CN108253476B - Single-air-inlet range hood - Google Patents
Single-air-inlet range hood Download PDFInfo
- Publication number
- CN108253476B CN108253476B CN201611244024.7A CN201611244024A CN108253476B CN 108253476 B CN108253476 B CN 108253476B CN 201611244024 A CN201611244024 A CN 201611244024A CN 108253476 B CN108253476 B CN 108253476B
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- Prior art keywords
- plate
- spiral case
- peripheral frame
- fan
- range hood
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- 230000009467 reduction Effects 0.000 claims abstract description 26
- 230000002093 peripheral effect Effects 0.000 claims description 54
- 230000030279 gene silencing Effects 0.000 claims description 28
- 229920000742 Cotton Polymers 0.000 claims description 15
- 238000005192 partition Methods 0.000 claims description 15
- 230000003584 silencer Effects 0.000 claims description 6
- 238000009423 ventilation Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 9
- 230000001902 propagating effect Effects 0.000 abstract 1
- 239000003517 fume Substances 0.000 description 16
- 238000010586 diagram Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 4
- 239000006233 lamp black Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The utility model provides a single air inlet range hood, includes fan, fan dustcoat and collection petticoat pipe, and the fan is including the spiral case, and the spiral case has the spiral case preceding curb plate, spiral case posterior lateral plate and locates the spiral case annular wall between the preceding curb plate of spiral case and the spiral case posterior lateral plate, opens on the preceding curb plate of spiral case and has preceding air intake, its characterized in that: a rear vent is formed in the rear side plate of the volute, a guide plate is arranged between the front side plate of the volute and a rear side cover plate of the fan housing, and a noise reduction cavity communicated with the rear vent is formed among the guide plate, the volute and the fan housing. The invention has the advantages that: after the guide plate is arranged on the range hood, the range hood has a good guide effect on turbulent flow passing through the oil filter screen, pneumatic noise of the path is reduced, meanwhile, the noise reduction cavity can eliminate flow noise of air flow disturbance in a narrow space at the rear side of the fan housing, blocks the path of noise outwards propagating through the rear side of the fan housing, can also be used as a pressure relief space under the condition of large resistance of a public flue, and reduces impact noise of resistance of air flow resistance.
Description
Technical Field
The invention relates to a range hood, in particular to a single air inlet range hood.
Background
At present, a top-suction type range hood generally comprises a fan, a fan outer cover and a fume collecting hood arranged below the fan outer cover, wherein the fan comprises a volute, an impeller and a motor for driving the impeller. The air inlet of the top-suction type range hood is positioned on the side face of the volute, namely, single-side air inlet is adopted, so that the air inlet area is small, and the oil smoke discharging amount is small. In order to overcome the defect of single-side air intake of a fan, a double-side air intake type range hood is disclosed in the prior art, such as a range hood with an induced draft double-injection acceleration function disclosed in Chinese patent application No. 201110027636.1 (issued publication No. CN 102072515A), the range hood is provided with a case and a fume collecting hood, a volute is arranged in the case, an impeller and a motor are arranged in the volute, a front air inlet and a rear air inlet are arranged on the volute, a first fume channel is arranged from the starting end of the fume collecting hood fume collecting area to the front air inlet, a second fume channel is arranged from the starting end of the fume collecting hood fume collecting area to the rear air inlet, the diameters of the two fume channels are gradually reduced, the rising of airflow is facilitated, the fume is accelerated to be sucked away, and the fume absorbing effect is improved. However, because two oil smoke channels are formed, oil smoke enters the fan from the front air inlet and the rear air inlet, and the noise of the range hood mainly comes from the inside of the centrifugal fan, so that the centrifugal fan can radiate larger noise outwards through the two air inlets in the working process. In view of the above, there is a need for further improvement in the structure of the conventional range hood.
Disclosure of Invention
The invention aims to solve the technical problem of providing the single-air-inlet range hood which can guide turbulent flow passing through an oil filter screen and has good noise reduction effect.
The technical scheme adopted by the invention for solving the technical problems is as follows: this single air inlet range hood, including fan, fan dustcoat and the collection petticoat pipe of locating the fan dustcoat below, the fan is including the spiral case and locate the spiral case in the impeller, the spiral case has the spiral case preceding curb plate, spiral case posterior lateral plate and locates spiral case annular wall between spiral case preceding curb plate and the spiral case posterior lateral plate it has preceding air intake, its characterized in that to open on the spiral case preceding curb plate: the spiral case rear side plate is provided with a rear vent communicated with a fan air outlet, the rear vent and the front air inlet are mutually blocked by the middle disc of the impeller, a guide plate is arranged between the spiral case front side plate and the rear side cover plate of the fan outer cover, and a noise reduction cavity communicated with the rear vent is formed by enclosing the guide plate, the spiral case and the fan outer cover.
