CN102072514A - Noise reducing method for range hood and low-noise range hood - Google Patents
Noise reducing method for range hood and low-noise range hood Download PDFInfo
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- CN102072514A CN102072514A CN 201110027274 CN201110027274A CN102072514A CN 102072514 A CN102072514 A CN 102072514A CN 201110027274 CN201110027274 CN 201110027274 CN 201110027274 A CN201110027274 A CN 201110027274A CN 102072514 A CN102072514 A CN 102072514A
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Abstract
The invention relates to a noise reducing method for a range hood and the corresponding low-noise range hood. A noise absorption material is arranged in the range hood. The range hood is characterized in that the outside of the noise absorption material is wrapped with a thin film. The noise absorption material is wrapped by adopting a thin film material so that the noise absorption material absorbs the noise and reduces the noise pollution of the range hood; the thin film material can prevent the noise absorption material from adhering grease when being used for a long term and prevents the noise absorption material from reducing the noise absorption effect due to the absorption of the grease; and at the same time, the thin film material prevents the noise absorption material from absorbing the grease and can prevent fire disasters, thereby enhancing the safety performance of the range hood and stopping the hidden danger of the fire disasters.
Description
Technical field
The present invention relates to a kind of noise-reduction method of range hood and the range hood of low noise.
Background technology
The family expenses range hood is used for the kitchen, and the flue gas that produces in the time of can getting rid of the cooking keeps cleaning and health in the kitchen, has become the requisite cooking apparatus of Modern Family.But the problem of bringing along with the use of range hood is the strong noise that is produced by blower fan, and long-term housewife and kitchen operation personnel under this noise can produce headache, agitation, bad reaction such as nervous, and healthy causing had a strong impact on.
The blower fan of range hood generally includes blower fan and installation blower fan and is provided with the spiral case of gas channel.Described blower fan is usually by motor-driven, and motor is connected with impeller by an axle.During use, cause vibrations, and resonate, and the friction bump of flow air also produces noise in the blower fan by housing is produced because the driven by motor draught fan impeller rotates.Therefore, the noise of range hood source comprises that mainly two aspects, first aspect are the noise of the noise of blower fan as the vibrations generation itself, and second aspect is a noise generated by air flow.
The noise reduction technology of present known range hood and method are the one side optimal design, improve the performance of blower fan, the noise and the vibration of blower fan self are descended, thereby reach the purpose that total noise of centrifuge descends, be the rigidity that improves the relevant parts of complete machine on the other hand, particularly the rigidity of sheet metal of outer cover spare suppresses the generation of its resonance noise.But these two aspects have all arrived the limit of technology, and noise reduction audio fruit neither be very desirable.
Therefore there are some range hoods to adopt sound-absorbing material, a kind of range hood that uses sound-absorbing material to absorb noise is disclosed as Chinese patent ZL200620165243.1, by sound-absorbing material being installed, absorb the noise that air-flow and blower fan itself produce, to reach the effect of noise reduction at gas channel.But sound-absorbing material is generally porous material, under smoke exhaust interior oil smoke pollution serious environmental, and very easily sticking tack coat dirt, even cause fire easily, form potential safety hazard; And in use long afterwards, the sound-absorbing material of porous because inspiration oil smoke, its noise reduction also descends greatly.
Summary of the invention
Technical problem to be solved by this invention provides the noise-reduction method and the low noise range hood of the range hood of a kind of excellent noise reduction effect and longer duration.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of noise-reduction method of range hood, and be included in and be provided with sound-absorbing material in the range hood, it is characterized in that: the outside at described sound-absorbing material coats thin film.Adopt film to coat sound-absorbing material, not only can guarantee the absorbing sound and lowering noise effect of range hood, and film can prevent in use between long afterwards sound-absorbing material adhere to the decline of the absorbing sound and lowering noise effect that oil smoke causes, film prevents that sound-absorbing material from sucking grease and can and then preventing the fire accident simultaneously.
In order to make described film can isolate sound-absorbing material and oil smoke better, described film adopts the oleophobic plastic; Preferably, described film adopts fluorinated ethylene propylene copolymer (FEP) or soluble poly tetrafluoroethene (PFA); The thickness 0.01mm-0.1mm of described film.
Preferably, described sound-absorbing material adopts acoustical cotton, foamed plastics, aluminum fiber cotton, single-layer polyester cellucotton, plant cellulose sprayed on material or centrifugally glass-wool; The thickness of described sound-absorbing material is 1cm-5cm.
