CN114322036A - Noise reduction method, noise reduction device and range hood thereof - Google Patents
Noise reduction method, noise reduction device and range hood thereof Download PDFInfo
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Abstract
The invention relates to the technical field of kitchen appliances, in particular to a noise reduction method, a noise reduction device and a range hood thereof. The noise reduction method comprises the following steps: firstly, collecting a sample; secondly, judging whether the noise intensity reaches the standard or not, and repeating the first step; thirdly, the noise exceeds the standard, and the vibration of the target equipment is restrained through the piezoelectric effect according to the vibration information detected in the first step, so that the noise intensity is reduced; simultaneously, audio frequency injection is carried out to blend the noise emitted by the target equipment; and fourthly, repeating the first step until the noise reaches the standard. The noise reduction device is based on the noise reduction method. The range hood at least comprises the noise reduction device. The piezoelectric driver is utilized to suppress deformation caused by vibration according to the vibration condition of the noise generation component, noise is reduced from the source sent by the noise, the noise which is not completely eliminated is improved by matching with the adjusting sound, and the hearing experience of a user is greatly improved.
Description
Technical Field
The invention relates to the technical field of kitchen appliances, in particular to a noise reduction method, a noise reduction device and a range hood thereof.
Background
The noise characteristic of the range hood is one of the important marks for measuring the quality of the range hood, and the operation noise of the range hood not only affects the surrounding environment, but also greatly affects the physical and mental health and the work of people. On one hand, common sound insulation and vibration isolation technologies are applied more, but noise still cannot be effectively controlled, and meanwhile, as the structure is gradually improved towards light weight in the future, the traditional materials have greater limitations. With the emergence of novel intelligent materials, the unique performance of the novel intelligent materials can be widely applied to the vibration and noise reduction technology. On the other hand, people are pursuing humanized functions of the range hood more and more, and enjoy high quality of sound, and few range hood products with audio injection are on the market, which provides a wide development space for the development of the audio injection technology.
The inventor finds that the noise pollution of the existing range hood is serious, the use experience of a client is seriously influenced, and the noise generated in the operation work of the range hood mainly comes from two aspects: aerodynamic noise and structural vibration noise. The air flow noise is due to the design of the flow field, while the structural vibration noise is due to the structural properties of the material itself. Most of the traditional noise control methods adopt materials with high damping ratio or adopt sound insulation and vibration isolation technologies to design and control noise, however, vibration and noise of some structures cannot be effectively controlled, and the traditional noise control methods are contrary to the development direction of future structural lightweight; meanwhile, the requirements of human beings on the cooking environment of the kitchen are continuously improved, higher requirements are provided for the noise of the kitchen range hood, and the running sound quality of the range hood is more and more concerned by people.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the noise treatment effect of the existing range hood is poor.
(II) technical scheme
In order to solve the above technical problem, an embodiment of an aspect of the present invention provides a noise reduction method, including the following steps:
firstly, collecting a noise sample sent by target equipment;
secondly, comparing the collected noise intensity with a set noise standard value, judging whether the noise intensity reaches the standard or not, and repeating the first step;
thirdly, the noise exceeds the standard, and the vibration of the target equipment is restrained through the piezoelectric effect according to the vibration information detected in the first step, so that the noise intensity is reduced; simultaneously, audio frequency injection is carried out to blend the noise emitted by the target equipment;
and fourthly, repeating the first step until the noise reaches the standard.
As an optional implementation manner of the present invention, in the first step, before the noise sample is collected, a modal test and/or a modal simulation technique is used for performing a judgment, a structural vibration weak point of the target device is determined, and the noise sample collection is performed with respect to the structural vibration weak point.
As an alternative embodiment of the invention, in the third step, the piezoelectric effect is implemented at a structural vibration weak point of the target device.
As an alternative embodiment of the present invention, in the first step, the magnitude of the displacement of the vibration of the target device is used as a criterion for determining whether the noise intensity meets the standard.
A noise reduction device based on any one of the above noise reduction methods comprises: the piezoelectric transducer, the controller, the piezoelectric driver and the audio injection modulator;
the piezoelectric sensor is electrically connected with the controller, is arranged on target equipment and converts vibration information of the target equipment into an electric signal to be transmitted to the controller;
the controller is electrically connected with the piezoelectric driver, the piezoelectric driver is arranged on the target equipment, and the piezoelectric driver generates stress for inhibiting the deformation of the target equipment after receiving the instruction of the controller;
the audio injection regulator is electrically connected with the controller, and the controller controls the audio injection regulator to add harmonic sound into noise, so that the auditory sensation of a user is improved.
