CN102767541B - A kind of noise reduction afflux circle and use the kitchen ventilator of this afflux circle - Google Patents
A kind of noise reduction afflux circle and use the kitchen ventilator of this afflux circle Download PDFInfo
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- CN102767541B CN102767541B CN201210230512.8A CN201210230512A CN102767541B CN 102767541 B CN102767541 B CN 102767541B CN 201210230512 A CN201210230512 A CN 201210230512A CN 102767541 B CN102767541 B CN 102767541B
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- spiral case
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- inner ring
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Abstract
The invention discloses a kind of noise reduction afflux circle, afflux circle is arranged on the air inlet of the spiral case of kitchen ventilator, afflux circle comprises outer ring, outer ring comprises the wind-guiding face that extended in spiral case by air inlet and is positioned at outer circumferential, wind-guiding face for the outer ring stationary plane fixing with spiral case, it is characterized in that, also comprise the inner ring be positioned at inside outer ring, inner ring comprises the isolation surface of turbulent area in the blocking-up spiral case that coordinates with wind-guiding face and is positioned at isolation surface outer circumferential for the inner ring stationary plane fixing with spiral case.Also disclose a kind of kitchen ventilator employing this afflux circle.Afflux circle adds an inner ring, has the isolation surface blocking turbulent area, can block and form turbulent area in spiral case, improves the air flowing in spiral case; Densely covered through hole or blind hole on isolation surface, make turbulent flow enter in cavity through multiple reflections sound energy consumption or the sound energy consumption that rubs in blind hole; Relatively only have one deck without the afflux circle of denoising structure, kitchen ventilator can reduce noise 1.0 ~ 1.5dB.
Description
Technical field
The present invention relates to a kind of afflux circle, especially a kind of noise reduction afflux circle, and use the kitchen ventilator of this noise reduction afflux circle.
Background technique
Household cooker hood utilizes centrifugal blower to realize extracting oil laden air out kitchen and being discharged into outside common flue or direct discharge chamber, because working environment wave range is too large, simultaneously NBS to the sign of noise only at laboratory environment, therefore kitchen ventilator centrifugal blower often designs according to laboratory environment when designing, afflux circle is used can effectively to improve centrifugal blower performance, at this moment centrifugal blower flow is comparatively large, and under being operated in design conditions condition, level of noise is lower.
Conventional afflux circle adopts steel plate punched to form, and is arranged on the air inlet of spiral case.And after kitchen ventilator is installed on user environment, day by day severe along with conditions of discharge, the working flow of centrifugal blower diminishes, and at this moment noise can obviously raise, and affects Consumer's Experience.See Fig. 1, it is exactly reduction along with blower fan working flow that noise becomes one of them large reason, after air-flow enters from afflux circle 1 ' front (airflow direction as shown by arrows), a turbulent area 2 ' is formed at afflux circle 1 ' inner side (side towards in spiral case), turbulent flow is exaggerated and flow to after in spiral case, then greatly can increase the noise of kitchen ventilator.
Summary of the invention
First technical problem to be solved by this invention is to provide one and improves air flowing in spiral case, reduces the kitchen ventilator noise reduction afflux circle of kitchen ventilator noise.
Second technical problem to be solved by this invention is to provide a kind of kitchen ventilator using above-mentioned afflux circle.
The present invention solves the technological scheme that above-mentioned first technical problem adopt: a kind of noise reduction afflux circle, described afflux circle is arranged on the air inlet of the spiral case of kitchen ventilator, described afflux circle comprises outer ring, described outer ring comprises the wind-guiding face that extended in described spiral case by described air inlet and is positioned at outer circumferential, described wind-guiding face for the outer ring stationary plane fixing with described spiral case, it is characterized in that, also comprise the inner ring be positioned at inside described outer ring, described inner ring comprises the isolation surface of turbulent area in the described spiral case of blocking-up that coordinates with described wind-guiding face and is positioned at described isolation surface outer circumferential for the inner ring stationary plane fixing with described spiral case.