As a preferred embodiment of the present invention, when the blower fan of described range hood was one, described sound-absorbing material and film were 5cm-20cm from the distance of described air inlet, are preferably 10cm.
As another preferred embodiment of the present invention, when the blower fan of described range hood was two, described sound-absorbing material and film were 5cm-15cm from the distance of described air inlet, are preferably 8cm.
In order to make this noise-reduction method reach best meeting point on cost and noise reduction, it is that 2cm, unit weight are the centrifugally glass-wool of 100kg/m3 that described sound-absorbing material adopts thickness, and it is the fluorinated ethylene propylene copolymer (FEP) of 0.03mm that described film adopts thickness.
A kind of low noise range hood, comprise housing, be installed on blower fan in the housing and the air-out mouth mask that is positioned at described case top, it is characterized in that: post the sound-absorbing assembly in the described housing on the sidewall of the air inlet of described blower fan and/or on the madial wall of described air-out mouth mask, described sound-absorbing assembly comprises sound-absorbing material and coats the film of described sound-absorbing material.
Preferably, described sound-absorbing material adopts acoustical cotton, foamed plastics, aluminum fiber cotton, single-layer polyester cellucotton, plant cellulose sprayed on material or centrifugally glass-wool, and the thickness of described sound-absorbing material is 1cm-5cm.
In order to make described film can isolate sound-absorbing material and oil smoke better, described film adopts the oleophobic plastic; Preferably, described film adopts fluorinated ethylene propylene copolymer (FEP) or soluble poly tetrafluoroethene (PFA), and the thickness of described film is 0.01mm-0.1mm.
As one embodiment of the present of invention, described blower fan is one, and described sound-absorbing assembly is 5cm-20cm from the distance of described air inlet, is preferably 10cm.
As an alternative embodiment of the invention, described blower fan is two, and described sound-absorbing assembly is 5cm-15cm from the distance of described air inlet, is preferably 8cm.
Compared with prior art, the invention has the advantages that and adopt thin-film material to coat sound-absorbing material, not only can make sound-absorbing material absorb the sound pollution that noise reduces range hood, and thin-film material can prevent that sound-absorbing material from adhering to grease long afterwards in use, prevent that sound-absorbing material from causing the decline of sound-absorbing effect because of sucking grease, and this thin-film material prevents that sound-absorbing material from sucking grease simultaneously, can also prevent the generation of fire, increase the security performance of this range hood, stopped the hidden danger of fire.And thin-film material makes sound-absorbing material be convenient to clean, and do not need often to change the effect that sound-absorbing material guarantees absorbing sound and lowering noise, provides cost savings.
Description of drawings
Fig. 1 is the schematic diagram of first embodiment of low noise range hood of the present invention.
Fig. 2 is the schematic diagram of second embodiment of low noise range hood of the present invention.
Fig. 3 is the schematic diagram of the 3rd embodiment of low noise range hood of the present invention.
Fig. 4 is the structural representation of the sound-absorbing assembly of low noise range hood of the present invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Shown in Fig. 1-4, low noise range hood of the present invention mainly comprises housing 7,7 ',, have cabinet 9,9 ' in the housing 7,7 ', have spiral case 10,10 ' and blower fan 3,3 ' in this cabinet 9,9 '.Spiral case 10,10 ' provides the air channel for blower fan 3,3 ', and have opening 8,8 ' on this spiral case 10,10 ' and be this blower fan 3,3 ' air inlet, this blower fan 3,3 ' comprises impeller and drives impeller motor rotating, motor rotates by the axle impeller, and range hood shell 7,7 ' top also have air-out mouth mask 2.
As shown in Figure 1, be the first embodiment of the present invention, on the sidewall of the air-out mouth mask 2 of this range hood, post sound-absorbing assembly 1.Shown in Fig. 2,3, Fig. 2 is the second embodiment of the present invention, it is the range hood of a back air inlet system, post sound-absorbing assembly 1 on the sidewall of the air inlet that faces this blower fan 38 of this cabinet 9, Fig. 3 is the third embodiment of the present invention, in the range hood of preceding air inlet system, post sound-absorbing assembly 1 near the air inlet 8 ' of blower fan 3 ', this sound-absorbing assembly 1 pastes at cabinet 9 ' and faces on the sidewall of air inlet 8 ' of this blower fan 3 '.Sound-absorbing assembly 1 as shown in Figure 4, comprise sound-absorbing material 5, and the film 6 that coats described sound-absorbing material 5, this film 6 can coat all outer surfaces of described sound-absorbing material 5, also can be under in order to be effective and the requirement that reduces cost, do not coat this sound-absorbing material 5 and paste surface on sidewall, only coat the outer surface that this sound-absorbing material 5 exposes.Owing to be coated with film in the outside of sound-absorbing material, can prevent to use long afterwards, sound-absorbing material 5 sucks the decline that grease causes sound-absorbing effect, and can prevent simultaneously that sound-absorbing material 5 from causing inflammable phenomenon because sucked grease, and the surface of sound-absorbing material is with film, also be convenient to clean, save cost, do not need often to change the effect that sound-absorbing material guarantees absorbing sound and lowering noise.
