EP3421891B1 - Cooker hood - Google Patents
Cooker hood Download PDFInfo
- Publication number
- EP3421891B1 EP3421891B1 EP18176223.8A EP18176223A EP3421891B1 EP 3421891 B1 EP3421891 B1 EP 3421891B1 EP 18176223 A EP18176223 A EP 18176223A EP 3421891 B1 EP3421891 B1 EP 3421891B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- air
- pipe
- air intake
- air exhaust
- guide pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000004891 communication Methods 0.000 claims description 6
- 239000000779 smoke Substances 0.000 description 26
- 238000007789 sealing Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 9
- 239000003517 fume Substances 0.000 description 4
- 230000003068 static effect Effects 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010411 cooking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 241000886569 Cyprogenia stegaria Species 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 210000003127 knee Anatomy 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011664 nicotinic acid Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
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
Definitions
- the present invention relates to the technical field of kitchen appliances, and specifically relates to a low-noise cooker hood.
- cooker hoods used by all families all exhaust smoke to a public pipeline, and a relatively high static pressure is formed inside the public pipeline when a plurality of users uses the cooker hoods at the same time.
- a cooker hood is required to provide a higher static pressure.
- a cooker hood generates loud noise when improving the static pressure to provide the enough air volume, and consequently, the comfort of using the cooker hood by a user is affected.
- CN201925993U discloses a range hood with a current-stabilization noise-reduction structure, comprising an enclosure with an air inlet and an air outlet.
- a volute casing with a front air inlet is arranged in the enclosure.
- An impeller driven by a motor to rotate is arranged in the volute casing.
- the range hood is characterized in that: a guiding cover which guides flue gas to the front air inlet of the volute casing from the air inlet of the enclosure is fixed on a front cover plate of the volute casing, and a front flue gas guiding channel with gradually-reduced caliber from top to bottom is formed between the guiding cover and the front end surface of the volute casing.
- CN201242205Y describes a smoke exhaust ventilator which is used to discharge oil with low noise in kitchens.
- the smoke exhaust ventilator adopts an inner shell structure which is shaped by a micro perforated panel, a fan installation cavity structure which is provided with a transverse micro perforated panel and a vertical micro perforated panel, an inner layer air exhaust pipe knee structure which is shaped by the micro perforated panel and a sound-absorbing layer structure which is attached on the outer surface of a fan shell and is made of sound absorbing materials, a sound-deadening resonant cavity structure which is composed of each micro perforated panel and a corresponding outer shell structure and a resistance noise reduction structure which is formed by the sound-absorbing layer, wherein low, medium and high noise in the whole frequency band which is generated in the working process of the smoke exhaust ventilator can obtain good sound-deadening effect, thereby solving the noise problem which is generated when the smoke exhaust ventilator is used.
- WO 2018/069813 A1 discloses a hood for the suction of cooking fumes comprised of a box-shaped body defining at least one duct for the suction of cooking fumes, the duct presenting at least one opening facing an external environment and arranged on an inclined plane with respect to the vertical direction, the box-shaped body presenting at least one side wall in contact with the external environment, a suction placed in fluid communication with the duct; a grill panel facing the suction; at least one perforated panel opposite the grill panel and arranged substantially parallel to the side wall to define a plurality of acoustic resonance cavities in cooperation with the side wall.
- CN101457946A discloses a bionic microporous noise-reducing structure which is used for an oil fume extraction system.
- the structure comprises a shell body. Oil fume passes by the inner cavity of the shell body and contacts with the inner wall of the shell body.
- the invention is characterized in that the outer side of the shell body is fixedly provided with a noise-reducing box which is enclosed at the periphery.
- the noise-reducing box is internally provided with at least one layer of porous plate which is distributed with tight millipores, so the noise-reducing box is divided into at least an inner cavity and an outer cavity. Bar-shaped pores are tightly distributed on the shell body.
- the inner cavity of the shell body is communicated with the inner cavity of the noise-reducing box by the bar-shaped pores.
- a technical problem that the present invention resolves is how to reduce noise generated when a cooker hood runs.
- the present invention provides a cooker hood, including: a housing, and a fan mounted in the housing, where the fan includes an air intake vent and an air exhaust vent; and further including: an air guide pipe mounted in the housing, where the air guide pipe includes an air intake vent and an air exhaust vent, and the air exhaust vent of the air guide pipe is connected to the air intake vent of the fan.
- a pipe wall of the air guide pipe is provided with acoustic attenuation micro holes.
- the housing includes: an upper housing, where the upper housing includes an air intake vent and an air exhaust vent, and the fan and the air guide pipe are mounted in the upper housing; and a lower housing, where the lower housing includes left and right air intake openings and an air exhaust opening, and the air intake vent of the upper housing is connected to the air exhaust opening of the lower housing.
- the cooker hood further includes: a fan separator mounted in the upper housing, where the fan separator separates the fan from the air guide pipe, so that the fan and the air guide pipe are in two chambers of the upper housing.
- the fan has a volute, and the surface of the volute is provided with acoustic attenuation micro holes.
- the cooker hood further includes: an external air guide pipe, where the external air guide pipe is mounted in the housing and is sleeved outside the air guide pipe; and a pipe wall of the external air guide pipe is provided with acoustic attenuation micro holes.
- the cooker hood further includes: a plurality of flow guide plates, where the flow guide plate is mounted in the air guide pipe; and the surface of the flow guide plates is provided with acoustic attenuation micro holes.
- the cooker hood further includes: a plurality of first thin plates, where the first thin plate is mounted in the air guide pipe and is located below the flow guide plate; and the surface of the first thin plate is provided with acoustic attenuation micro holes.
- the housing includes: an upper housing, where the upper housing includes an air intake vent and an air exhaust vent, and the fan and the air guide pipe are mounted in the upper housing; and a lower housing, where the lower housing includes left and right air intake openings and an air exhaust opening, and the air intake vent of the upper housing is connected to the air exhaust opening of the lower housing.
- the cooker hood further includes: a fan separator mounted in the upper housing, where the fan separator separates the fan from the air guide pipe, so that the fan and the air guide pipe are in two chambers of the upper housing.
- the lower housing includes: a left air intake portion, where the left air intake portion is provided with the left air intake opening; a right air intake portion, where the right air intake portion is provided with the right air intake opening; and an air exhaust portion, where the air exhaust portion is provided with an air exhaust opening, the air exhaust portion is located between the left air intake portion and the right air intake portion, and a cavity of the air exhaust portion is respectively in communication with a cavity of the left air intake portion and a cavity of the right air intake portion.