According to an aspect of the present invention, described isolation surface circumference inner end and described wind-guiding face circumference inner end are fixed, the outer side surface of described inner ring stationary plane and described air inlet is fixed, described outer ring stationary plane is fixed on outside described inner ring stationary plane, forms cavity between described inner ring and outer ring.
Described isolation surface comprises blocking-up face, and the upper end in described blocking-up face is upwards bent to form vertical plane, and the upper end of described vertical plane bends outward towards spiral case and fixes with described wind-guiding face circumference inner end; The lower end in described blocking-up face is bent to form horizontal plane and fixes with the cylindrical form interior surface of described air inlet; Described inner ring stationary plane from described horizontal plane end to downward-extension.
Described spiral case is provided with impeller, described impeller has front circle, the lower end of described vertical plane is lower than the circumferential inner side edge edge of described Qian Quan corresponding part or flush with described circumferential inner side edge edge, both can stop the air-flow that enters from the air inlet of spiral case and enclose front side before impeller and form turbulent flow because air-flow that vane rotary produces mix, same also can stop before the air-flow of circle front side rotation generation leave this region and be mixed to form turbulent flow with the air-flow entered from intake grill.
Gather through hole in described blocking-up face, and the turbulent flow be blocked enters in cavity from through hole, through multiple reflections sound energy consumption in cavity inner wall, can strengthen anti-acoustic capability thus.
Preferably, described blocking-up face be in described spiral case from edge gradually centroclinal inclined-plane, towards the projecting inward cambered surface of described spiral case or the cambered surface protruded towards described spiral case, the effect blocking turbulent flow preferably can be had.
According to another aspect of the present invention, described outer ring and inner ring one-body molded, in solid between described outer ring and inner ring.
Described isolation surface comprises blocking-up face, and the upper end in described blocking-up face is upwards bent to form vertical plane, and described vertical plane upwards extends until arrive described wind-guiding face; The lower end in described blocking-up face is bent to form horizontal plane and fixes with the cylindrical form interior surface of described air inlet; Described inner ring stationary plane is with described outer ring stationary plane integral to downward-extension from described horizontal plane end.
Described spiral case is provided with impeller, described impeller has front circle, the lower end of described vertical plane is lower than the circumferential inner side edge edge of described Qian Quan corresponding part or flush with described circumferential inner side edge edge, both can stop the air-flow that enters from the air inlet of spiral case and enclose front side before impeller and form turbulent flow because air-flow that vane rotary produces mix, same also can stop before the air-flow of circle front side rotation generation leave this region and be mixed to form turbulent flow with the air-flow entered from intake grill.
Gather blind hole in described blocking-up face, and the turbulent flow be blocked enters in blind hole, and rub sound energy consumption in blind hole, also can strengthen anti-acoustic capability.
Preferably, described blocking-up face be in described spiral case from edge gradually centroclinal inclined-plane, towards the projecting inward cambered surface of described spiral case or the cambered surface protruded towards described spiral case, the effect blocking turbulent flow preferably can be had.
The present invention solves the technological scheme that above-mentioned second technical problem adopt, a kind of kitchen ventilator, comprise exhaust fume collecting hood, be arranged on the spiral case above described exhaust fume collecting hood, impeller is provided with in described spiral case, it is characterized in that, the air inlet of described spiral case arranges the above-mentioned afflux circle coaxial with described impeller.