The acoustical cotton that described sound-absorbing material 5 can adopt, foamed plastics, aluminum fiber cotton, single-layer polyester cellucotton, plant cellulose sprayed on material etc. preferably, can be selected centrifugally glass-wool for use.The outer film 6 that coats can adopt perfluoroethylene copolymer (FEP), soluble poly tetrafluoroethene oleophobic plastic materials such as (PFA).The thickness of sound-absorbing material 5 is 1cm-5cm, and the thickness of film 6 is 0.01mm-0.1mm.Adopt film to coat centrifugally glass-wool when guaranteeing sound-absorbing effect steady in a long-term, also avoid the user to suffer another kind of harm, promptly glass fibre is to the pollution of air.Centrifugally glass-wool belongs to a classification in the glass fibre, is a kind of manmade inorganic fibre.Adopting natural crystals such as quartz sand, lime stone, dolomite is primary raw material, cooperates industrial chemicals such as some soda ash, borax to be melt into glass.Under melting state, get rid of into cotton-shaped fine fibre by the external force blowing produced, be between fiber and the fiber crossings on different level to be intertwined mutually, present many tiny gaps.This gap can be regarded hole as, the diameter of its monofilament be several micron to twenties meters microns, be equivalent to the 1/20-1/5 of a hairline, every bundle fiber precursor all is made up of hundreds of even thousands of monofilament.And the aerial floating material of glass fibre has certain harm to tracheae, respiratory tract generally speaking, also has the people who skin is also had certain stimulation, particularly allergic constitution.And the method by adopting film to coat is airtight with centrifugally glass-wool, just can avoid above harm.
Because sound-absorbing material 5 itself has microvoid, may suck the decline that grease causes sound-absorbing effect after service time is long.After the outside of sound-absorbing material 5 has coated film 6, coat with respect to no film, initial sound-absorbing effect is lower slightly, but after using above 100 hours, the sound-absorbing material that no film coats obviously descends because of having sucked a large amount of grease sound-absorbing effects, and has the sound-absorbing effect of the sound-absorbing material of film coating really not have obvious decline.As shown in table 1 below, be to the range hood that do not have sound-absorbing material and have the range hood of sound-absorbing material and result that the range hood of embodiments of the invention carries out the noise test.As can be seen from Table 1, maximum quantity of wind in test keeps under the essentially identical situation, though range hood of the present invention may be big slightly with respect to its noise of the range hood with sound-absorbing material under original state, but service time long afterwards, its noise will be far below the range hood with common sound-absorbing material, and therefore the noise reduction of low noise range hood of the present invention is effectively lasting more.
Table 1
And after having used 100 hours, the surface of the sound-absorbing material that no film coats is stained with a thick layer of greasy dirt, carry out the experiment of pin flame and be prone to phenomenon on fire, and the surface of the centrifugally glass-wool that film coats has any greasy dirt hardly, shows also that by the experiment of pin flame it is not flammable.
Studies have shown that by a large amount of experimental datas in common smoke exhaust ventilator, employing thickness is that 2cm, unit weight are 100kg/m
3Centrifugally glass-wool and the thickness FEP film that is 0.03mm coat, can reach the best meeting point of absorbing sound and lowering noise effect and cost.And after the thickness of centrifugally glass-wool surpassed 4cm, the lifting of absorbing sound and lowering noise effect just became slowly, almost no longer promoted; And the thickness of film can not be too big, and surpassing the thick fep film of 0.05mm can have a negative impact gradually to the effect of absorbing sound and lowering noise.Some optional examples that table 2 has been listed sound-absorbing assembly of the present invention with and test performance.
Table 2
Data when performance data is initial the use in the table 2 were used after 100 hours, and after tested, the noise of each example is all below 70dB.