Preferably, the baffle is arranged obliquely downwards from front to back, the front side edge of the baffle is arranged on the front side plate of the volute, the rear side edge of the baffle is arranged on the fume collecting hood, an oil filter screen obliquely downwards from front to back is arranged below the fan, and an oil smoke channel is formed between the oil filter screen and the baffle. After the oil fume channel is formed between the guide plate and the oil filter screen, the oil fume on the rear side part below the range hood can be smoothly guided into the front air inlet of the fan by the oil guide plate.
In order to improve the noise reduction effect of the range hood, the annular wall of the volute is provided with meshes, and the periphery of the annular wall of the volute is wrapped with annular sound absorbing cotton.
In order to further improve the noise reduction effect of the range hood, a silencer is arranged in the noise reduction cavity, and the silencer is positioned at the back of the fan.
The muffler can have various structures, preferably, the muffler includes the amortization support and inhale the sound cotton, the amortization support includes interior frame and peripheral frame, interior frame encloses into just to the muffler air intake of back vent, it has first amortization hole to enclose to be covered with on the lateral wall of frame in, it has a plurality of amortization chambeies to separate between frame and the peripheral frame in, every the amortization intracavity packing have inhale the sound cotton.
Further preferably, the peripheral frame is a square frame, a left side plate, a right side plate and a top plate of the peripheral frame are mounted on the fan outer cover, and a bottom plate of the peripheral frame is provided with a second silencing hole communicated with the noise reduction cavity.
As a preferable scheme, the inner peripheral frame is a round frame, a partition plate which is distributed in a spoke shape is arranged between the inner peripheral frame and the outer peripheral frame, an annular partition plate which surrounds the periphery of the inner peripheral frame is arranged between the inner peripheral frame and the outer peripheral frame, so that the silencing cavity is divided into an inner silencing cavity and an outer silencing cavity, and third silencing holes are distributed on the annular partition plate. Of course, more than one annular partition plate can be arranged, so that more than two layers of silencing cavities are formed between the inner peripheral frame and the outer peripheral frame.
As another preferable scheme, the inner peripheral frame is a square frame, a partition plate is arranged between the inner peripheral frame and the outer peripheral frame to form the silencing cavity, and a fourth silencing hole is formed in the partition plate.
Compared with the prior art, the invention has the advantages that: this single-inlet air range hood sets up the guide plate after between the back side cap board of spiral case front side board and fan dustcoat, has played fine water conservancy diversion effect to the turbulent flow through the oil filter screen, has reduced the pneumatic noise of this route, simultaneously, after forming the cavity of making an uproar that is linked together with the vent behind the fan rear side between guide plate, spiral case and the fan dustcoat, can eliminate the flow noise of fan dustcoat rear side in the narrow and small space air current disorder, the route that the blocking noise was passed outwards through in fan dustcoat rear side to, can also regard as the pressure release space under the circumstances of public flue big resistance, reduce the impact noise of air current resistance.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of the present invention;
fig. 2 is a sectional view showing a structure of the range hood of fig. 1 after being mounted on a wall;
FIG. 3 is a schematic structural diagram of a fan according to a first embodiment of the present invention;
fig. 4 is a schematic structural view of a volute according to a first embodiment of the present invention;
FIG. 5 is a schematic diagram of a second embodiment of the present invention;
fig. 6 is a structural cross-sectional view of the range hood of fig. 5;
fig. 7 is a schematic structural diagram of a sound-deadening bracket according to a second embodiment of the present invention;
FIG. 8 is a schematic diagram of a third embodiment of the present invention;
fig. 9 is a structural cross-sectional view of the range hood of fig. 8;
fig. 10 is a schematic structural view of a sound-deadening bracket according to a third embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the embodiments of the drawings.