- the cooker hood further includes: a left air exhaust pipe and a right air exhaust pipe that are mounted in the air exhaust portion, where the left air exhaust pipe is respectively connected to the cavity of the left air intake portion and the air exhaust opening, the right air exhaust pipe is respectively connected to the cavity of the right air intake portion and the air exhaust opening, and pipe walls of the left air exhaust pipe and the right air exhaust pipe are provided with acoustic attenuation micro holes.
- a three-way air exhaust pipe is mounted in the cavity of the air exhaust portion; the three-way air exhaust pipe is respectively connected to the cavity of the left air intake portion, the cavity of the right air intake portion, and the air exhaust opening; and a pipe wall of the three-way air exhaust pipe is provided with acoustic attenuation micro holes.
- the cooker hood further includes: a plurality of second thin plates, where the second thin plate is mounted in the three-way air exhaust pipe, and the second thin plate is provided with acoustic attenuation micro holes.
- a left air intake pipe is mounted in the left air intake portion, the left air intake pipe is respectively connected to the left air intake opening and the cavity of the air exhaust portion, and a pipe wall of the left air intake pipe is provided with acoustic attenuation micro holes.
- a right air intake pipe is mounted in the right air intake portion, the right air intake pipe is respectively connected to the right air intake opening and the cavity of the air exhaust portion, and a pipe wall of the right air intake pipe is provided with acoustic attenuation micro holes.
- a cooker hood including a housing, a fan and an air guide pipe, where the fan and the air guide pipe are mounted in the housing.
- the fan and the air guide pipe both have an air intake vent and an air exhaust vent, where the air exhaust vent of the air guide pipe is connected to the air intake vent of the fan. After the fan starts working, smoke enters the air intake vent of the air guide pipe, passes through the air exhaust vent of the air guide pipe and enters the fan, and finally is exhausted to a public pipeline by the fan.
- a pipe wall of the air guide pipe is provided with a plurality of acoustic attenuation micro holes, noise generated when the cooker hood runs leaks out of the acoustic attenuation micro holes on the air guide pipe when passing through the air guide pipe, and the noise is reflected in space between the pipe wall of the air guide pipe and the housing back and forth for a plurality of times and is reduced after being reflected for the plurality of times, thereby achieving an effect of reducing the noise of the cooker hood.
- a low-noise cooker hood 1 which includes a housing 30, a fan 11 and an air guide pipe 12.
- the housing 30 includes an upper housing 10 and a lower housing 20, and a first separator 31 is mounted between the upper housing 10 and the lower housing 20.
- the fan 11 and the air guide pipe 12 are both mounted in the upper housing 10 of the housing 30.
- the fan and the air guide pipe are not limited to be mounted only in the upper housing, and may be mounted in the lower housing.
- a first part 101 and a second part 102 are included in the upper housing 10 in FIG. 3 to better present a mounting structure in the upper housing 10.
- the upper housing 10 has an air inlet 10a and an air outlet 10b.
- the fan 11 has an air intake vent 11a and an air exhaust vent 11b, where the air exhaust vent 11b of the fan is aligned with the air outlet 10b of the upper housing 10.
- the air guide pipe 12 has an air intake vent 12a and an air exhaust vent 12b, where the air intake vent 12a of the air guide pipe 12 is aligned with the air inlet 10a of the upper housing 10, and the air exhaust vent 12b of the air guide pipe 12 is connected to the air intake vent 11a of the fan 11.
- a pipe wall of the air guide pipe 12 is provided with a plurality of acoustic attenuation micro holes.
- the noise leaks out of the acoustic attenuation micro holes on the air guide pipe 12, and the noise is reflected in space between the pipe wall of the air guide pipe 12 and the upper housing 10 back and forth for a plurality of times and is reduced after being reflected for the plurality of times, thereby achieving an effect of reducing the noise of the cooker hood 1.
- the cooker hood 1 further includes a fan separator 16 mounted in the upper housing 10, the fan separator 16 separates the upper housing 10 into two chambers, and the fan 11 and the air guide pipe 12 are in the two chambers separately.
- the fan separator 16 has an opening 161, and an air intake vent 11a of the fan 11 and an air exhaust vent 12b of the air guide pipe 12 are respectively aligned with the opening 161 on the fan separator 16.
- the fan 11 has a volute 111, and the surface of the volute 111 is provided with a plurality of acoustic attenuation micro holes. Noise generated when the fan 11 works leaks out of the acoustic attenuation micro holes on the surface of the volute 111, is reflected in space between the volute 111 and the upper housing 10 back and forth, and is reduced after being reflected for a plurality of times, thereby achieving an effect of reducing the noise.
- An external air guide pipe 13 is further mounted in the upper housing 10, and the external air guide pipe 13 is sleeved outside the air guide pipe 12.
- a pipe wall of the external air guide pipe 13 is provided with a plurality of acoustic attenuation micro holes. After the noise of the smoke leaks out of the acoustic attenuation micro holes of the air guide pipe 12, a part of the noise is reflected in space between the air guide pipe 12 and the external air guide pipe 13 back and forth, and the other part of the noise leaks out of the acoustic attenuation micro holes of the external air guide pipe 13 and is reflected back and forth in space between the external air guide pipe 13 and the upper housing 10.
- using two layers of air guide pipes can improve a noise reduction effect.
- Flow guide plates 14 are mounted in the air guide pipe 12, and the flow guide plates 14 dispersedly suck the smoke in the air guide pipe 12, to avoid that the smoke centers on a middle part of the air guide pipe 12 and is rare on two sides of the air guide pipe 12, so that the smoke generates an even pressure to the air guide pipe 12.
- the surface of each flow guide plate 14 is provided with a plurality of acoustic attenuation micro holes. When passing through the flow guide plate 14, the noise of the smoke leaks out of the acoustic attenuation micro holes of the flow guide plate 14 and is reflected between neighboring flow guide plates 14 back and forth.
- three flow guide plates 14 are mounted in the air guide pipe 12, and more flow guide plates may be used in an air guide pipe in another embodiment.
- First thin plates 15 are further mounted in the air guide pipe 12, and the first thin plates 15 are located below the flow guide plate 14.
- the smoke When entering the air guide pipe 12 from the air intake vent 12a of the air guide pipe 12, the smoke first passes through a narrow gap formed between neighboring first thin plates 15, so that a speed of the smoke can be reduced, to prevent the smoke from striking the air guide pipe 12.
- the surface of each first thin plate 15 is provided with a plurality of attenuation micro holes. When passing through the first thin plate 15, the noise of the smoke leaks out of the acoustic attenuation micro holes of the first thin plate 15 and is reflected between neighboring first thin plates 15 back and forth.
- first thin plates 15 are parallel to each other, and the surface of the first thin plate 15 is a curved surface and a cross-section thereof is "S" shaped.