Compared with prior art, the invention has the advantages that: on the basis of existing afflux circle, increase an inner ring, there is the isolation surface blocking turbulent area, coordinate with the wind-guiding face of outer ring, can block and form turbulent area in spiral case, improve the air flowing in spiral case, inner ring and outer ring can two-part fixing between form cavity, also can one-body molded between in solid; Densely covered through hole or blind hole on isolation surface, make turbulent flow enter in cavity through multiple reflections sound energy consumption or the sound energy consumption that rubs in blind hole; Relatively only have one deck without the afflux circle of denoising structure, the kitchen ventilator employing afflux circle of the present invention can reduce noise 1.0 ~ 1.5dB.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the afflux circle of prior art;
Fig. 2 is the schematic diagram of kitchen ventilator of the present invention;
Fig. 3 is the schematic diagram of afflux circle of the present invention;
Fig. 4 is the decomposition texture schematic diagram of afflux circle of the present invention;
Fig. 5 is spiral case sectional view of the present invention;
Fig. 6 is the close-up schematic view of Fig. 5.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
Embodiment 1
See Fig. 2, a kind of kitchen ventilator, comprises exhaust fume collecting hood 1, is arranged on the spiral case 2 above exhaust fume collecting hood 1, is provided with impeller 21 in spiral case 2, and impeller 21 has front circle 211 and rear circle 212, is fixed with blade 213 between front circle 211 and rear circle 212; Intake grill 22 place on front side of spiral case 2 is provided with the afflux circle 3 coaxial with impeller 21, is fixed with blower fan 23 on rear side of spiral case 2.When blower fan 23 impeller 21 rotates, air in spiral case 2 is discharged outside spiral case 2, negative pressure is formed in spiral case 2 inside, oil smoke is entered after in spiral case 2 from exhaust fume collecting hood 1 by afflux circle 3 under the effect of negative pressure, be discharged to outside common flue or discharge chamber under the effect of blower fan 23 and impeller 21, carry the direction of the air-flow of oil smoke secretly as shown by arrows.
See Fig. 3-Fig. 6, afflux circle 3 comprises inner ring 31 and outer ring 32, and inner ring 31 and outer ring 32 overlap, and wherein, inner ring 31 is inside spiral case 2, and outer ring 32 is away from inside spiral case 2.Outer ring 32 comprises the wind-guiding face 321 extended in spiral case 2 by the intake grill 22 of spiral case 2, and is positioned at outer circumferential, wind-guiding face 321 for the outer ring stationary plane 322 fixing with intake grill 22 place of spiral case 2.Inner ring 31 comprises the isolation surface 311 coordinated with the wind-guiding face 321 of outer ring 32, and be positioned at isolation surface 311 outer circumferential for the inner ring stationary plane 312 fixing with intake grill 22 place of spiral case 2, in the present embodiment, isolation surface 311 comprises blocking-up face 3111, blocking-up face 311 can be towards the tilted inclined-plane of spiral case 2, also can be towards the projecting inward cambered surface of spiral case 2 or towards the outer cambered surface protruded of spiral case 2; The upper end in blocking-up face 3111 is upwards bent to form vertical plane 3112, preferably, the lower end of vertical plane 3112 is lower than enclosing the circumferential inner side edge edge of 211 corresponding parts before impeller 21 or flushing with this inner side edge edge, both can stop that the air-flow that enters from intake grill 22 place of spiral case 2 mixed because impeller 21 rotates the air-flow produced and forms turbulent flow with enclosing before impeller 21 on front side of in the of 211, same also can stop before rotate generation on front side of circle 211 air-flow leave this region and be mixed to form turbulent flow with the air-flow entered from intake grill 22; The upper end of vertical plane 3112 bends towards the direction outside spiral case 2 thus fixes with the circumferential inner end in wind-guiding face 321; The lower end in blocking-up face 3111 is bent to form horizontal plane 3113, thus fix with the cylindrical form interior surface 221 at intake grill 22 place, inner ring stationary plane 312 from the end of horizontal plane 3113 to downward-extension, the outer side surface 222 vertical with intake grill 22 place is fixed, and outer ring stationary plane 322 is fixed on outside inner ring stationary plane 312, thus, cavity 4 is defined between isolation surface 311 and wind-guiding face 321.
Thus, when air-flow enters from intake grill 22, the turbulent flow of enclosing (side in spiral case 2) inside 211 end faces and afflux circle 3 before originally should being formed in is isolated by the isolation surface 311 of inner ring 31, block and form turbulent area in spiral case 2, the air flow condition in spiral case 2 can be improved thus, reach the object of noise reduction.
In order to strengthen the effect of noise reduction further, block micropore that face 3111 gathers, in the present embodiment, micropore is through hole 313, and through hole 313 can be circular, ellipse or the shape such as square.The turbulent flow be blocked enters in cavity 4 from through hole 313, through multiple reflections sound energy consumption in cavity 4 inwall, can strengthen anti-acoustic capability thus.