Embodiment one:
as shown in fig. 1 to 4, the single air intake range hood in the present embodiment includes a blower 1, a blower housing 2, and a fume collecting hood 3 provided below the blower housing 2. The fan 1 includes a scroll 4 and an impeller 5 provided in the scroll 4, the scroll 4 having a scroll front side plate 41, a scroll rear side plate 42, and a scroll annular wall 43 provided between the scroll front side plate and the scroll rear side plate, the impeller 5 having a center plate 51. Taking the direction indicated by arrow A in FIG. 2 as the backward direction, the fan housing 2 is installed on the wall 15, a front air inlet 411 is formed on the front side plate 41 of the volute, a rear air vent 421 is formed on the rear side plate 42 of the volute, the front air inlet 411 and the rear air vent 421 are mutually blocked by the middle plate 51, and the front air inlet 411 and the rear air vent 421 are both communicated with the fan air outlet 6.
A baffle 7 is disposed between the front side plate 41 of the volute and the rear side plate 21 of the fan housing 2, in this embodiment, the baffle 7 is disposed obliquely downward from front to back, the front side of the baffle 7 is mounted on the front side plate 41 of the volute, and the rear side of the baffle 7 is mounted on the fume collecting hood 3. The deflector 7 can play a good role in guiding turbulence, and guide the airflow passing through the front air inlet 411 of the fan, so as to avoid the airflow from impacting the front of the bottom of the volute 4, thereby reducing the pneumatic noise of the path.
In this embodiment, the baffle 7, the volute 4 and the fan housing 2 enclose a noise reduction cavity 8, and the noise reduction cavity 8 is communicated with the rear ventilation opening 421. When the range hood works, air flow is sucked into the front side part of the impeller 5 from the front air inlet 411 of the fan, and because the front air inlet 411 and the rear air vent 421 are blocked, the air flow can only flow out from the air outlet 6 of the fan, and under the condition of large resistance of a public flue, the air flow at the air outlet 6 of the fan can flow back to the rear side part of the impeller 5, and then flows back into the noise reduction cavity 8 through the rear air vent 421. Therefore, after the noise reduction cavity 8 is arranged, the noise reduction cavity 8 blocks the airflow source of the rear ventilation opening 421, so that the flow noise of the airflow disorder in the narrow space at the rear side of the fan housing 2 is eliminated, the outward transmission path of the noise through the rear side of the fan housing 2 can be blocked, and under the condition of large resistance of the public flue, the noise reduction cavity 8 can also play a role in pressure relief, and the flow noise caused by the airflow in the countercurrent return noise reduction cavity 8 is blocked in the noise reduction cavity 8. In addition, the range hood is provided with a mesh 431 on the volute annular wall 43, and the periphery of the volute annular wall 43 is wrapped with annular sound absorbing cotton 11. The annular sound absorbing cotton 11 can absorb part of flowing noise in the noise reduction cavity 8, so that the noise of the range hood during operation is further reduced on the premise of not losing air quantity and air pressure.
Through experiments, although the noise reduction cavity 8 blocks the rear side air inlet channel of the fan 1, the influence on the air performance of the range hood is small, so that the noise of the range hood is reduced by 2-3 db during normal operation, and a good noise reduction function is achieved.
The oil filter 12 of the range hood is arranged below the fan 1 and is obliquely downwards from front to back, and a lampblack channel 13 is reserved between the oil filter 12 and the guide plate 7, so that lampblack at the rear side part below the range hood can be smoothly guided into the front air inlet 411 of the fan 1 by the guide plate 7. In order to improve the rectifying effect, the range hood is provided with a rectifying plate 14 substantially parallel to the oil filter 12 below the oil filter 12.
Embodiment two:
as shown in fig. 5 to 7, the single-intake range hood of the present embodiment is provided with a muffler in the noise reduction chamber 8, the muffler being located at the back of the blower 1. The muffler includes a sound deadening bracket 9 and sound absorbing cotton 10, the sound deadening bracket 9 including an inner peripheral frame 91 and an outer peripheral frame 92. The inner peripheral frame 91 is a round frame, the inner peripheral frame 91 encloses a muffler air inlet 97 opposite to the rear ventilation opening 421, and the side wall of the inner peripheral frame 91 is fully covered with a first muffler hole 911. The peripheral frame 92 is a square frame, the left side plate, the right side plate and the top plate of the peripheral frame 92 are arranged on the fan outer cover 2, a second silencing hole 921 communicated with the noise reduction cavity 8 is formed in the bottom plate of the peripheral frame 92, the aperture of the second silencing hole is 4mm, and the hole spacing is 8mm.
