise, at a particular design point, air velocity accelerates, strengthen the drag of pressure fluctuation, offset most of pressure fluctuation, avoid the pressure fluctuation in pipe network further to snail tongue place, to transmit, improve the air flow condition at snail tongue place, through evidence, under the environment that this worm frame is used in reality, also can effectively reduce noise.
Accompanying drawing explanation
Fig. 1 is the structural representation of first embodiment of the invention;
Fig. 2 is the right view of Fig. 1;
Fig. 3 is the left view of Fig. 1;
Fig. 4 is the structural representation of second embodiment of the invention;
Fig. 5 is the right view of Fig. 4;
Fig. 6 is the left view of Fig. 4.
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
As shown in Figures 1 to 3, be first preferred embodiment of the present invention.
A kind of low-noise cooker hood spiral case, comprise the housing 1 with air inlet and air outlet 11, air outlet 11 is positioned at the top of housing 1, air outlet 11 positions of housing 1 are provided with outlet(discharge) flange 12, housing 1 comprises front shroud 2, back shroud 3 and is connected the annular wall 4 of the two, the cavity that front shroud 2, back shroud 3 and annular wall 4 surround forms the passage of circulation of air, and front shroud 2 places are provided with two leg 23 is installed.Air inlet has two, is respectively the air port 21 of advancing being arranged on front shroud 2, and is arranged on the rear air outlet 31 on back shroud 3.
In front shroud 2 and back shroud 3, only have the bottom of front shroud 2 to there is front connection inclined-plane 22, this front connection inclined-plane 22 is connected with annular wall 4, front connection inclined-plane 22 tilts relative with air outlet 11, connected mode can be with reference to prior art, front connection inclined-plane 22 is from top to bottom towards sloping inwardly gradually, and the inward direction on front connection inclined-plane 22 is the direction towards back shroud 3.Angle α between front connection inclined-plane 22 and front shroud 2 is 110 °～160 °.
Front connection inclined-plane 22 and rear connection inclined-plane 32 can be the radian of certain outwardly convex bending.
As shown in Fig. 4～6, be second embodiment of the present invention.
The difference of the present embodiment and first embodiment is: not only the bottom of aforementioned front shroud 2 has front connection inclined-plane 22, this front connection inclined-plane 22 is connected with annular wall 4, front connection inclined-plane 22 tilts relative with air outlet 11, front connection inclined-plane 22 is from top to bottom towards sloping inwardly downwards gradually, and the inward direction on front connection inclined-plane 22 is the direction towards back shroud 3.Meanwhile, the bottom of back shroud 3 has rear connection inclined-plane 32, and this rear connection inclined-plane 32 is connected with annular wall 4, and rear connection inclined-plane 32 is from top to bottom towards sloping inwardly downwards gradually, and the inward direction on rear connection inclined-plane 32 is the direction towards front shroud 2.Front connection inclined-plane 22 and rear connection inclined-plane 32 can be symmetrical arranged, and also can asymmetricly arrange.
Angle α between front connection inclined-plane 22 and front shroud 2 is 110 °～160 °; Angle β between described rear connection inclined-plane 22 and back shroud 3 is 110 °～160 °.
The whole ring section of spiral case in appended patent is designed to arc, be conducive to Air Flow, but principle is different from us, our patent is that plane or cambered surface are cut sth. askew in addition at spiral case path partially, speed air flow and pressure in part increases spiral case, with this, carry out the pressure fluctuation of balance pipe network, reduce noise.Core concept is to change the inner local circulation area of spiral case, then the processing of craftsmenship, at a particular design point, at utmost reduces noise.The not local circulation area that changes of annex patent, so thinking is different.
Claims (10)
1. a low-noise cooker hood spiral case, the housing (1) that comprises there is air inlet (21,31) and air outlet (11), air outlet (11) is positioned at the top of housing (1), described housing (1) comprises front shroud (2), back shroud (3) and is connected the annular wall (4) of the two, it is characterized in that: described front shroud (2) with in back shroud (3), have the bottom of a cover plate at least for being connected inclined-plane (22,32), this connects inclined-plane (22,32) and is connected with described annular wall (4), and described connection inclined-plane (22,32) slope inwardly from top to bottom gradually.
2. low-noise cooker hood spiral case according to claim 1, is characterized in that: in described front shroud (2) and back shroud (3), only have the bottom of front shroud (2) to have front connection inclined-plane (22).
3. low-noise cooker hood spiral case according to claim 2, is characterized in that: the angle (α) between described front connection inclined-plane (22) and front shroud (2) is 110 °～160 °.
4. low-noise cooker hood spiral case according to claim 1, is characterized in that: in described front shroud (2) and back shroud (3), only have the bottom of back shroud (3) to have rear connection inclined-plane (32).
5. low-noise cooker hood spiral case according to claim 4, is characterized in that: the angle (β) between described rear connection inclined-plane (22) and back shroud (3) is 110 °～160 °.
6. low-noise cooker hood spiral case according to claim 1, is characterized in that: the bottom of described front shroud (2) has front connection inclined-plane (22), and meanwhile, the bottom of back shroud (3) has rear connection inclined-plane (32).