- the noise is reflected on the "S" shaped surface for a plurality of times when passing through the first thin plate 15 having the "S" shaped cross-section, thereby achieving a better noise reduction effect.
- first thin plates may not be parallel to each other, and the surface of the first thin plate may be a plane.
- the housing 30 is divided into two parts, and includes an upper housing 10 and a lower housing 20.
- the upper housing 10 has an air inlet 10a and an air outlet 10b.
- the lower housing 20 has an air intake surface 20a and an air exhaust surface 20b, and the air intake surface 20a is used for facing a cooktop that generates smoke, and the air exhaust surface 20b is used for connecting to the upper housing 10.
- the air intake surface 20a has a left air intake opening 201a and a right air exhaust opening 202a
- the air exhaust surface 20b has an air exhaust opening 203b
- the air inlet 10a of the upper housing 10 is connected to the air exhaust opening 203b of the lower housing 20.
- the air exhaust surface 20b of the lower housing 20 is parallel to the horizontal plane, and an angle is formed between the air intake surface 20a and the horizontal plane.
- the smoke is sucked from the left air intake opening 201a or the right air intake opening 202a after the fan 11 starts working, flows out of the air exhaust opening 203b to enter the air guide pipe 12 of the upper housing 10, then enters the fan 11 through the air guide pipe 12, and finally is exhausted outside the cooker hood 1 by the fan 11 through the air exhaust vent 11b of the fan 11.
- the lower housing 20 includes a left air intake portion 201, a right air intake portion 202 and an air exhaust portion 203.
- the left air intake portion 201 is provided with the left air intake opening 201a;
- the right air intake portion 202 is provided with the right air intake opening 202a;
- the air exhaust portion 203 is located between the left air intake portion 201 and the right air intake portion 202, a cavity of the air exhaust portion 203 is in communication with a cavity of the left air intake portion 201 through a left middle hole 21c and in communication with a cavity of the right air intake portion 202 through a right middle hole 22c, and the air exhaust portion 203 is provided with the air exhaust opening 203b.
- the air exhaust portion 203 is further mounted with a left air exhaust pipe 231 and a right air exhaust pipe 232, one end of the left air exhaust pipe 231 is connected to the left middle hole 21c between the left air intake portion 201 and the air exhaust portion 203, the other end is connected to the air exhaust opening 203b of the air exhaust portion 203, and the smoke enters from the left middle hole 21c and flows out to the upper housing 10 through the air exhaust opening 203b.
- two ends of the right air exhaust pipe 232 are respectively connected to the right middle hole 22c between the right air intake portion 202 and the air exhaust portion 203 and the air exhaust opening 203b of the air exhaust vent 203, and the smoke enters from the right middle hole 22c and flows out to the upper housing 10 through the air exhaust opening 203b.
- a pipe wall of the left air exhaust pipe 231 and a pipe wall of the right air exhaust pipe 232 are provided with a plurality of acoustic attenuation micro holes.
- the noise leaks out of the acoustic attenuation micro holes of the left air exhaust pipe 231 and the right air exhaust pipe 232 and is reflected in space between the pipe wall of the left air exhaust pipe 231, the pipe wall of the right air exhaust pipe 232 and the air exhaust portion 203 back and forth for a plurality of times, to achieve an effect of reducing the noise.
- the left air intake portion 201 is mounted with a left air intake pipe 21, and two ends of the left air intake pipe 21 are respectively connected to the left air intake opening 201a and the left middle 21c between the left air intake portion 201 and the air exhaust portion 203.
- the right air intake portion 202 is mounted with a right air intake pipe 22, and two ends of the right air intake pipe 22 are respectively in communication with the right air intake opening 202a and the right middle hole 22c between the right air intake portion 202 and the air exhaust portion 203.
- Pipe walls of the left air intake pipe 21 and the right air intake pipe 22 are provided with a plurality of acoustic attenuation micro holes.
- the noise of the smoke passes through the left intake pipe 21 or the right air intake pipe 22 after entering the left air intake portion 201 or the right air intake portion 202, the noise leaks out of the acoustic attenuation micro holes of the left air intake pipe 21 or the right air intake pipe 22 and is reflected in space between the left intake pipe 21 and the left air intake portion 201 or space between the right air intake pipe 22 and the right air intake portion 202 back and forth for a plurality of times, to achieve an effect of reducing the noise.
- a lower housing 20 of a low-noise cooker hood 2 includes a left air intake portion 201, a right air intake portion 202 and an air exhaust portion 203.
- the air exhaust portion 203 is mounted with a three-way air exhaust pipe 23, a first air intake port of the three-way air exhaust pipe 23 is connected to a left middle hole 21c between the left air intake portion 201 and the air exhaust portion 203, a second air intake port is connected to a right middle hole 22c between the right air intake portion 202 and the air exhaust portion 203, and an air exhaust port is connected to an air exhaust opening 203b of the air exhaust portion 203.
- Smoke enters the three-way air exhaust pipe 23 from the left middle hole 21c or the right middle hole 22c, and flows to the upper housing 10 through the air exhaust opening 203b of the air exhaust portion 230.
- the three-way air exhaust pipe 23 is further mounted with second thin plates 24, where the surface of each second thin plate 24 is provided with a plurality of acoustic attenuation micro holes.
- the neighboring second thin plates 24 are parallel to each other, and the surface of the second thin plate 24 is a flat surface.
- the second thin plates may not be parallel to each other, and the surface of the second thin plate may be a curved surface of which a cross-section is "S" shaped.
- a connector is mounted between the air exhaust port of the three-way air exhaust pipe 23 and the air exhaust opening 203b, and the connector includes a second separator 32, an annular sealing plate 17 and a plurality of third thin plates 18.
- the second separator 32 is mounted between the air exhaust port of the three-way air exhaust pipe 23 and the annular sealing plate 17.
- the second separator 32 has an opening 32a that is made to be aligned with the air exhaust port of the three-way air exhaust pipe 23.
- the annular sealing plate 17 has an upper opening 17b and a lower opening 17a, the lower opening 17a thereof is aligned with the opening 32a of the second separator 32, and the upper opening 17b thereof is aligned with an air inlet 10a of the upper housing 10.
- the third thin plates 18 are mounted parallel to each other in the annular sealing plate 17. Peripheral walls of the annular sealing plate 17 and the surface of the third thin plate 18 are all provided with a plurality of acoustic attenuation micro holes.
- the noise When passing through the annular sealing plate 17 and the third thin plate 18, the noise leaks out of the acoustic attenuation micro holes of the annular sealing plate 17 and the third thin plate 18 and is reflected in space of the annular sealing plate 17 back and forth for a plurality of times, thereby achieving an effect of reducing the noise.