Embodiment 2
In another embodiment of the present invention, difference inner ring 31 and the outer ring 32 of itself and embodiment 1 are one-body molded, in solid between inner ring 31 and outer ring 32, the vertical plane 3112 of isolation surface 311 upwards extends until to wind-guiding face 321, inner ring stationary plane 312 and outer ring stationary plane 322 integral, now, the micropore gathered in the blocking-up face 3111 of the isolation surface 311 of inner ring 31 is blind hole, when air-flow enters from intake grill 22, isolation surface 311 blocks and form turbulent area in spiral case 2, and the turbulent flow be blocked enters in blind hole, rub sound energy consumption in blind hole, also anti-acoustic capability can be strengthened.
The foregoing is only the preferred embodiment of the present invention, it should be pointed out that for the ordinary skill in the art, not departing under principle prerequisite of the present invention, can also make various deformation and improvement, this also should be considered as protection scope of the present invention.
Claims (9)
1. a noise reduction afflux circle, described afflux circle is arranged on intake grill (22) place of the spiral case (2) of kitchen ventilator, described afflux circle comprises outer ring (32), described outer ring (32) comprises by the wind-guiding face (321) of described intake grill (22) extension in described spiral case (2) and is positioned at described wind-guiding face (321) outer circumferential for the outer ring stationary plane (322) fixing with described spiral case (2), it is characterized in that, also comprise the inner ring (31) being positioned at inner side, described outer ring (32), described inner ring (31) comprises the isolation surface (311) of the described spiral case of blocking-up (2) the interior turbulent area coordinated with described wind-guiding face (321) and is positioned at described isolation surface (311) outer circumferential for the inner ring stationary plane (312) fixing with described spiral case (2), described isolation surface (311) circumferential inner end and described wind-guiding face (321) circumferential inner end are fixed, described inner ring stationary plane (312) is fixed with the outer side surface (222) at described intake grill (22) place, described outer ring stationary plane (322) is fixed on described inner ring stationary plane (312) outside, forms cavity (4) between described inner ring (31) and outer ring (32), described isolation surface (311) comprises blocking-up face (3111), the upper end in described blocking-up face (3111) is upwards bent to form vertical plane (3112), and the upper end of described vertical plane (3112) bends outward towards spiral case (2) and fixes with the circumferential inner end of described wind-guiding face (321), the lower end in described blocking-up face (3111) is bent to form horizontal plane (3113) and fixes with the cylindrical form interior surface (221) at described intake grill (22) place, described inner ring stationary plane (312) from described horizontal plane (3113) end to downward-extension.
2. noise reduction afflux circle as claimed in claim 1, it is characterized in that, described spiral case (2) is provided with impeller (21), described impeller (21) has front circle (211), and the lower end of described vertical plane (3112) is lower than the circumferential inner side edge edge of described front circle (211) corresponding part or flush with described circumferential inner side edge edge.
3. noise reduction afflux circle as claimed in claim 1, it is characterized in that, described blocking-up face (3111) gather through hole (313).
4. the noise reduction afflux circle according to any one of claims 1 to 3, it is characterized in that, described blocking-up face (3111) be towards in described spiral case (2) from edge gradually centroclinal inclined-plane, towards the projecting inward cambered surface of described spiral case (2) or the cambered surface protruded towards described spiral case (2).
