CN214788236U - Noise reduction device for range hood and range hood with noise reduction device - Google Patents
Noise reduction device for range hood and range hood with noise reduction device Download PDFInfo
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- CN214788236U CN214788236U CN202022430338.4U CN202022430338U CN214788236U CN 214788236 U CN214788236 U CN 214788236U CN 202022430338 U CN202022430338 U CN 202022430338U CN 214788236 U CN214788236 U CN 214788236U
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Abstract
The utility model relates to a range hood that device of making an uproar and applied to have this device of making an uproar falls that range hood used falls, the device of making an uproar falls that range hood used includes at least one noise collector, controller and speaker, noise collector and speaker are connected respectively to the controller, noise collector gathers noise signal, the sound wave signal of this noise signal is offset according to the noise signal generation that noise collector gathered to the controller, the sound wave signal that speaker broadcast controller generated, a serial communication port, noise collector and speaker all set up in fan system department. The noise collector collects a noise signal of a main noise source of the range hood, namely a fan system, the controller generates a sound wave signal for offsetting the collected noise signal, and the loudspeaker directly plays the sound wave signal at the position of the sound wave signal, so that the loss of the sound wave signal in the transmission process can be avoided, and the noise reduction effect of the fan system is improved.
Description
Technical Field
The utility model relates to a range hood field especially relates to a range hood that falls device of making an uproar and applied the range hood that has this device of making an uproar that falls that range hood used.
Background
The range hood has become the essential equipment of most family kitchens, and through the work of range hood, the oil smoke in the kitchen environment can be discharged in time, keeps the kitchen environment, even the air of whole indoor environment clean.
The range hood can produce the noise usually at the during operation, influences user's use experience effect. In order to reduce the adverse effect of noise generated during the operation of the range hood on users, an active noise reduction method (or called an active noise reduction method) is mainly adopted for noise reduction treatment at present.
The existing active noise reduction method is mainly characterized in that a noise collector for collecting the whole noise of the range hood, a sound signal generator and a loudspeaker device are additionally arranged on the basis of the structure of the existing range hood, the sound signal generator generates sound wave signals which have the same amplitude and opposite phases with the whole noise of the range hood according to the whole noise of the range hood collected by the noise collector, and the sound wave signals are broadcasted by the loudspeaker device, so that the sound wave signals offset the whole noise of the range hood, and the noise reduction effect is achieved.
However, the existing active noise reduction scheme of the range hood mainly reduces noise by using the sound pressure level of the whole noise of the range hood as a target, that is, the sound wave signal generated in the active noise reduction process to offset the noise signal mainly aims at the whole noise of the range hood, but does not specifically reduce noise in a targeted manner aiming at a fan system, which is a main source of the noise of the range hood, so that even if the active noise reduction process is executed, the main noise (i.e., the noise at the fan system) generated in the operation process of the range hood is not reduced, and the effect of effectively reducing noise of the range hood is still difficult to achieve.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the first technical problem that a noise reduction device for range hood is provided to above-mentioned prior art. The noise reduction device for the range hood collects noise signals at a main noise source of the range hood, namely a fan system, and generates sound wave signals for offsetting the noise signals at the collected fan system, so that noise reduction processing of the main noise source of the range hood is realized, and an effective noise reduction effect for the range hood is achieved.
The utility model aims to solve the second technical problem that a range hood that has above-mentioned device of making an uproar falls in application is provided.
The utility model provides a technical scheme that first technical problem adopted does: noise reduction device that range hood was used includes:
at least one noise collector for collecting noise signals;
the controller is connected with the noise collector and generates a sound wave signal for offsetting the noise signal according to the noise signal collected by the noise collector;
the loudspeaker is connected with the controller and plays the sound wave signal generated by the controller;
the noise collector and the loudspeaker are both arranged at the fan system.
The utility model discloses an in, gather the noise signal of the main noise source of range hood-fan system department through noise collector, and produce by the controller and offset the sound wave signal of the fan system department noise of gathering, this sound wave signal is broadcast at its position of locating directly to the speaker, avoids the loss of this sound wave signal in the propagation like this, realizes making an uproar falling of fan system department noise, and then reaches the noise reduction effect to the range hood noise.