- a housing 30 of a low-noise cooker hood 3 is divided into two parts, and includes an upper housing 10 and a lower housing 20.
- the lower housing 20 has an air intake surface 20a and an air exhaust surface 20b, and the air intake surface 20a is used for facing a cooktop that generates smoke, and the air exhaust surface 20b is used for connecting to the upper housing 10.
- the air intake surface 20a has a left air intake opening 201a and a right air exhaust opening 202a
- the air exhaust surface 20b has an air exhaust opening 203b
- an air inlet 10a of the upper housing 10 is connected to the air exhaust opening 203b of the lower housing 20.
- the air exhaust surface 20b of the lower housing 20 is parallel to the horizontal plane, and the air intake surface 20a is also parallel to the horizontal plane.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Duct Arrangements (AREA)
Description
- The present invention relates to the technical field of kitchen appliances, and specifically relates to a low-noise cooker hood.
- In high-rise buildings, cooker hoods used by all families all exhaust smoke to a public pipeline, and a relatively high static pressure is formed inside the public pipeline when a plurality of users uses the cooker hoods at the same time. To ensure an enough air volume, a cooker hood is required to provide a higher static pressure.
- However, a cooker hood generates loud noise when improving the static pressure to provide the enough air volume, and consequently, the comfort of using the cooker hood by a user is affected.
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CN201925993U discloses a range hood with a current-stabilization noise-reduction structure, comprising an enclosure with an air inlet and an air outlet. A volute casing with a front air inlet is arranged in the enclosure. An impeller driven by a motor to rotate is arranged in the volute casing. The range hood is characterized in that: a guiding cover which guides flue gas to the front air inlet of the volute casing from the air inlet of the enclosure is fixed on a front cover plate of the volute casing, and a front flue gas guiding channel with gradually-reduced caliber from top to bottom is formed between the guiding cover and the front end surface of the volute casing. -
CN201242205Y describes a smoke exhaust ventilator which is used to discharge oil with low noise in kitchens. The smoke exhaust ventilator adopts an inner shell structure which is shaped by a micro perforated panel, a fan installation cavity structure which is provided with a transverse micro perforated panel and a vertical micro perforated panel, an inner layer air exhaust pipe knee structure which is shaped by the micro perforated panel and a sound-absorbing layer structure which is attached on the outer surface of a fan shell and is made of sound absorbing materials, a sound-deadening resonant cavity structure which is composed of each micro perforated panel and a corresponding outer shell structure and a resistance noise reduction structure which is formed by the sound-absorbing layer, wherein low, medium and high noise in the whole frequency band which is generated in the working process of the smoke exhaust ventilator can obtain good sound-deadening effect, thereby solving the noise problem which is generated when the smoke exhaust ventilator is used. -
WO 2018/069813 A1 discloses a hood for the suction of cooking fumes comprised of a box-shaped body defining at least one duct for the suction of cooking fumes, the duct presenting at least one opening facing an external environment and arranged on an inclined plane with respect to the vertical direction, the box-shaped body presenting at least one side wall in contact with the external environment, a suction placed in fluid communication with the duct; a grill panel facing the suction; at least one perforated panel opposite the grill panel and arranged substantially parallel to the side wall to define a plurality of acoustic resonance cavities in cooperation with the side wall. -
CN101457946A discloses a bionic microporous noise-reducing structure which is used for an oil fume extraction system. The structure comprises a shell body. Oil fume passes by the inner cavity of the shell body and contacts with the inner wall of the shell body. The invention is characterized in that the outer side of the shell body is fixedly provided with a noise-reducing box which is enclosed at the periphery. The noise-reducing box is internally provided with at least one layer of porous plate which is distributed with tight millipores, so the noise-reducing box is divided into at least an inner cavity and an outer cavity. Bar-shaped pores are tightly distributed on the shell body. The inner cavity of the shell body is communicated with the inner cavity of the noise-reducing box by the bar-shaped pores. - A technical problem that the present invention resolves is how to reduce noise generated when a cooker hood runs.
- To resolve the foregoing technical problem, the present invention provides a cooker hood, including: a housing, and a fan mounted in the housing, where the fan includes an air intake vent and an air exhaust vent; and further including: an air guide pipe mounted in the housing, where the air guide pipe includes an air intake vent and an air exhaust vent, and the air exhaust vent of the air guide pipe is connected to the air intake vent of the fan. A pipe wall of the air guide pipe is provided with acoustic attenuation micro holes. The housing includes: an upper housing, where the upper housing includes an air intake vent and an air exhaust vent, and the fan and the air guide pipe are mounted in the upper housing; and a lower housing, where the lower housing includes left and right air intake openings and an air exhaust opening, and the air intake vent of the upper housing is connected to the air exhaust opening of the lower housing. The cooker hood further includes: a fan separator mounted in the upper housing, where the fan separator separates the fan from the air guide pipe, so that the fan and the air guide pipe are in two chambers of the upper housing.
- Optionally, the fan has a volute, and the surface of the volute is provided with acoustic attenuation micro holes.
- Optionally, the cooker hood further includes: an external air guide pipe, where the external air guide pipe is mounted in the housing and is sleeved outside the air guide pipe; and a pipe wall of the external air guide pipe is provided with acoustic attenuation micro holes.
- Optionally, the cooker hood further includes: a plurality of flow guide plates, where the flow guide plate is mounted in the air guide pipe; and the surface of the flow guide plates is provided with acoustic attenuation micro holes.
- Optionally, the cooker hood further includes: a plurality of first thin plates, where the first thin plate is mounted in the air guide pipe and is located below the flow guide plate; and the surface of the first thin plate is provided with acoustic attenuation micro holes.
- According to the invention, the housing includes: an upper housing, where the upper housing includes an air intake vent and an air exhaust vent, and the fan and the air guide pipe are mounted in the upper housing; and a lower housing, where the lower housing includes left and right air intake openings and an air exhaust opening, and the air intake vent of the upper housing is connected to the air exhaust opening of the lower housing.
- According to the invention, the cooker hood further includes: a fan separator mounted in the upper housing, where the fan separator separates the fan from the air guide pipe, so that the fan and the air guide pipe are in two chambers of the upper housing.
- Optionally, the lower housing includes: a left air intake portion, where the left air intake portion is provided with the left air intake opening; a right air intake portion, where the right air intake portion is provided with the right air intake opening; and an air exhaust portion, where the air exhaust portion is provided with an air exhaust opening, the air exhaust portion is located between the left air intake portion and the right air intake portion, and a cavity of the air exhaust portion is respectively in communication with a cavity of the left air intake portion and a cavity of the right air intake portion.
