CN209026911U - A kind of range hood with denoising structure - Google Patents
A kind of range hood with denoising structure Download PDFInfo
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- CN209026911U CN209026911U CN201821566935.6U CN201821566935U CN209026911U CN 209026911 U CN209026911 U CN 209026911U CN 201821566935 U CN201821566935 U CN 201821566935U CN 209026911 U CN209026911 U CN 209026911U
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- noise
- noise reduction
- film
- range hood
- denoising structure
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Abstract
A kind of range hood with denoising structure, including outlet housing, outlet conduit is connected at the top of the outlet housing, it is characterized by: being provided with denoising structure on the outside of the peripheral wall of the outlet conduit, the denoising structure includes noise reduction module and film, the noise reduction module includes shell, noise reduction channel is formed in the shell, the noise reduction channel is in bending, the junction of the peripheral wall of the noise reduction channel and outlet conduit constitutes noise ingress, the junction of the peripheral wall of the noise reduction channel and outlet conduit constitutes noise outlet, the film includes the first film being arranged at noise ingress and the second film in the setting of noise exit.By adding membrane noise reduction module on range hood outlet conduit wall, noise is made to generate phase difference using channel curved in noise reduction module, to reduce the high-frequency noises in range hood noise, the resistance in air duct is not will increase simultaneously, noise is reduced to sacrifice air quantity, to promote user experience.
Description
Technical field
The utility model relates to cooking apparatus, especially a kind of range hood with denoising structure.
Background technique
Domestic cooking fume remover is at work due to impeller high speed rotation, so that generating vibration noise, pneumatic in blower fan system
The noises such as noise, some is passed out these noises by air inlet of kitchen ventilator channel, is brought to user bad
Experience.
Existing noise reduction measure is generally added by position opposite with blower in blower or in the shell of range hood
Acoustical cotton progress noise reduction, a kind of noise reduction range hood as disclosed in the Chinese patent application No. is 201610695719.0, including
Body and exhaust fume collecting hood, body is interior to be equipped with smoke inlet and flue, and the denoising draught fan of connection smoke inlet and flue is equipped in exhaust fume collecting hood, is dropped
Blower of making an uproar includes casing, and casing internal includes axial flow blower, and the side of casing is wind inlet, and the other side is wind outlet, wind inlet
Increase acoustical cotton with wind exit；A kind of for another example side-suction type oil disclosed in the Chinese patent application No. is 201710175112.4
The front side of smoke machine, including shell, fan assembly and pod, shell is opened wide to limit smoke inlet, and fan assembly is located at shell
Interior, water conservancy diversion is located at smoke inlet by air conducting to fan assembly, to further include top panel and lower panel, top panel and following
Plate is located at the front side of shell at interval up and down, sound absorption cavity is limited between the inner surface and pod of lower panel, for absorbing
The sound-absorbing packet of noise is located in sound absorption cavity, and sound-absorbing packet includes microwell plate and sound-absorbing material, and sound-absorbing material is acoustical cotton.
By the way of above-mentioned acoustical cotton noise reduction, relatively good noise reduction effect can be generally being obtained at the beginning, but with
The long-time service of range hood, acoustical cotton can accumulate a large amount of greasy dirt, to influence noise reduction effect, and the material of acoustical cotton is led
It causes the greasy dirt of accumulation to be difficult to clean, thus user is needed to regularly replace, influence user experience.
Utility model content
Technical problem to be solved in the utility model is in view of the above-mentioned problems of the prior art, providing one kind ensures
Absorbing sound and lowering noise effect, the range hood with denoising structure to prolong the service life.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of fume-exhausting with denoising structure
Machine, including outlet housing are connected with outlet conduit at the top of the outlet housing, it is characterised in that: outside the peripheral wall of the outlet conduit
Side is provided with denoising structure, and the denoising structure includes noise reduction module and film, and the noise reduction module includes shell, the shell
Inside it is formed with noise reduction channel, the noise reduction channel is in bending, the junction structure of the peripheral wall of the noise reduction channel and outlet conduit
At noise ingress, the junction of the peripheral wall of the noise reduction channel and outlet conduit constitutes noise outlet, and the film, which is included in, makes an uproar
The first film of sound inlet setting and the second film being arranged in noise exit.
Middle line in the noise reduction channel is L1, and the outlet conduit is interior, noise sound wave is exported from noise ingress to noise
Propagation path be L2, the length of L1 is greater than the length of L2.
The difference of L1 and L2 is the 1/2 of the wavelength for the high-frequency noises that initial designs are directed to.
The ratio of the wavelength for the high-frequency noises that the equivalent caliber and initial designs in the noise reduction channel are directed to is 1:20.
The equivalent caliber in the noise reduction channel is 17mm.
The area of the first film and the second film is 200mm2。
The noise reduction channel is bent waviness, and for wavy wave crest far from outlet conduit, wavy trough is then close
Outlet conduit.
Each knee rounding off in the noise reduction channel.