In the utility model discloses an among the device of making an uproar falls, specifically, fan system is including spiral case and impeller, and at least one noise collector sets up in the intermediate space that spiral case and impeller formed.
Specifically, the noise collector located in the intermediate space may be located above the volute, as required.
At least one noise collector can also be positioned in the interlayer of the volute, as desired. Of course, the noise collectors can also be arranged above the interlayer of the volute and the volute respectively and simultaneously.
In order to absorb high-frequency noise in the volute interlayer and ensure that a noise collector in the volute interlayer collects medium-low frequency noise, as an improvement, first sound absorption cotton wrapping the noise collector is arranged in the volute interlayer.
In order to avoid the adverse effect of noise on the sound wave signal played by the loudspeaker and then enhance the cancellation effect of the sound wave signal on the noise signal of the main noise source of the range hood, the noise reduction device for the range hood further comprises a second sound absorption cotton arranged in at least one direction around the loudspeaker.
Of course, the noise reduction device for the range hood can also comprise a loudspeaker box body according to actual needs, the loudspeaker is arranged on the inner side of the loudspeaker box body, and the second sound absorption cotton is arranged on the periphery of the loudspeaker box body.
The utility model provides a technical scheme that second technical problem adopted does: the range hood with the noise reduction device comprises a fan system and is characterized in that the noise collector and the loudspeaker are both arranged at the fan system.
Compared with the prior art, the utility model has the advantages of:
firstly, in this utility model's noise reduction device, gather the noise signal of the main noise source of range hood-fan system department through noise collector, and produce the sound wave signal who offsets the noise signal of gathering fan system department by the controller, play this sound wave signal at its position (fan system department promptly) directly by the speaker, can avoid the loss of this sound wave signal in the propagation like this, realized noise reduction device and fallen to making an uproar of the main noise source of range hood, reached the effective noise reduction effect for range hood.
Secondly, the first silencing cotton is wrapped on the outer side of the noise collector, and high-frequency noise entering an interlayer of the volute is absorbed by the aid of the first silencing cotton, so that the noise collector in the interlayer of the volute mainly collects medium and low frequency noise, accuracy of a sound wave signal generated by the controller and having a noise cancellation effect is improved, and the noise signal at the fan system is effectively cancelled by the sound wave signal.
Finally, through set up the second in the periphery of speaker and inhale the sound cotton, inhale the sound cotton through the second and eliminate the adverse effect that the range hood noise played the sound wave signal to the speaker, strengthen this sound wave signal then to the offset effect of fan system department noise signal.
Drawings
Fig. 1 is a schematic connection diagram of main components of a noise reduction device for a range hood in the embodiment;
FIG. 2 is a schematic view of the noise reducer shown in FIG. 1 mounted on a range hood;
fig. 3 is a sectional view of the whole structure shown in fig. 2.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1, the embodiment provides a noise reduction device for a range hood, which is used for reducing noise generated by a fan system of the range hood, wherein the fan system comprises a volute 21 and an impeller 22, and the volute 21 has an interlayer 210. The noise reduction device of the embodiment includes a plurality of noise collectors 11, a controller 12 and a speaker 13, where the noise collectors 11 are disposed in plural, one of the noise collectors 11 is disposed on a base 111, the base 111 is disposed in an intermediate space 23 formed by a volute 21 and an impeller 22 through a bracket 112, the controller 12 may be independently disposed or disposed on a housing of the range hood as required, for example, integrated with a control board of the range hood, and the speaker 13 is disposed at a fan system. Wherein, the noise collectors 11 are disposed in the middle space 23 and above the scroll casing 21 and in the interlayer 210 of the scroll casing 21, and the interlayer 210 of the scroll casing 21 is disposed with the first sound absorbing cotton 14 covering the corresponding noise collector 11. Meanwhile, a second sound-absorbing cotton 15 is arranged in at least one direction around the speaker 13, and the speaker 13 is arranged inside a speaker box body 16, the second sound-absorbing cotton 15 is arranged around the speaker box body 16, and the second sound-absorbing cotton 15 is positioned inside the sound-absorbing box 150. Specifically, referring to fig. 3, second sound absorption cotton 15 is disposed on two side walls of a fan frame 24 of the range hood, below the speaker box 16, and above the speaker 13. Here, the second sound-absorbing cotton 15 eliminates the adverse effect of noise on the sound wave signal played by the loudspeaker, and then enhances the cancellation effect of the sound wave signal on the noise signal generated by the fan system.