- Optionally, the cooker hood further includes: a left air exhaust pipe and a right air exhaust pipe that are mounted in the air exhaust portion, where the left air exhaust pipe is respectively connected to the cavity of the left air intake portion and the air exhaust opening, the right air exhaust pipe is respectively connected to the cavity of the right air intake portion and the air exhaust opening, and pipe walls of the left air exhaust pipe and the right air exhaust pipe are provided with acoustic attenuation micro holes.
- Optionally, a three-way air exhaust pipe is mounted in the cavity of the air exhaust portion; the three-way air exhaust pipe is respectively connected to the cavity of the left air intake portion, the cavity of the right air intake portion, and the air exhaust opening; and a pipe wall of the three-way air exhaust pipe is provided with acoustic attenuation micro holes.
- Optionally, the cooker hood further includes: a plurality of second thin plates, where the second thin plate is mounted in the three-way air exhaust pipe, and the second thin plate is provided with acoustic attenuation micro holes.
- Optionally, a left air intake pipe is mounted in the left air intake portion, the left air intake pipe is respectively connected to the left air intake opening and the cavity of the air exhaust portion, and a pipe wall of the left air intake pipe is provided with acoustic attenuation micro holes.
- Optionally, a right air intake pipe is mounted in the right air intake portion, the right air intake pipe is respectively connected to the right air intake opening and the cavity of the air exhaust portion, and a pipe wall of the right air intake pipe is provided with acoustic attenuation micro holes.
- Compared with the prior art, the technical solutions of the present invention have the following beneficial effects: a cooker hood is provided, including a housing, a fan and an air guide pipe, where the fan and the air guide pipe are mounted in the housing. The fan and the air guide pipe both have an air intake vent and an air exhaust vent, where the air exhaust vent of the air guide pipe is connected to the air intake vent of the fan. After the fan starts working, smoke enters the air intake vent of the air guide pipe, passes through the air exhaust vent of the air guide pipe and enters the fan, and finally is exhausted to a public pipeline by the fan. Because a pipe wall of the air guide pipe is provided with a plurality of acoustic attenuation micro holes, noise generated when the cooker hood runs leaks out of the acoustic attenuation micro holes on the air guide pipe when passing through the air guide pipe, and the noise is reflected in space between the pipe wall of the air guide pipe and the housing back and forth for a plurality of times and is reduced after being reflected for the plurality of times, thereby achieving an effect of reducing the noise of the cooker hood.
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FIG. 1 is a three-dimensional perspective view of a cooker hood according to a first embodiment of the present invention; -
FIG. 2 is a side perspective view of an upper housing of the cooker hood inFIG. 1 ; -
FIG. 3 is a schematic diagram of mounting in an upper housing of the cooker hood inFIG. 1 ; -
FIG. 4 is a schematic three-dimensional view of a lower housing of the cooker hood inFIG. 1 ; -
FIG. 5 is a three-dimensional perspective view of a cooker hood according to a second embodiment of the present invention; -
FIG. 6 is a side perspective view of the cooker hood inFIG. 5 ; -
FIG. 7 is a schematic diagram of mounting of a connector in an upper housing of the cooker hood inFIG. 5 ; -
FIG. 8 is a front perspective view of a cooker hood according to a third embodiment of the present invention; and -
FIG. 9 is a schematic three-dimensional view of a lower housing of the cooker hood inFIG. 8 . - 1: Cooker hood; 10: Upper housing; 101: First part of the upper housing; 102: Second part of the upper housing; 10a: Air inlet of the upper housing; 10b: Air outlet of the upper housing; 11: Fan; 111: Volute; 11a: Air intake vent of the fan; 11b: Air exhaust vent of the fan; 12: Air guide pipe; 12a: Air intake vent of the air guide pipe; 12b: Air exhaust vent of the air guide pipe; 13: External air guide pipe; 14: Flow guide plate; 15: First thin plate; 16: Fan separator; 161: Opening of the fan separator; 17: Annular sealing plate; 17a: Lower opening of the annular sealing plate; 17b: Upper opening of the annular sealing plate; 18: Third thin plate; 20: Lower housing; 20a: Air intake surface; 20b: Air exhaust surface; 201: Left air intake portion; 202: Right air intake portion; 203: Air exhaust portion; 21: Left air intake pipe; 22: Right air intake pipe; 231: Left air exhaust pipe; 232: Right air exhaust pipe; 23: Three-way air exhaust pipe; 24: Second thin plate; 201a: Left air intake opening; 202a: Right air exhaust opening; 203b: Air exhaust opening; 21c: Left middle hole; 22c: Right middle hole; 30: Housing; 31: First separator; and 32: Second separator.
- To make the objectives, features, and beneficial effects of the present invention more obvious and easier to understand, the following describes specific embodiments of the present invention in detail with reference to the accompanying drawings.