The material of the first film and the second film is metal, rubber or plastics.
The first film and the second film are coated with oleophobic coating towards in outlet conduit on one side.
Compared with the prior art, the advantages of the utility model are: by adding band on range hood outlet conduit wall
The noise reduction module of film makes noise generate phase difference, makes an uproar to reduce range hood using channel curved in noise reduction module
High-frequency noises in sound, while not will increase the resistance in air duct, noise is reduced to sacrifice air quantity, to promote user's body
It tests；In addition, there is the protection of film, it can keep cleaning inside noise reduction module, and film easy cleaning, can use for a long time
Without failing.
Detailed description of the invention
Fig. 1 is the schematic diagram of the range hood of the utility model embodiment；
Fig. 2 is the decomposition texture schematic diagram of the range hood of the utility model embodiment；
Fig. 3 is the cross-sectional view of the range hood of the utility model embodiment；
Fig. 4 is the cross-sectional view of the denoising structure of the range hood of the utility model embodiment.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
Referring to figs. 1 to 4, a kind of range hood with denoising structure, including exhaust fume collecting hood 1, above exhaust fume collecting hood 1
Cabinet 2, the blower 3 being arranged in cabinet 2 are provided with outlet housing 4 at the air outlet of blower 3.
It is formed with the smoke collecting chamber 11 being recessed upwards in exhaust fume collecting hood 1, the top of exhaust fume collecting hood 1 is formed with for oil smoke from smoke collecting chamber 11
Enter the air inlet 12 in cabinet 2.
Air intake cover 5 is provided between the top and cabinet 2 of exhaust fume collecting hood 1, the bottom of air intake cover 5 and the top of exhaust fume collecting hood 1 connect
It connects, the top of air intake cover 5 is connect with the bottom of cabinet 2, is formed in hollow in air intake cover 5 and is connected to air inlet 12 with cabinet 2
Air intake passage 51.Oil smoke can enter cabinet 2 after the entrance of smoke collecting chamber 11, through air inlet 12 and air intake passage 51 as a result,
It is interior, under the action of blower 3 in cabinet 2, it is discharged by outlet housing 4.
The top of outlet housing 4 is connected with outlet conduit 7, is provided with denoising structure 6 on the outside of the peripheral wall of outlet conduit 7, at this
In embodiment, denoising structure 6 includes six, is circumferentially uniformly distributed on the peripheral wall of outlet conduit 7.Each denoising structure 6 wraps
Include noise reduction module 61 and film.
Noise reduction module 61 includes shell 611, noise reduction channel 612 is formed in shell 611, noise reduction channel 612 is in bending
Shape, it is preferred that bending waviness, wavy wave crest far from outlet conduit 7, wavy trough then close to outlet conduit 7,
Each knee rounding off in noise reduction channel 612 has some setbacks or even prior reflection to prevent sound wave transmitting.
The both ends in noise reduction channel 612 are connect with the peripheral wall of outlet conduit 7 respectively, the both ends in noise reduction channel 612 with outlet
The junction of pipeline 7 is open (noise reduction channel and air intake cover 5 are open) and respectively constitutes noise ingress 6121 and noise outlet
6122。
Film includes the first film 621 for the conduction vibration better performances being arranged at noise ingress 6121, noise outlet
Second film 622 of the conduction vibration better performances being arranged at 6122.Noise passes through the first film 621 at noise ingress 6121
It imported into denoising structure 6 and carries out reflection transmitting, and be passed back in outlet conduit 7 by the second film 622, thus relative to going out
Noise in mouth pipeline 7 has phase difference, when phase difference is the odd-multiple of wave length of sound 1/2, will make making an uproar for the frequency
Sound declines to a great extent.
Due in range hood outlet conduit 7 mainly by high-speed flow flowing generate aerodynamic noise, it is generated in
High-frequency noise focuses primarily upon 1000Hz~5000Hz, therefore the initial designs noise reduction frequency of denoising structure 6 is 1000Hz, right
The noise of frequency range has reduction effect near 1000Hz, 3000Hz, 5000Hz, therefore the middle height of range hood can be effectively reduced
Frequency noise.
Under one atmospheric pressure, when temperature is at 20 DEG C, the aerial spread speed of sound is about 340m/s, 1000Hz's
The wavelength of noise is 340mm, as shown in figure 4, channel path (middle line) in noise reduction channel 612 is L1, noise ingress 6121 (in
Between) to export the straightway between 6121 (centre) to noise be L2, i.e. L2 is that outlet conduit 7 is interior, noise sound wave is from noise ingress
6121 export 6122 propagation path to noise, and the length of L1 is greater than the length of L2, and difference 170mm is 1000Hz noise waves
Long 1/2.