A partition plate 93 is provided between the inner peripheral frame 91 and the outer peripheral frame 92 in a spoke-like manner, so that a plurality of sound deadening chambers 95 are partitioned between the inner peripheral frame 91 and the outer peripheral frame 92, and no openings are provided in the partition plate 93. Further, an annular partition plate 94 is provided between the inner peripheral frame 91 and the outer peripheral frame 92 around the outer periphery of the inner peripheral frame, so that the sound deadening chamber 95 is divided into an inner sound deadening chamber 951 and an outer sound deadening chamber 952. In addition, third sound deadening holes 941 are distributed on the annular partition plate 94, and sound absorbing cotton 10 is filled in each of the inner sound deadening chamber 951 and the outer sound deadening chamber 952.
In this embodiment, the aperture of the first sound deadening hole 911 is 3mm, and the hole pitch is 6mm; the third sound deadening hole 941 has a hole diameter of 2.5mm and a hole pitch of 6mm.
When the range hood works, firstly, noise transmitted from the fan rear ventilation opening 421 enters the inner layer silencing cavity 951 and is absorbed by the sound absorbing cotton 10 in the inner layer silencing cavity 951; then, the noise enters the outer sound-deadening chamber 952 after passing through the inner sound-deadening chamber 951, and is absorbed by the sound-absorbing cotton 10 in the outer sound-deadening chamber 952, and finally only a part of the noise enters the noise-deadening chamber 8 through the outer sound-deadening chamber 952. Therefore, through the double-layer silencing cavity and the structure of the sound absorbing cotton, noise is effectively absorbed, and a good noise reduction effect is achieved.
Embodiment III:
as shown in fig. 8 to 10, the sound deadening bracket of the muffler in the present embodiment is different from that in the second embodiment. In the present embodiment, the inner peripheral frame 91 of the sound deadening bracket 9 is a square frame, and a partition plate 96 is provided between the inner peripheral frame 91 and the outer peripheral frame 92, so that a plurality of sound deadening chambers 95 are partitioned between the inner peripheral frame 91 and the outer peripheral frame 92. In addition, a fourth sound deadening hole 961 is opened in the partition plate 96 so that each sound deadening chamber 95 communicates with each other, and each sound deadening chamber 95 is filled with the sound absorbing cotton 10. In this embodiment, the second sound deadening holes 921 have a hole diameter of 4mm and a hole pitch of 8mm.
When the range hood works, noise transmitted from the fan rear ventilation opening 421 enters each silencing cavity 95, and as the silencing cavities 95 are mutually communicated, the noise in the cavities can be repeatedly absorbed by the sound absorbing cotton 10 in the silencing cavities 95, so that a good noise reduction effect is achieved.
The foregoing is merely illustrative of the preferred embodiments of this invention, and it will be appreciated by those skilled in the art that variations and modifications of this invention can be made without departing from the principles of the invention, and these are considered to be within the scope of the invention.
Claims (6)
1. The utility model provides a single air inlet range hood, includes fan (1), fan dustcoat (2) and locates collection petticoat pipe (3) of fan dustcoat below, fan (1) are including spiral case (4) and impeller (5) in locating the spiral case, spiral case (4) have spiral case preceding curb plate (41), spiral case posterior lateral plate (42) and locate spiral case annular wall (43) between spiral case preceding curb plate and the spiral case posterior lateral plate it has preceding air intake (411) to open on spiral case preceding curb plate (41), its characterized in that: the utility model provides a spiral case posterior lateral plate (42) is gone up and is opened back vent (421) that are linked together with fan air outlet (6), this posterior vent (421) with preceding air intake (411) are passed through centre dish (51) of impeller (5) separates each other be equipped with guide plate (7) between spiral case anterior lateral plate (41) and the back side cap (21) of fan dustcoat (2), enclose between guide plate (7), spiral case (4) and fan dustcoat (2) become with noise reduction chamber (8) that are linked together with posterior vent (421), guide plate (7) are from preceding setting up downwards to one side, the preceding side of guide plate (7) is installed on spiral case anterior lateral plate (41), the rear side of guide plate (7) is installed on collection petticoat pipe (3) the below of fan (1) is equipped with from preceding backward decurrent oil filter screen (12), just form between guide plate (12) and guide plate (7), open on annular wall (43) have mesh (431) to inhale oily cotton wall (43) and wrap up in annular spiral case (43) periphery.
2. The single-intake range hood of claim 1, wherein: the noise reduction cavity (8) is internally provided with a silencer, and the silencer is positioned at the back of the fan (1).