Position for this sound-absorbing assembly installation, can be installed near the air inlet of blower fan, shown in Fig. 2,3, and for single blower fan, the sound-absorbing assembly can be placed on the place apart from air inlet 5cm-20cm, places the absorbing sound and lowering noise best results of this sound-absorbing assembly 1 at distance air inlet 10cm place; In two blower fans, the sound-absorbing assembly can be placed on the place apart from air inlet 5cm-15cm, is installed in the absorbing sound and lowering noise best results apart from air inlet 8cm place.Also can on the sidewall of air-out mouth mask, post sound-absorbing assembly 1 as shown in Figure 1.The sound-absorbing effect of sound-absorbing assembly 1 is directly proportional with its volume, and promptly erection space is big more, and the absorbing sound and lowering noise effect is good more.And therefore the effect that is installed near the sound-absorbing assembly 1 the air inlet can all be equipped with the sound-absorbing assembly at the air inlet place of air-out mouth mask and blower fan than being installed in the effective of sound-absorbing assembly on the air-out mouth mask while, and better effects if like this mutually combines.
Although more than described the preferred embodiments of the present invention in detail, should be expressly understood that for a person skilled in the art, the present invention can have various changes and variation.All any modifications of being done within the spirit and principles in the present invention, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (21)
1. the noise-reduction method of a range hood is included in and is provided with sound-absorbing material in the range hood, it is characterized in that: the outside at described sound-absorbing material (5) coats thin film (6).
2. a noise-reduction method as claimed in claim 1 is characterized in that: described film (6) employing oleophobic plastic.
3. noise-reduction method as claimed in claim 2 is characterized in that: described film (6) adopts fluorinated ethylene propylene copolymer (FEP) or soluble poly tetrafluoroethene (PFA).
4. one kind as claim 2 or 3 described noise-reduction methods, and it is characterized in that: the thickness of described film (6) is 0.01mm-0.1mm.
5. noise-reduction method as claimed in claim 1 is characterized in that: described sound-absorbing material (5) adopts acoustical cotton, foamed plastics, aluminum fiber cotton, single-layer polyester cellucotton, plant cellulose sprayed on material or centrifugally glass-wool.
6. noise-reduction method as claimed in claim 5 is characterized in that: the thickness of described sound-absorbing material (5) is 1cm-5cm.
7. noise-reduction method as claimed in claim 1 is characterized in that: when the blower fan of described range hood was one, described sound-absorbing material (5) and film (6) were 5cm-20cm from the distance of described air inlet.
8. noise-reduction method as claimed in claim 7 is characterized in that: described sound-absorbing material (5) and film (6) are 10cm from the distance of described air inlet.
9. noise-reduction method as claimed in claim 1 is characterized in that: when the blower fan of described range hood was two, described sound-absorbing material (5) and film (6) were 5cm-15cm from the distance of described air inlet.
10. noise-reduction method as claimed in claim 9 is characterized in that: described sound-absorbing material (5) and film (6) are 8cm from the distance of described air inlet.
11. as each described noise-reduction method of claim 1-3,5-10, it is characterized in that: it is that 2cm, unit weight are 100kg/m that described sound-absorbing material (5) adopts thickness
3Centrifugally glass-wool, it is the fluorinated ethylene propylene copolymer (FEP) of 0.03mm that described film (6) adopts thickness.
12. low noise range hood, comprise housing (7,7 '), be installed on blower fan (3,3 ') in the housing (7,7 ') and the air-out mouth mask (2) that is positioned at described housing (7,7 ') top, it is characterized in that: post sound-absorbing assembly (1) in the described housing (7,7 ') on the sidewall of the described blower fan air inlet of (3,3 ') (8,8 ') and/or on the madial wall of described air-out mouth mask (2), described sound-absorbing assembly (1) comprises sound-absorbing material (5) and coats the film (6) of described sound-absorbing material (5).
13. low noise range hood as claimed in claim 12 is characterized in that: described sound-absorbing material (5) adopts acoustical cotton, foamed plastics, aluminum fiber cotton, single-layer polyester cellucotton, plant cellulose sprayed on material or centrifugally glass-wool.
14. low noise range hood as claimed in claim 12 is characterized in that: described film (6) adopts the oleophobic plastic.
15. low noise range hood as claimed in claim 14 is characterized in that: described film (6) is fluorinated ethylene propylene copolymer (FEP) or soluble poly tetrafluoroethene (PFA).
16. low noise range hood as claimed in claim 13 is characterized in that: the thickness of described sound-absorbing material is 1cm-5cm.