Referring to fig. 2 and 3, after the noise reduction device of this embodiment is installed on the range hood 3, the noise reduction device collects noise signals at a fan system, which is a main noise source of the range hood, through the noise collector 11, the controller 12 generates sound wave signals for canceling the collected noise signals, and the speaker 13 directly plays the sound wave signals at the position where the sound wave signals are located, so that loss of the sound wave signals in the transmission process can be avoided, noise reduction of the noise at the fan system is realized, and further, a noise reduction effect for the noise of the range hood is achieved. Because the noise collector 11 in the interlayer 210 of the volute 21 is coated by the first sound-absorbing cotton 14, the first sound-absorbing cotton 14 can be used for absorbing high-frequency noise in the interlayer 210 of the volute 21, so that the noise collector in the volute interlayer 210 mainly collects medium and low frequency noise, the accuracy of the sound wave signal generated by the controller 12 and having the noise cancellation effect is improved, and the noise reduction effect of the sound wave signal played by the loudspeaker 13 on the noise signal at the fan system is further enhanced.
In addition, the embodiment also provides a range hood with the noise reduction device. The range hood comprises the fan system, and the noise collector 11 and the loudspeaker 12 of the noise reduction device are both arranged at the fan system.
Claims (6)
1. Noise reduction device that range hood was used includes:
at least one noise collector (11) for collecting noise signals;
the controller (12) is connected with the noise collector (11) and generates a sound wave signal for offsetting the noise signal according to the noise signal collected by the noise collector (11);
a speaker (13) connected to the controller (12) for playing the sound wave signal generated by the controller (12);
the noise collector is characterized in that the noise collector (11) and the loudspeaker (13) are both arranged at the fan system; the fan system comprises a volute (21) and an impeller (22), at least one noise collector (11) is arranged in an intermediate space (23) formed by the volute (21) and the impeller (22), and the noise collector (11) located in the intermediate space (23) is located above the volute (21).
2. The noise reduction device for a range hood according to claim 1, characterized in that at least one noise collector (11) is located in the sandwich (210) of the volute (21).
3. The noise reduction device for a range hood according to claim 2, wherein the sandwich layer (210) of the volute (21) is provided with a first sound-absorbing cotton (14) covering the noise collector (11).
4. The noise reduction device for a range hood according to claim 3, further comprising a second sound-absorbing cotton (15) provided in at least one direction around the speaker (13).
5. The noise reduction device for the range hood according to claim 4, further comprising a speaker box (16), wherein the speaker (13) is disposed inside the speaker box (16), and a second sound-absorbing cotton (15) is disposed on the periphery of the speaker box (16).
6. A range hood applying the noise reduction device for the range hood according to any one of claims 1 to 5, comprising a fan system, wherein the noise collector (11) and the speaker (13) are both arranged at the fan system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022430338.4U CN214788236U (en) | 2020-10-28 | 2020-10-28 | Noise reduction device for range hood and range hood with noise reduction device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022430338.4U CN214788236U (en) | 2020-10-28 | 2020-10-28 | Noise reduction device for range hood and range hood with noise reduction device |
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| CN214788236U true CN214788236U (en) | 2021-11-19 |
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| CN202022430338.4U Active CN214788236U (en) | 2020-10-28 | 2020-10-28 | Noise reduction device for range hood and range hood with noise reduction device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114648973A (en) * | 2022-02-28 | 2022-06-21 | 宁波方太厨具有限公司 | Active noise reduction device, range hood and active noise reduction method |
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- 2020-10-28 CN CN202022430338.4U patent/CN214788236U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114648973A (en) * | 2022-02-28 | 2022-06-21 | 宁波方太厨具有限公司 | Active noise reduction device, range hood and active noise reduction method |
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