- Referring to
FIG. 1 to FIG. 3 , a low-noise cooker hood 1 is provided, which includes ahousing 30, afan 11 and anair guide pipe 12. Thehousing 30 includes anupper housing 10 and alower housing 20, and afirst separator 31 is mounted between theupper housing 10 and thelower housing 20. In this embodiment, thefan 11 and theair guide pipe 12 are both mounted in theupper housing 10 of thehousing 30. However, the fan and the air guide pipe are not limited to be mounted only in the upper housing, and may be mounted in the lower housing. Afirst part 101 and asecond part 102 are included in theupper housing 10 inFIG. 3 to better present a mounting structure in theupper housing 10. - The
upper housing 10 has anair inlet 10a and anair outlet 10b. Thefan 11 has an air intake vent 11a and anair exhaust vent 11b, where theair exhaust vent 11b of the fan is aligned with theair outlet 10b of theupper housing 10. Theair guide pipe 12 has anair intake vent 12a and anair exhaust vent 12b, where theair intake vent 12a of theair guide pipe 12 is aligned with theair inlet 10a of theupper housing 10, and theair exhaust vent 12b of theair guide pipe 12 is connected to the air intake vent 11a of thefan 11. Sucked smoke enters theair guide pipe 12 through theair intake vent 12a of theair guide pipe 12 when thefan 11 of thecooker hood 1 works, enters thefan 11 through theair guide pipe 12, and is finally exhausted outside theupper housing 10 through theair exhaust vent 11b of thefan 11. - A pipe wall of the
air guide pipe 12 is provided with a plurality of acoustic attenuation micro holes. When thecooker hood 1 runs, and when noise of the smoke passes through theair guide pipe 12, the noise leaks out of the acoustic attenuation micro holes on theair guide pipe 12, and the noise is reflected in space between the pipe wall of theair guide pipe 12 and theupper housing 10 back and forth for a plurality of times and is reduced after being reflected for the plurality of times, thereby achieving an effect of reducing the noise of thecooker hood 1. - Referring to
FIG. 2 andFIG. 3 , thecooker hood 1 further includes afan separator 16 mounted in theupper housing 10, thefan separator 16 separates theupper housing 10 into two chambers, and thefan 11 and theair guide pipe 12 are in the two chambers separately. Thefan separator 16 has anopening 161, and an air intake vent 11a of thefan 11 and anair exhaust vent 12b of theair guide pipe 12 are respectively aligned with theopening 161 on thefan separator 16. - Referring to
FIG. 3 , thefan 11 has avolute 111, and the surface of thevolute 111 is provided with a plurality of acoustic attenuation micro holes. Noise generated when thefan 11 works leaks out of the acoustic attenuation micro holes on the surface of thevolute 111, is reflected in space between thevolute 111 and theupper housing 10 back and forth, and is reduced after being reflected for a plurality of times, thereby achieving an effect of reducing the noise. - An external
air guide pipe 13 is further mounted in theupper housing 10, and the externalair guide pipe 13 is sleeved outside theair guide pipe 12. A pipe wall of the externalair guide pipe 13 is provided with a plurality of acoustic attenuation micro holes. After the noise of the smoke leaks out of the acoustic attenuation micro holes of theair guide pipe 12, a part of the noise is reflected in space between theair guide pipe 12 and the externalair guide pipe 13 back and forth, and the other part of the noise leaks out of the acoustic attenuation micro holes of the externalair guide pipe 13 and is reflected back and forth in space between the externalair guide pipe 13 and theupper housing 10. Compared with using a single air guide pipe, using two layers of air guide pipes can improve a noise reduction effect. -
Flow guide plates 14 are mounted in theair guide pipe 12, and theflow guide plates 14 dispersedly suck the smoke in theair guide pipe 12, to avoid that the smoke centers on a middle part of theair guide pipe 12 and is rare on two sides of theair guide pipe 12, so that the smoke generates an even pressure to theair guide pipe 12. The surface of eachflow guide plate 14 is provided with a plurality of acoustic attenuation micro holes. When passing through theflow guide plate 14, the noise of the smoke leaks out of the acoustic attenuation micro holes of theflow guide plate 14 and is reflected between neighboringflow guide plates 14 back and forth. In this embodiment, threeflow guide plates 14 are mounted in theair guide pipe 12, and more flow guide plates may be used in an air guide pipe in another embodiment. - First
thin plates 15 are further mounted in theair guide pipe 12, and the firstthin plates 15 are located below theflow guide plate 14. When entering theair guide pipe 12 from theair intake vent 12a of theair guide pipe 12, the smoke first passes through a narrow gap formed between neighboring firstthin plates 15, so that a speed of the smoke can be reduced, to prevent the smoke from striking theair guide pipe 12. The surface of each firstthin plate 15 is provided with a plurality of attenuation micro holes. When passing through the firstthin plate 15, the noise of the smoke leaks out of the acoustic attenuation micro holes of the firstthin plate 15 and is reflected between neighboring firstthin plates 15 back and forth. In this embodiment, the neighboring firstthin plates 15 are parallel to each other, and the surface of the firstthin plate 15 is a curved surface and a cross-section thereof is "S" shaped. The noise is reflected on the "S" shaped surface for a plurality of times when passing through the firstthin plate 15 having the "S" shaped cross-section, thereby achieving a better noise reduction effect. In another embodiment, first thin plates may not be parallel to each other, and the surface of the first thin plate may be a plane. - Referring to
FIG. 2 andFIG. 4 , thehousing 30 is divided into two parts, and includes anupper housing 10 and alower housing 20. Theupper housing 10 has anair inlet 10a and anair outlet 10b. Thelower housing 20 has anair intake surface 20a and anair exhaust surface 20b, and theair intake surface 20a is used for facing a cooktop that generates smoke, and theair exhaust surface 20b is used for connecting to theupper housing 10. Theair intake surface 20a has a leftair intake opening 201a and a rightair exhaust opening 202a, theair exhaust surface 20b has anair exhaust opening 203b, and theair inlet 10a of theupper housing 10 is connected to theair exhaust opening 203b of thelower housing 20. In this embodiment, theair exhaust surface 20b of thelower housing 20 is parallel to the horizontal plane, and an angle is formed between theair intake surface 20a and the horizontal plane. - The smoke is sucked from the left
air intake opening 201a or the rightair intake opening 202a after thefan 11 starts working, flows out of theair exhaust opening 203b to enter theair guide pipe 12 of theupper housing 10, then enters thefan 11 through theair guide pipe 12, and finally is exhausted outside thecooker hood 1 by thefan 11 through theair exhaust vent 11b of thefan 11. - Still referring to
FIG. 1 and with reference toFIG. 4 , thelower housing 20 includes a leftair intake portion 201, a rightair intake portion 202 and anair exhaust portion 203. The leftair intake portion 201 is provided with the leftair intake opening 201a; the rightair intake portion 202 is provided with the rightair intake opening 202a; theair exhaust portion 203 is located between the leftair intake portion 201 and the rightair intake portion 202, a cavity of theair exhaust portion 203 is in communication with a cavity of the leftair intake portion 201 through a leftmiddle hole 21c and in communication with a cavity of the rightair intake portion 202 through a rightmiddle hole 22c, and theair exhaust portion 203 is provided with theair exhaust opening 203b. - The