The equivalent caliber and initial designs in the noise reduction channel 612 (longitudinal cross-section is rectangle or square) of noise reduction module 61
For the ratio of noise wavelength be 1:20 or so, preferably 17mm.The longer noise reduction frequency range in noise transmission path is closer to low
Frequently, need bigger film size to transmit low-frequency noise；Otherwise noise transmission path is shorter, noise reduction frequency range closer to high frequency,
Need the film transfer high-frequency noise compared with small area.Preferably, the area of the first film 621 and the second film 622 is each about
200mm2, 1000Hz~5000Hz frequency noise can be effectively conducted.
Since the vibration frequency of high-frequency noise is higher, wavelength is shorter, it is therefore desirable to transmit in elongated tubular, to not make sound
Wave transmitting distortion.
The material of the first film 621 and the second film 622 can be metal, rubber, plastics or other composite materials, often
A pellicular front is coated with oleophobic coating when (contacting with oil smoke while) towards air intake passage 53.
Noise reduction module is mounted on the side wall of outlet conduit 7 by screw, to replace each film.
Sheath 8 is provided with outside denoising structure 6.
Claims (10)
1. a kind of range hood with denoising structure, including outlet housing (4), outlet is connected at the top of the outlet housing (4)
Pipeline (7), it is characterised in that: be provided with denoising structure (6) on the outside of the peripheral wall of the outlet conduit (7), the denoising structure (6)
Including noise reduction module (61) and film, the noise reduction module (61) includes shell (611), is formed with drop in the shell (611)
It makes an uproar channel (612), the noise reduction channel (612) is in bending, the noise reduction channel (612) and the peripheral wall of outlet conduit (7)
Junction constitutes noise ingress (6121), and the junction of the peripheral wall of the noise reduction channel (612) and outlet conduit (7) constitutes noise
It exports (6122), the film is included in the first film (621) being arranged at noise ingress (6121) and exports in noise
(6122) the second film (622) being arranged at.
2. the range hood according to claim 1 with denoising structure, it is characterised in that: the noise reduction channel (612)
Interior middle line is L1, in the outlet conduit (7), noise sound wave the propagation of (6122) is exported from noise ingress (6121) to noise
Path is L2, and the length of L1 is greater than the length of L2.
3. the range hood according to claim 2 with denoising structure, it is characterised in that: the difference of L1 and L2 is initial
Design the 1/2 of the wavelength for the high-frequency noises being directed to.
4. the range hood according to claim 3 with denoising structure, it is characterised in that: the noise reduction channel (612)
Equivalent caliber and the ratio of the wavelength of high-frequency noises that is directed to of initial designs be 1:20.
5. the range hood according to claim 4 with denoising structure, it is characterised in that: the noise reduction channel (612)
Equivalent caliber be 17mm.
6. the range hood according to claim 4 with denoising structure, it is characterised in that: the first film (621)
Area with the second film (622) is 200mm2。
7. the range hood according to claim 1 with denoising structure, it is characterised in that: the noise reduction channel (612)
It is bent waviness, wavy wave crest is far from outlet conduit (7), and wavy trough is then close to outlet conduit (7).
8. with the range hood of denoising structure described according to claim 1~any one of 6, it is characterised in that: the drop
It makes an uproar each knee rounding off in channel (612).
9. with the range hood of denoising structure described according to claim 1~any one of 6, it is characterised in that: described the
The material of one film (621) and the second film (622) is metal, rubber or plastics.
10. with the range hood of denoising structure described according to claim 1~any one of 6, it is characterised in that: described the
One film (621) and the second film (622) are coated with oleophobic coating towards in outlet conduit (7) on one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821566935.6U CN209026911U (en) | 2018-09-22 | 2018-09-22 | A kind of range hood with denoising structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821566935.6U CN209026911U (en) | 2018-09-22 | 2018-09-22 | A kind of range hood with denoising structure |
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| Publication Number | Publication Date |
|---|---|
| CN209026911U true CN209026911U (en) | 2019-06-25 |
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ID=66904129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821566935.6U Active CN209026911U (en) | 2018-09-22 | 2018-09-22 | A kind of range hood with denoising structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374935A (en) * | 2019-08-05 | 2019-10-25 | 杭州老板电器股份有限公司 | A kind of smoke machine of smoke machine noise-reduction method, the device and application device |
| CN112484114A (en) * | 2020-11-16 | 2021-03-12 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN112484113A (en) * | 2020-11-16 | 2021-03-12 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
-
2018
- 2018-09-22 CN CN201821566935.6U patent/CN209026911U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110374935A (en) * | 2019-08-05 | 2019-10-25 | 杭州老板电器股份有限公司 | A kind of smoke machine of smoke machine noise-reduction method, the device and application device |
| CN112484114A (en) * | 2020-11-16 | 2021-03-12 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN112484113A (en) * | 2020-11-16 | 2021-03-12 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN112484114B (en) * | 2020-11-16 | 2022-02-18 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
| CN112484113B (en) * | 2020-11-16 | 2022-02-18 | 宁波方太厨具有限公司 | Noise reduction device, range hood applying noise reduction device and control method of range hood |
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