17. as claim 14 or 15 described low noise range hoods, it is characterized in that: the thickness of described film is 0.01mm-0.1mm.
18. low noise range hood as claimed in claim 12 is characterized in that: the blower fan of described range hood is one, and described sound-absorbing assembly (1) is 5-20cm from the distance of described air inlet.
19. low noise range hood as claimed in claim 18 is characterized in that: described sound-absorbing assembly (1) is 10cm from the distance of described air inlet.
20. low noise range hood as claimed in claim 12 is characterized in that: the blower fan of described range hood is two, and described sound-absorbing assembly (1) is 5cm-15cm from the distance of described air inlet.
21. low noise range hood as claimed in claim 20 is characterized in that: described sound-absorbing assembly (1) is 8cm from the distance of described air inlet.
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| CN103974154A (en) * | 2014-05-08 | 2014-08-06 | 常州市泛亚汽车饰件有限公司 | Full-frequency noise reduction protecting jacket for automobile loudspeaker |
| CN104913360A (en) * | 2015-07-06 | 2015-09-16 | 苏州斯洛莱自动化设备有限公司 | Range hood with noise reduction mask |
| CN106051872A (en) * | 2016-07-22 | 2016-10-26 | 宁波方太厨具有限公司 | Extractor hood |
| CN106152217A (en) * | 2016-08-19 | 2016-11-23 | 桂林福冈新材料有限公司 | A kind of noise reduction range hood |
| CN106642261A (en) * | 2016-12-29 | 2017-05-10 | 宁波方太厨具有限公司 | Performance adjusting device of range hood and range hood applying performance adjusting device |
| CN107388317A (en) * | 2017-08-23 | 2017-11-24 | 华帝股份有限公司 | A kind of denoising structure of range hood |
| CN107449007A (en) * | 2017-09-15 | 2017-12-08 | 华帝股份有限公司 | A kind of range hood |
| CN109373396A (en) * | 2018-11-27 | 2019-02-22 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise interference device |
| CN113203111A (en) * | 2021-04-29 | 2021-08-03 | 宁波方太厨具有限公司 | Range hood and noise reduction control method thereof |
| CN113294819A (en) * | 2021-05-31 | 2021-08-24 | 华帝股份有限公司 | Fume exhaust fan |
| CN114811682A (en) * | 2022-03-30 | 2022-07-29 | 宁波方太厨具有限公司 | A subassembly and range hood of making an uproar falls for range hood |
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|---|---|---|---|---|
| CN103974154A (en) * | 2014-05-08 | 2014-08-06 | 常州市泛亚汽车饰件有限公司 | Full-frequency noise reduction protecting jacket for automobile loudspeaker |
| CN104913360A (en) * | 2015-07-06 | 2015-09-16 | 苏州斯洛莱自动化设备有限公司 | Range hood with noise reduction mask |
| CN106051872B (en) * | 2016-07-22 | 2018-07-17 | 宁波方太厨具有限公司 | A kind of range hood |
| CN106051872A (en) * | 2016-07-22 | 2016-10-26 | 宁波方太厨具有限公司 | Extractor hood |
| CN106152217A (en) * | 2016-08-19 | 2016-11-23 | 桂林福冈新材料有限公司 | A kind of noise reduction range hood |
| CN106642261A (en) * | 2016-12-29 | 2017-05-10 | 宁波方太厨具有限公司 | Performance adjusting device of range hood and range hood applying performance adjusting device |
| CN107388317A (en) * | 2017-08-23 | 2017-11-24 | 华帝股份有限公司 | A kind of denoising structure of range hood |
| CN107449007A (en) * | 2017-09-15 | 2017-12-08 | 华帝股份有限公司 | A kind of range hood |
| CN109373396A (en) * | 2018-11-27 | 2019-02-22 | 佛山市云米电器科技有限公司 | A kind of kitchen ventilator with noise interference device |
| CN113203111A (en) * | 2021-04-29 | 2021-08-03 | 宁波方太厨具有限公司 | Range hood and noise reduction control method thereof |
| CN113294819A (en) * | 2021-05-31 | 2021-08-24 | 华帝股份有限公司 | Fume exhaust fan |
| CN113294819B (en) * | 2021-05-31 | 2022-12-06 | 华帝股份有限公司 | Fume exhaust fan |
| CN114811682A (en) * | 2022-03-30 | 2022-07-29 | 宁波方太厨具有限公司 | A subassembly and range hood of making an uproar falls for range hood |
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Application publication date: 20110525 |