3. The single-intake range hood of claim 2, wherein: the silencer comprises a silencing support (9) and sound absorbing cotton (10), the silencing support (9) comprises an inner peripheral frame (91) and an outer peripheral frame (92), the inner peripheral frame (91) is enclosed to form a silencer air inlet (97) opposite to the rear ventilation opening (421), first silencing holes (911) are distributed in the side wall of the inner peripheral frame (91), a plurality of silencing cavities (95) are formed between the inner peripheral frame (91) and the outer peripheral frame (92) in a separated mode, and the sound absorbing cotton (10) is filled in each silencing cavity (95).
4. A single-intake range hood according to claim 3, wherein: the peripheral frame (92) is a square frame, a left side plate, a right side plate and a top plate of the peripheral frame (92) are arranged on the fan outer cover (2), and a bottom plate of the peripheral frame (92) is provided with a second silencing hole (921) communicated with the noise reduction cavity (8).
5. The single-intake range hood of claim 4, wherein: the inner peripheral frame (91) is a round frame, a partition plate (93) which is distributed in a spoke shape is arranged between the inner peripheral frame (91) and the outer peripheral frame (92), an annular partition plate (94) which surrounds the periphery of the inner peripheral frame is arranged between the inner peripheral frame (91) and the outer peripheral frame (92), so that the silencing cavity (95) is divided into an inner silencing cavity (951) and an outer silencing cavity (952), and third silencing holes (941) are distributed on the annular partition plate (94).
6. The single-intake range hood of claim 4, wherein: the inner peripheral frame (91) is a square frame, a separation plate (96) is arranged between the inner peripheral frame (91) and the outer peripheral frame (92) to form the silencing cavity (95), and a fourth silencing hole (961) is formed in the separation plate (96).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244024.7A CN108253476B (en) | 2016-12-29 | 2016-12-29 | Single-air-inlet range hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244024.7A CN108253476B (en) | 2016-12-29 | 2016-12-29 | Single-air-inlet range hood |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108253476A CN108253476A (en) | 2018-07-06 |
| CN108253476B true CN108253476B (en) | 2024-01-16 |
Family
ID=62720499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611244024.7A Active CN108253476B (en) | 2016-12-29 | 2016-12-29 | Single-air-inlet range hood |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108253476B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822504B (en) * | 2018-08-10 | 2021-05-25 | 佛山市顺德区美的洗涤电器制造有限公司 | Smoke exhaust ventilator |
| CN115539408A (en) * | 2021-06-29 | 2022-12-30 | 佛山市顺德区美的洗涤电器制造有限公司 | Fan subassembly and household electrical appliances |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07286935A (en) * | 1994-04-19 | 1995-10-31 | Nippon Kagaku Kogyo Kk | Low-noise axial blower for circulating wind-tunnel facility |
| CN101545651A (en) * | 2009-03-27 | 2009-09-30 | 武汉创新环保工程有限公司 | Wall-hung thin type lampblack depurating machine |
| CN201925999U (en) * | 2011-01-21 | 2011-08-10 | 宁波方太厨具有限公司 | Range hood with induced-draft double-injection accelerating function |
| CN202883470U (en) * | 2012-09-24 | 2013-04-17 | 浙江苏泊尔家电制造有限公司 | Fan structure of noise-reduction type extractor hood |
| CN206330187U (en) * | 2016-12-29 | 2017-07-14 | 宁波方太厨具有限公司 | A kind of single air-inlet range hood |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748787A (en) * | 2012-06-15 | 2012-10-24 | 海尔集团公司 | Low noise range hood equipped with diversion noise reducing acoustical panel |
| CN104180413B (en) * | 2014-08-22 | 2017-05-03 | 广东海信家电有限公司 | Top-suction extractor hood with smoke deflector |
-
2016
- 2016-12-29 CN CN201611244024.7A patent/CN108253476B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07286935A (en) * | 1994-04-19 | 1995-10-31 | Nippon Kagaku Kogyo Kk | Low-noise axial blower for circulating wind-tunnel facility |
| CN101545651A (en) * | 2009-03-27 | 2009-09-30 | 武汉创新环保工程有限公司 | Wall-hung thin type lampblack depurating machine |
| CN201925999U (en) * | 2011-01-21 | 2011-08-10 | 宁波方太厨具有限公司 | Range hood with induced-draft double-injection accelerating function |
| CN202883470U (en) * | 2012-09-24 | 2013-04-17 | 浙江苏泊尔家电制造有限公司 | Fan structure of noise-reduction type extractor hood |
| CN206330187U (en) * | 2016-12-29 | 2017-07-14 | 宁波方太厨具有限公司 | A kind of single air-inlet range hood |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108253476A (en) | 2018-07-06 |
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