As an optional implementation manner of the present invention, an a/D converter is further disposed between the piezoelectric sensor and the controller, and the a/D converter converts an electrical signal sent by the piezoelectric sensor into a digital signal and transmits the digital signal to the controller; and/or the presence of a gas in the gas,
and a D/A converter is also arranged between the controller and the piezoelectric driver and converts a digital signal sent by the controller into an electric signal to be transmitted to the piezoelectric driver.
In an alternative embodiment of the present invention, the piezoelectric sensor and the piezoelectric driver are arranged in pairs, and both are arranged in pairs in the same vibration region of the noise reduction device.
As an alternative embodiment of the present invention, the number of the piezoelectric sensors and the piezoelectric drivers is one or more groups, and each of the piezoelectric sensors and the piezoelectric drivers is disposed at a structural vibration weak point of the noise reduction device.
As an optional implementation manner of the present invention, the audio injection controller further includes a memory and a timer, the memory stores a plurality of music, and the timer controls a plurality of groups of music in the memory to play periodically at regular time.
As an optional implementation manner of the present invention, the audio injection controller further includes a control panel, and a user selects and sets music to be played through the control panel.
As an optional implementation manner of the present invention, the controller further includes a noise intensity determining component, the noise intensity determining component monitors the noise intensity according to the a/D converter import information, a value of L0 is provided in the noise intensity determining component, when the external noise intensity is greater than a value of L0, the controller controls the audio injection regulator to be turned on, and when the external noise intensity is less than a value of L0, the controller controls the audio injection regulator to be turned off.
As an alternative embodiment of the present invention, the controller controls the level of the harmonic volume played by the audio injection regulator according to the noise intensity.
As an alternative embodiment of the present invention, the controller further comprises an adjustment component, and the adjustment component regulates the size of the L0 value to meet the different requirements of different users.
A range hood at least comprises the noise reduction device.
The invention has the beneficial effects that:
the noise reduction method provided by the invention comprises the following steps: firstly, collecting a noise sample sent by target equipment; secondly, comparing the collected noise intensity with a set noise standard value, judging whether the noise intensity reaches the standard or not, and repeating the first step; thirdly, the noise exceeds the standard, and the vibration of the target equipment is restrained through the piezoelectric effect according to the vibration information detected in the first step, so that the noise intensity is reduced; simultaneously, audio frequency injection is carried out to blend the noise emitted by the target equipment; and fourthly, repeating the first step until the noise reaches the standard.
The noise reduction method provided by the invention carries out noise reduction treatment from another aspect, on one hand, the piezoelectric effect is adopted, the vibration condition of the target equipment is matched when the noise is generated, the suppression force is applied to the vibration area, and the generation of the noise is cut off from the source; on the other hand, in consideration of the difficulty in completely eliminating noise, audio injection is performed in addition to noise elimination by the piezoelectric effect, and the noise is blended into superimposed sound that is easily accepted by the user, thereby further improving the user's hearing.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of an embodiment of a noise reduction method according to the present invention;
fig. 2 is a flow chart of a structure of a noise reduction apparatus according to an embodiment of the present invention;
FIG. 3 is a schematic perspective view of a volute according to an embodiment of the present invention;
FIG. 4 is a front view of a volute provided by one embodiment of the present invention;
fig. 5 is a schematic structural diagram of a range hood according to an embodiment of the present invention.
Icon: 1-a piezoelectric sensor; 2-a controller; 3-a piezoelectric actuator; 4-audio injection regulator; 5-a volute; 6-loudspeaker.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and detailed description, and the embodiments and features of the embodiments of the present application may be combined with each other without conflict. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, the noise reduction method of the present invention includes the following steps: firstly, collecting a noise sample sent by target equipment; secondly, comparing the collected noise intensity with a set noise standard value, judging whether the noise intensity reaches the standard or not, and repeating the first step; thirdly, the noise exceeds the standard, and the vibration of the target equipment is restrained through the piezoelectric effect according to the vibration information detected in the first step, so that the noise intensity is reduced; simultaneously, audio frequency injection is carried out to blend the noise emitted by the target equipment; and fourthly, repeating the first step until the noise reaches the standard.
The noise reduction method provided by the invention carries out noise reduction treatment from another aspect, on one hand, the piezoelectric effect is adopted, the vibration condition of the target equipment is matched when the noise is generated, the suppression force is applied to the vibration area, and the generation of the noise is cut off from the source; on the other hand, in consideration of the difficulty in completely eliminating noise, audio injection is performed in addition to noise elimination by the piezoelectric effect, and the noise is blended into superimposed sound that is easily accepted by the user, thereby further improving the user's hearing.