air exhaust portion 203 is further mounted with a leftair exhaust pipe 231 and a rightair exhaust pipe 232, one end of the leftair exhaust pipe 231 is connected to the leftmiddle hole 21c between the leftair intake portion 201 and theair exhaust portion 203, the other end is connected to theair exhaust opening 203b of theair exhaust portion 203, and the smoke enters from the leftmiddle hole 21c and flows out to theupper housing 10 through theair exhaust opening 203b. Correspondingly, two ends of the rightair exhaust pipe 232 are respectively connected to the rightmiddle hole 22c between the rightair intake portion 202 and theair exhaust portion 203 and theair exhaust opening 203b of theair exhaust vent 203, and the smoke enters from the rightmiddle hole 22c and flows out to theupper housing 10 through theair exhaust opening 203b. - A pipe wall of the left
air exhaust pipe 231 and a pipe wall of the rightair exhaust pipe 232 are provided with a plurality of acoustic attenuation micro holes. When the noise of the smoke passes through the leftair exhaust pipe 231 and the rightair exhaust pipe 232 after entering theair exhaust portion 203, the noise leaks out of the acoustic attenuation micro holes of the leftair exhaust pipe 231 and the rightair exhaust pipe 232 and is reflected in space between the pipe wall of the leftair exhaust pipe 231, the pipe wall of the rightair exhaust pipe 232 and theair exhaust portion 203 back and forth for a plurality of times, to achieve an effect of reducing the noise. - In addition, the left
air intake portion 201 is mounted with a leftair intake pipe 21, and two ends of the leftair intake pipe 21 are respectively connected to the leftair intake opening 201a and the left middle 21c between the leftair intake portion 201 and theair exhaust portion 203. The rightair intake portion 202 is mounted with a rightair intake pipe 22, and two ends of the rightair intake pipe 22 are respectively in communication with the rightair intake opening 202a and the rightmiddle hole 22c between the rightair intake portion 202 and theair exhaust portion 203. - Pipe walls of the left
air intake pipe 21 and the rightair intake pipe 22 are provided with a plurality of acoustic attenuation micro holes. When the noise of the smoke passes through theleft intake pipe 21 or the rightair intake pipe 22 after entering the leftair intake portion 201 or the rightair intake portion 202, the noise leaks out of the acoustic attenuation micro holes of the leftair intake pipe 21 or the rightair intake pipe 22 and is reflected in space between theleft intake pipe 21 and the leftair intake portion 201 or space between the rightair intake pipe 22 and the rightair intake portion 202 back and forth for a plurality of times, to achieve an effect of reducing the noise. - Referring to
FIG. 5 andFIG. 6 , in this embodiment, alower housing 20 of a low-noise cooker hood 2 includes a leftair intake portion 201, a rightair intake portion 202 and anair exhaust portion 203. Theair exhaust portion 203 is mounted with a three-wayair exhaust pipe 23, a first air intake port of the three-wayair exhaust pipe 23 is connected to a leftmiddle hole 21c between the leftair intake portion 201 and theair exhaust portion 203, a second air intake port is connected to a rightmiddle hole 22c between the rightair intake portion 202 and theair exhaust portion 203, and an air exhaust port is connected to anair exhaust opening 203b of theair exhaust portion 203. Smoke enters the three-wayair exhaust pipe 23 from the leftmiddle hole 21c or the rightmiddle hole 22c, and flows to theupper housing 10 through theair exhaust opening 203b of the air exhaust portion 230. - In addition, the three-way
air exhaust pipe 23 is further mounted with secondthin plates 24, where the surface of each secondthin plate 24 is provided with a plurality of acoustic attenuation micro holes. When passing through the secondthin plate 24, the noise of the smoke leaks out of the acoustic attenuation micro holes on the secondthin plate 24 and is reflected between neighboring secondthin plates 24 back and forth. In this embodiment, the neighboring secondthin plates 24 are parallel to each other, and the surface of the secondthin plate 24 is a flat surface. In another embodiment, the second thin plates may not be parallel to each other, and the surface of the second thin plate may be a curved surface of which a cross-section is "S" shaped. - Referring to
FIG. 7 and with reference toFIG. 5 , a connector is mounted between the air exhaust port of the three-wayair exhaust pipe 23 and theair exhaust opening 203b, and the connector includes asecond separator 32, anannular sealing plate 17 and a plurality of thirdthin plates 18. Thesecond separator 32 is mounted between the air exhaust port of the three-wayair exhaust pipe 23 and theannular sealing plate 17. Thesecond separator 32 has anopening 32a that is made to be aligned with the air exhaust port of the three-wayair exhaust pipe 23. Theannular sealing plate 17 has anupper opening 17b and alower opening 17a, thelower opening 17a thereof is aligned with theopening 32a of thesecond separator 32, and theupper opening 17b thereof is aligned with anair inlet 10a of theupper housing 10. The thirdthin plates 18 are mounted parallel to each other in theannular sealing plate 17. Peripheral walls of theannular sealing plate 17 and the surface of the thirdthin plate 18 are all provided with a plurality of acoustic attenuation micro holes. When passing through theannular sealing plate 17 and the thirdthin plate 18, the noise leaks out of the acoustic attenuation micro holes of theannular sealing plate 17 and the thirdthin plate 18 and is reflected in space of theannular sealing plate 17 back and forth for a plurality of times, thereby achieving an effect of reducing the noise. - Referring to
FIG. 8 andFIG. 9 , in this embodiment, ahousing 30 of a low-noise cooker hood 3 is divided into two parts, and includes anupper housing 10 and alower housing 20. Thelower housing 20 has anair intake surface 20a and anair exhaust surface 20b, and theair intake surface 20a is used for facing a cooktop that generates smoke, and theair exhaust surface 20b is used for connecting to theupper housing 10. Theair intake surface 20a has a leftair intake opening 201a and a rightair exhaust opening 202a, theair exhaust surface 20b has anair exhaust opening 203b, and anair inlet 10a of theupper housing 10 is connected to theair exhaust opening 203b of thelower housing 20. In this embodiment, theair exhaust surface 20b of thelower housing 20 is parallel to the horizontal plane, and theair intake surface 20a is also parallel to the horizontal plane. - In the present invention, all the embodiments use a progressive writing method and emphasize differences from a foregoing embodiment. For same parts of the embodiments, refer to the foregoing embodiment.
- Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art may make various changes and modifications without departing from the scope of the present invention, as defined in the appended claims.
Claims (11)
- A cooker hood (1), comprising:a housing (30); anda fan (11) mounted in the housing (30), wherein the fan (11) comprises an air intake vent (11a) and an air exhaust vent (11b),whereinthe cooker hood (1) further comprises an air guide pipe (12) mounted in the housing (30), wherein the air guide pipe (12) comprises an air intake vent (12a) and an air exhaust vent (12b), and the air exhaust vent (12b) of the air guide pipe is connected to the air intake vent (11a) of the fan;a pipe wall of the air guide pipe (12) is provided with acoustic attenuation micro holes characterized in thatthe housing (30) comprises:an upper housing (10), wherein the upper housing (10) comprises an air inlet (10a) and an air outlet (10b), and the fan (11) and the air guide pipe (12) are mounted in the upper housing (10); anda lower housing (20), wherein the lower housing (20) comprises left and right air intake openings (201a and 202a) and an air exhaust opening (203b), and the air inlet (10a) of the upper housing is connected to the air exhaust opening (203b) of the lower housing, andthe cooker hood (1) further includes: a fan separator (16) mounted in the upper housing (10), where the fan separator (16) separates the fan (11) from the air guide pipe (12), so that the fan (11) and the air guide pipe (12) are in two chambers of the upper housing (10).
- The cooker hood according to claim 1, characterized in that the fan (11) comprises a volute (111), and the surface of the volute (111) is provided with acoustic attenuation micro holes.