7. low-noise cooker hood spiral case according to claim 6, is characterized in that: the angle (α) between described front connection inclined-plane (22) and front shroud (2) is 110 °～160 °; Angle (β) between described rear connection inclined-plane (22) and back shroud (3) is 110 °～160 °.
8. according to arbitrary described low-noise cooker hood spiral case in claim 1～7, it is characterized in that: described air inlet (21,31) has two, be respectively the air port of advancing (21) being arranged on front shroud (2), and be arranged on the rear air outlet (31) on back shroud (3).
9. low-noise cooker hood spiral case according to claim 8, it is characterized in that: air outlet (11) position of described housing (1) is provided with outlet(discharge) flange (12), described front shroud (2) is located to be provided with two leg (23) is installed.
10. low-noise cooker hood spiral case according to claim 1, is characterized in that: described connection inclined-plane (22,32) are the radian of outwardly convex bending.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310528902.8A CN103697509A (en) | 2013-10-31 | 2013-10-31 | Low noise range hood blower fan spiral case |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310528902.8A CN103697509A (en) | 2013-10-31 | 2013-10-31 | Low noise range hood blower fan spiral case |
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| Publication Number | Publication Date |
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| CN103697509A true CN103697509A (en) | 2014-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310528902.8A Pending CN103697509A (en) | 2013-10-31 | 2013-10-31 | Low noise range hood blower fan spiral case |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765404A (en) * | 2016-12-29 | 2017-05-31 | 宁波方太厨具有限公司 | A kind of range hood |
| CN106907748A (en) * | 2017-01-18 | 2017-06-30 | 广东美的厨房电器制造有限公司 | A kind of fan assembly and range hood |
| CN111486122A (en) * | 2020-04-23 | 2020-08-04 | 嵊州市浙江工业大学创新研究院 | Intelligent integrated kitchen surge monitoring protection system and method |
| CN113685373A (en) * | 2020-05-19 | 2021-11-23 | 宁波方太厨具有限公司 | Method for selecting air inlet ring of fan system |
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| CN1348065A (en) * | 2001-10-28 | 2002-05-08 | 宁波方太厨具有限公司 | Blower volute structure of top-sucking kitchen ventilator |
| CN201034091Y (en) * | 2007-04-30 | 2008-03-12 | 宁波方太厨具有限公司 | Fan housing of double air intake smoke exhaust ventilator |
| CN201628294U (en) * | 2010-01-23 | 2010-11-10 | 李振 | Split-type kitchen ventilator air cabinet with easy cleaning |
| CN102080840A (en) * | 2009-11-30 | 2011-06-01 | 博西华电器（江苏）有限公司 | Range hood |
| CN202883487U (en) * | 2012-09-29 | 2013-04-17 | 芜湖美的厨卫电器制造有限公司 | Volute and fan provided with volute and extractor hood |
| CN203731516U (en) * | 2013-10-31 | 2014-07-23 | 宁波方太厨具有限公司 | Low-noise air blower volute of extractor hood |
-
2013
- 2013-10-31 CN CN201310528902.8A patent/CN103697509A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1348065A (en) * | 2001-10-28 | 2002-05-08 | 宁波方太厨具有限公司 | Blower volute structure of top-sucking kitchen ventilator |
| CN201034091Y (en) * | 2007-04-30 | 2008-03-12 | 宁波方太厨具有限公司 | Fan housing of double air intake smoke exhaust ventilator |
| CN102080840A (en) * | 2009-11-30 | 2011-06-01 | 博西华电器（江苏）有限公司 | Range hood |
| CN201628294U (en) * | 2010-01-23 | 2010-11-10 | 李振 | Split-type kitchen ventilator air cabinet with easy cleaning |
| CN202883487U (en) * | 2012-09-29 | 2013-04-17 | 芜湖美的厨卫电器制造有限公司 | Volute and fan provided with volute and extractor hood |
| CN203731516U (en) * | 2013-10-31 | 2014-07-23 | 宁波方太厨具有限公司 | Low-noise air blower volute of extractor hood |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765404A (en) * | 2016-12-29 | 2017-05-31 | 宁波方太厨具有限公司 | A kind of range hood |
| CN106765404B (en) * | 2016-12-29 | 2022-10-21 | 宁波方太厨具有限公司 | Cooking fume exhauster |
| CN106907748A (en) * | 2017-01-18 | 2017-06-30 | 广东美的厨房电器制造有限公司 | A kind of fan assembly and range hood |
| CN106907748B (en) * | 2017-01-18 | 2019-03-22 | 广东美的厨房电器制造有限公司 | A kind of fan assembly and range hood |
| CN111486122A (en) * | 2020-04-23 | 2020-08-04 | 嵊州市浙江工业大学创新研究院 | Intelligent integrated kitchen surge monitoring protection system and method |
| CN111486122B (en) * | 2020-04-23 | 2024-03-19 | 嵊州市浙江工业大学创新研究院 | Intelligent integrated kitchen surge monitoring protection system and method |
| CN113685373A (en) * | 2020-05-19 | 2021-11-23 | 宁波方太厨具有限公司 | Method for selecting air inlet ring of fan system |
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Application publication date: 20140402 |