According to an embodiment of the present invention, in the first step, before the noise sample is collected, a modal test and/or a modal simulation technique is used for performing a judgment, a structural vibration weak point of the target device is determined, and the noise sample collection is performed for the structural vibration weak point.
According to an embodiment of the invention, in said third step, the piezoelectric effect is implemented at a structural vibration weak point of the target device. Through dual application of modal simulation hormone and testing, the maximum point of structural vibration displacement is accurately positioned, blank errors are filled, data signals acquired by the piezoelectric sensor 1 are more accurate and effective, and meanwhile, the driver can accurately position and control the structural maximum displacement deformation area, so that structural vibration is more effectively inhibited.
According to an embodiment of the present invention, in the first step, the magnitude of the displacement amount of the vibration of the target device is used as a criterion for determining whether the noise intensity meets the standard. Through increasing the displacement in controller 2 and judging preset condition, gather vibration displacement ratio size and carry out logic control, can strengthen the leakproofness of logic on the one hand, on the other hand displacement signal will be more convincing than the vibration acceleration signal, more be close to actual characteristics, improved the feasibility of data, reduce the judgement error.
A noise reduction device based on any one of the above noise reduction methods comprises: the piezoelectric transducer 1, the controller 2, the piezoelectric driver 3 and the audio injection modulator 4;
the piezoelectric sensor 1 is electrically connected with the controller 2, the piezoelectric sensor 1 is arranged on target equipment, and converts vibration information of the target equipment into an electric signal to be transmitted to the controller 2;
the controller 2 is electrically connected with the piezoelectric driver 3, the piezoelectric driver 3 is arranged on target equipment, and stress for inhibiting deformation of the target equipment is generated after receiving an instruction of the controller 2;
the audio injection regulator 4 is electrically connected with the controller 2, and the controller 2 controls the audio injection regulator 4 to add harmonic sound into noise, so that the auditory sensation of a user is improved.
The piezoelectric driver 3 directly acts on the noise generation part, the piezoelectric driver 3 generates deformation for inhibiting noise vibration, noise is eliminated from the source, and the noise reduction effect is obvious. In addition, aiming at the phenomenon that the noise is not completely eliminated, the audio injection regulator 4 is utilized to add the regulating sound into the noise piece, and the auditory effect of the noise is improved. In conclusion, the noise reduction device is used for a loud noise device which needs to be operated by a user at a close distance, and can greatly improve the hearing experience.
According to an embodiment of the present invention, an a/D converter is further disposed between the piezoelectric sensor 1 and the controller 2, and the a/D converter converts an electrical signal emitted by the piezoelectric sensor 1 into a digital signal and transmits the digital signal to the controller 2; and/or the presence of a gas in the gas,
a D/A converter is further arranged between the controller 2 and the piezoelectric driver 3, and the D/A converter converts digital signals sent by the controller 2 into electric signals and transmits the electric signals to the piezoelectric driver 3.
Specifically, the noise reduction device includes: a controller 2 (which collects mainly analog signals and digital signals and transmits the signals, etc.), a piezoelectric sensor 1, a piezoelectric driver 3, an a/D converter, a D/a converter, and an audio injection regulator 4.
The controller 2 is directly connected with the A/D converter and the D/A converter respectively, and the A/D converter, the D/A converter and the D/A converter are integrated on a control panel;
the controller 2 is also connected with the audio injection regulator 4, and the controller 2 sends a corresponding instruction to the audio injection regulator 4 after processing the collected signals;
the piezoelectric sensor 1 is mainly connected with an A/D converter, the piezoelectric sensor 1 transmits collected signal characteristics to the A/D converter to convert signals to the controller 2, and the specific installation positions of the piezoelectric sensor 1 and the piezoelectric driver 3 need to adopt a mode test or a mode simulation technology to judge and determine the weak point of structural vibration.