- The cooker hood according to claim 1 or 2, characterized by further comprising an external air guide pipe (13), wherein the external air guide pipe (13) is mounted in the housing (30) and is sleeved outside the air guide pipe (12), and a pipe wall of the external air guide pipe (13) is provided with acoustic attenuation micro holes.
- The cooker hood according to any of the preceding claims, characterized by further comprising a plurality of flow guide plates (14), wherein the flow guide plate (14) is mounted in the air guide pipe (12), and the surface of the flow guide plate (14) is provided with acoustic attenuation micro holes.
- The cooker hood according to claim 4, characterized by further comprising a plurality of first thin plates (15), wherein the first thin plate (15) is mounted in the air guide pipe (12) and is located below the flow guide plate (14), and the surface of the first thin plate (15) is provided with acoustic attenuation micro holes.
- The cooker hood according to anyone of claims 1 to 5, characterized in that the lower housing (20) comprises:a left air intake portion (201), wherein the left air intake portion is provided with the left air intake opening (201a);a right air intake portion (202), wherein the right air intake portion is provided with the right air intake opening (202a); andan air exhaust portion (203), wherein the air exhaust portion (203) is provided with an air exhaust opening (203b), the air exhaust portion (203) is located between the left air intake portion (201) and the right air intake portion (202), and a cavity of the air exhaust portion (203) is respectively in communication with a cavity of the left air intake portion (201) and a cavity of the right air intake portion (202).
- The cooker hood according to claim 6, characterized by further comprising a left air exhaust pipe (231) and a right air exhaust pipe (232) that are mounted in the air exhaust portion (203), wherein the left air exhaust pipe (231) is respectively connected to the cavity of the left air intake portion (201) and the air exhaust opening (203b), the right air exhaust pipe (232) is respectively connected to the cavity of the right air intake portion (202) and the air exhaust opening (203b), and pipe walls of the left air exhaust pipe (231) and the right air exhaust pipe (232) are provided with acoustic attenuation micro holes.
- The cooker hood according to claim 6, characterized in that a three-way air exhaust pipe (23) is mounted in the cavity of the air exhaust portion (203); the three-way air exhaust pipe (23) is respectively connected to the cavity of the left air intake portion (201), the cavity of the right air intake portion (202), and the air exhaust opening (203b); and a pipe wall of the three-way air exhaust pipe (23) is provided with acoustic attenuation micro holes.
- The cooker hood according to claim 8, characterized by further comprising a plurality of second thin plates (24), wherein the second thin plate (24) is mounted in the three-way air exhaust pipe (23), and the second thin plate (24) is provided with acoustic attenuation micro holes.
- The cooker hood according to any one of claims 7 to 9, characterized in that a left air intake pipe (21) is mounted in the left air intake portion (201), the left air intake pipe (21) is respectively connected to the left air intake opening (201a) and the cavity of the air exhaust portion (203), and a pipe wall of the left air intake pipe (21) is provided with acoustic attenuation micro holes.
- The cooker hood according to any one of claims 7 to 10, characterized in that a right air intake pipe (22) is mounted in the right air intake portion (202), the right air intake pipe (22) is respectively connected to the right air intake opening (202a) and the cavity of the air exhaust portion (203), and a pipe wall of the right air intake pipe (22) is provided with acoustic attenuation micro holes.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201710504580.1A CN109140547A (en) | 2017-06-27 | 2017-06-27 | Range hood |
Publications (2)
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EP3421891A1 EP3421891A1 (en) | 2019-01-02 |
EP3421891B1 true EP3421891B1 (en) | 2021-01-27 |
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EP18176223.8A Active EP3421891B1 (en) | 2017-06-27 | 2018-06-06 | Cooker hood |
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CN (1) | CN109140547A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN111765123A (en) * | 2019-04-01 | 2020-10-13 | 博西华电器(江苏)有限公司 | Range hood's fan and range hood |
US11573010B2 (en) | 2019-10-28 | 2023-02-07 | Lg Electronics Inc. | Self-cleaning kitchen hood |
CN113729535B (en) * | 2020-05-27 | 2023-09-08 | 厦门优胜卫厨科技有限公司 | Drying device of electronic toilet |
CN113108345B (en) * | 2021-04-21 | 2022-05-17 | 宁波方太厨具有限公司 | Range hood, working method of range hood and kitchen appliance |
CN113217966B (en) * | 2021-05-31 | 2022-10-21 | 宁波方太厨具有限公司 | Range hood and control method thereof |
CN113719872B (en) * | 2021-08-31 | 2023-05-26 | 宁波方太厨具有限公司 | Range hood and control method thereof |
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US3364664A (en) * | 1964-07-20 | 1968-01-23 | Cockle Ventilator Company Inc | Grease extractor for ventilating systems |
JPH06201172A (en) * | 1993-01-07 | 1994-07-19 | Matsushita Seiko Co Ltd | Filter for range hood |
CN2656683Y (en) * | 2003-11-06 | 2004-11-17 | 宁波方太厨具有限公司 | Noise reducing casing for kitchen ventilator |
FR2911520B1 (en) * | 2007-01-19 | 2009-08-28 | Roblin Sas Soc Par Actions Sim | HOOD ASPIRING FOR KITCHEN |
CN101457946B (en) * | 2007-12-11 | 2010-11-24 | 宁波方太厨具有限公司 | Bionic micropore noise reduction structure for smoke exhaust system |
CN201242205Y (en) * | 2008-07-04 | 2009-05-20 | 袁庆堂 | Low-noise cooking fume exhauster |
CN102042628B (en) * | 2011-01-10 | 2012-08-22 | 宁波方太厨具有限公司 | Range hood with flow-stabilizing and noise-reducing structure |
CN201925993U (en) * | 2011-01-10 | 2011-08-10 | 宁波方太厨具有限公司 | Range hood with current-stabilization noise-reduction structure |
JP6413095B2 (en) * | 2013-09-02 | 2018-10-31 | パナソニックIpマネジメント株式会社 | Range food |
CN203628765U (en) * | 2013-11-30 | 2014-06-04 | 宁波方太厨具有限公司 | Mute type range hood |
US9121174B1 (en) * | 2014-05-23 | 2015-09-01 | Hwa-Yi Ventilation Co., Ltd. | Foldable sound attenuator |
CN106051872B (en) * | 2016-07-22 | 2018-07-17 | 宁波方太厨具有限公司 | A kind of range hood |
IT201600102040A1 (en) * | 2016-10-11 | 2018-04-11 | Elica Spa | Extraction hood for cooking fumes. |
-
2017
- 2017-06-27 CN CN201710504580.1A patent/CN109140547A/en active Pending
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2018
- 2018-06-06 EP EP18176223.8A patent/EP3421891B1/en active Active
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CN109140547A (en) | 2019-01-04 |
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