5. a noise reduction afflux circle, described afflux circle is arranged on intake grill (22) place of the spiral case (2) of kitchen ventilator, described afflux circle comprises outer ring (32), described outer ring (32) comprises by the wind-guiding face (321) of described intake grill (22) extension in described spiral case (2) and is positioned at described wind-guiding face (321) outer circumferential for the outer ring stationary plane (322) fixing with described spiral case (2), it is characterized in that, also comprise the inner ring (31) being positioned at inner side, described outer ring (32), described inner ring (31) comprises the isolation surface (311) of the described spiral case of blocking-up (2) the interior turbulent area coordinated with described wind-guiding face (321) and is positioned at described isolation surface (311) outer circumferential for the inner ring stationary plane (312) fixing with described spiral case (2), described outer ring (32) and inner ring (31) one-body molded, in solid between described outer ring (32) and inner ring (31), described isolation surface (311) comprises blocking-up face (3111), the upper end in described blocking-up face (3111) is upwards bent to form vertical plane (3112), and described vertical plane (3112) upwards extends until arrive described wind-guiding face (321), the lower end in described blocking-up face (3111) is bent to form horizontal plane (3113) and fixes with the cylindrical form interior surface (221) at described intake grill (22) place, described inner ring stationary plane (312) is integral with described outer ring stationary plane (322) to downward-extension from described horizontal plane (3113) end.
6. noise reduction afflux circle as claimed in claim 5, it is characterized in that, described spiral case (2) is provided with impeller (21), described impeller (21) has front circle (211), and the lower end of described vertical plane (3112) is lower than the circumferential inner side edge edge of described front circle (211) corresponding part or flush with described circumferential inner side edge edge.
7. noise reduction afflux circle as claimed in claim 5, is characterized in that, described blocking-up face (3111) gather blind hole.
8. the noise reduction afflux circle according to any one of claim 5 ~ 7, it is characterized in that, described blocking-up face (3111) be towards in described spiral case (2) from edge gradually centroclinal inclined-plane, towards the projecting inward cambered surface of described spiral case (2) or the cambered surface protruded towards described spiral case (2).
9. a kitchen ventilator, comprise exhaust fume collecting hood (1), be arranged on the spiral case (2) of described exhaust fume collecting hood (1) top, impeller (21) is provided with in described spiral case (2), it is characterized in that, intake grill (22) place of described spiral case (2) arranges the afflux circle (3) as claim 1 ~ 8 according to any one of coaxial with described impeller (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210230512.8A CN102767541B (en) | 2012-07-04 | 2012-07-04 | A kind of noise reduction afflux circle and use the kitchen ventilator of this afflux circle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210230512.8A CN102767541B (en) | 2012-07-04 | 2012-07-04 | A kind of noise reduction afflux circle and use the kitchen ventilator of this afflux circle |
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| Publication Number | Publication Date |
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| CN102767541A CN102767541A (en) | 2012-11-07 |
| CN102767541B true CN102767541B (en) | 2015-10-28 |
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| CN201210230512.8A Active CN102767541B (en) | 2012-07-04 | 2012-07-04 | A kind of noise reduction afflux circle and use the kitchen ventilator of this afflux circle |
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| CN105570201B (en) * | 2016-02-29 | 2019-03-05 | 宁波方太厨具有限公司 | A kind of noise reduction collector for centrifugal blower in range hood |
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| CN109595636B (en) * | 2017-09-30 | 2024-01-16 | 宁波方太厨具有限公司 | Near-suction type range hood |
| CN110345110B (en) * | 2018-04-03 | 2023-04-18 | 德昌电机(深圳)有限公司 | Silencer and ventilation fan applying same |
| CN108488103A (en) * | 2018-06-26 | 2018-09-04 | 杭州老板电器股份有限公司 | Denoising device, wind turbine and kitchen ventilator |
| CN111237249B (en) * | 2018-11-28 | 2021-01-15 | 宁波方太厨具有限公司 | Fan system of range hood |
| CN110397631A (en) * | 2019-06-21 | 2019-11-01 | 上海德惠特种风机有限公司 | A kind of inhibition noise structure for blower |
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| US20080229776A1 (en) * | 2007-03-21 | 2008-09-25 | Samsung Electronics Co., Ltd. | Centrifugal blower and air conditioner having the same |
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| US5230327A (en) * | 1992-07-28 | 1993-07-27 | Jang Sun Sing | Kitchen smoke exhauster |
| JP4638026B2 (en) * | 2000-12-28 | 2011-02-23 | 三菱重工業株式会社 | Centrifugal blower and vehicle air conditioner equipped with the same |
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| CN102767541A (en) | 2012-11-07 |
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