The piezoelectric driver 3 is mainly connected with the D/A converter, the controller 2 processes the collected signals and sends instructions to the D/A converter, the D/A converter converts the signals and then transmits the signals to the piezoelectric driver 3, and the piezoelectric driver 3 enables the structure of the noise generation device to be strained so as to change the dynamic damping of the noise generation device, inhibit the vibration of the structure and attenuate the radiation noise. The piezoelectric drivers 3 are mainly installed at the same side position of the piezoelectric sensor 1, and the number of the piezoelectric drivers is the same;
the audio injection regulator 4 may be integrated into the control panel of the device to be installed, or may be provided at another suitable location. The audio injection regulator 4 receives the instruction sent by the controller 2 and then plays the built-in audio through a loudspeaker 6; the built-in regulation sound mainly comprises ten sounds (three types of musical instrument sound, natural sound and artificial synthetic sound), the playing time of each sound is three minutes, and the sounds are played circularly until the range hood stops working; in addition, the audio injection controller 4 can be manually pressed to be turned on, when the structural vibration is not obvious enough, the piezoelectric sensor 1 cannot be subjected to displacement change, and an operator can manually operate the audio injection controller 4 through the button on the control panel. The plurality of speakers 6 connected to the audio injection regulator 4 may be provided at a position where the edge of the device to be mounted is as high as the position of the human ear, or the plurality of speakers 6 may be provided at the top corners of the periphery of the device.
According to one embodiment of the present invention, the piezoelectric sensor 1 and the piezoelectric driver 3 are arranged in pairs, and both are arranged in pairs in the same vibration region of the noise reduction device; the piezoelectric actuator 3 accurately responds to the vibration information fed back from the piezoelectric sensor 1, and accurately suppresses or reduces the vibration in the operation section.
According to one embodiment of the present invention, the number of the piezoelectric sensors 1 and the piezoelectric drivers 3 is one or more groups, and each of the piezoelectric sensors 1 and the piezoelectric drivers 3 is arranged at a structural vibration weak point of the noise reduction device.
The construction device provided by the invention detects the vibration weak points of the structures respectively, inhibits the vibration weak points from being detected and improves the noise reduction performance of the equipment to be installed in an all-round manner.
According to an embodiment of the present invention, the audio injection controller 4 further comprises a memory for storing a plurality of music and a timer for controlling the timed and cyclic playing of a plurality of groups of music in the memory. On one hand, the music is easy to form aesthetic fatigue after long-time appreciation, the various control sounds are automatically and circularly played under the control of the timer, and the content is rich, so that the use comfort level of a user is improved; on the other hand, the user can select the favorite music from the respective regulation sounds to regulate and control the noise, and the use experience is better.
According to an embodiment of the present invention, the audio injection controller 4 further comprises a control panel, and the user selects and sets the music to be played through the control panel.
According to an embodiment of the present invention, the controller 2 further includes a noise intensity determination component, the noise intensity determination component monitors the noise intensity according to the a/D converter import information, the noise intensity determination component is provided with a value of L0, when the external noise intensity is greater than a value of L0, the controller 2 controls the audio injection regulator 4 to be turned on, and when the external noise intensity is less than a value of L0, the controller 2 controls the audio injection regulator 4 to be turned off, wherein the value of L0 is the magnitude of the vibration amplitude (deformation displacement) in the detection area of the piezoelectric sensor 1 in the device to be installed.
According to an embodiment of the present invention, the controller 2 controls the level of the harmonic volume played by the audio injection regulator 4 according to the noise intensity.
According to an embodiment of the present invention, the controller 2 further comprises a regulating member which regulates the magnitude of the L0 value to meet the differential needs of different users.
A range hood at least comprises the noise reduction device.
Specifically, a range hood of any model is selected, vibration weak points of the volute 5 structure are analyzed through modal testing equipment or modal simulation software, the structural weak points mainly include the positions of the back of the volute tongue and the lower ends of the two sides of the volute 5, the well positions are determined and marked, corresponding modal characteristic values and corresponding vibration displacement values are recorded, the vibration characteristics of the structure mainly depend on first-order modal values, and first-order vibration modes and displacement data values L1 are selected in a central mode.
The piezoelectric sensor 1 and the piezoelectric driver 3 made of piezoelectric composite materials are selected and installed at a plurality of vibration weak positions of the mark obtained from the previous testing and simulation result, the piezoelectric sensor 1 and the piezoelectric driver 3 can be pasted or embedded into a volute 5 structure, and the piezoelectric sensor 1 and the piezoelectric driver are installed at the same side position of the volute 5.
The controller 2, the A/D converter and the D/A converter are directly connected and integrated on a control panel of the range hood, wherein the piezoelectric sensor 1 is connected with the A/D converter, and the piezoelectric driver 3 is connected with the D/A converter.
The audio injection controller 4 is also integrated on the panel of the range hood and connected with the controller 2, and the speakers 6 are installed at four top corners of the smoke hood and are generally fixed by bolts.
When the range hood works, the piezoelectric sensor 1 can acquire pressure change generated by vibration of the volute 5 in real time, the piezoelectric sensor 1 can generate a piezoelectric effect when being squeezed, unequal charges are generated, the piezoelectric sensor 1 transmits generated electric signals to the A/D converter, the A/D converter can convert corresponding electric signals into corresponding displacement digital signals and transmit the displacement digital signals to the controller 2, the controller 2 compares the L1 with the built-in L0, if the ratio of L1/L0 is larger than a preset condition value, the controller 2 can transmit signal instructions to the D/A converter, the D/A converter converts the signals and then transmits the signals to the piezoelectric driver 3, and the piezoelectric driver 3 can generate corresponding stress to inhibit deformation of a structure and weaken vibration of the structure;
meanwhile, after the controller 2 receives the signals and judges the signals through a control algorithm, the signals are transmitted to the audio injection regulator 4 according with the conditions, the audio injection regulator 4 receives the signals and can automatically play built-in regulation and control sounds, the regulation and control sounds are played through the loudspeaker 6, the audio injection regulator 4 is internally provided with various regulation and control sounds, the next regulation and control sound can be automatically switched every minute, the running noise of the cigarette machine is masked, and the perception vexation degree of a user is reduced. In addition, the loudspeakers 6 are fixed at the four top corners of the smoke hood by screws, and the heights of the loudspeakers 6 are equal to the heights of human ears during normal installation;
when the preset condition in the controller 2 is not met, the controller 2 does not send an instruction, which indicates that the vibration of the volute 5 is not obvious at the moment, and further, a user can manually control the audio on the panel of the cigarette machine to inject the audio into the button of the regulator 4, so as to play the regulation sound, so that the quality of the running noise of the cigarette machine is changed, and the user perception annoyance is reduced.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the communication may be direct, indirect via an intermediate medium, or internal to both elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (14)
1. A method of noise reduction, comprising the steps of:
firstly, collecting a noise sample sent by target equipment;
secondly, comparing the collected noise intensity with a set noise standard value, judging whether the noise intensity reaches the standard or not, and repeating the first step;
thirdly, the noise exceeds the standard, and the vibration of the target equipment is restrained through the piezoelectric effect according to the vibration information detected in the first step, so that the noise intensity is reduced; simultaneously, audio frequency injection is carried out to blend the noise emitted by the target equipment;
and fourthly, repeating the first step until the noise reaches the standard.
2. The noise reduction method according to claim 1, wherein in the first step, before the noise sample is collected, a modal test and/or a modal simulation technique is used for judging, a structural vibration weak point of the target device is determined, and the noise sample collection is performed for the structural vibration weak point.
3. The noise reduction method according to claim 2, characterized in that in the third step, a piezoelectric effect is implemented at a structural vibration weak point of the target device.
4. The noise reduction method according to claim 1, wherein in the first step, a magnitude of a displacement amount of vibration of the target device is used as a criterion for determining whether the noise intensity is satisfied.
5. A noise reduction apparatus based on the noise reduction method according to any one of claims 1 to 4, comprising: the piezoelectric sensor (1), the controller (2), the piezoelectric driver (3) and the audio injection modulator (4);
the piezoelectric sensor (1) is electrically connected with the controller (2), the piezoelectric sensor (1) is arranged on target equipment, and converts vibration information of the target equipment into an electric signal to be transmitted to the controller (2);
the controller (2) is electrically connected with the piezoelectric driver (3), the piezoelectric driver (3) is arranged on target equipment, and stress for inhibiting deformation of the target equipment is generated after receiving an instruction of the controller (2);
the audio injection regulator (4) is electrically connected with the controller (2), and the controller (2) controls the audio injection regulator (4) to add harmonic sound into noise, so that the auditory sensation of a user is improved.
6. The noise reduction device according to claim 5, wherein an A/D converter is further arranged between the piezoelectric sensor (1) and the controller (2), and the A/D converter converts the electric signal sent by the piezoelectric sensor (1) into a digital signal and transmits the digital signal to the controller (2); and/or the presence of a gas in the gas,
and a D/A converter is also arranged between the controller (2) and the piezoelectric driver (3), and converts a digital signal sent by the controller (2) into an electric signal and transmits the electric signal to the piezoelectric driver (3).
7. The noise reduction device according to claim 5, characterized in that the piezoelectric sensor (1) and the piezoelectric driver (3) are arranged in pairs, both pairs being arranged in the same vibration area of the noise reduction device.
8. The noise reducer according to claim 7, wherein the number of the piezoelectric sensors (1) and the piezoelectric drivers (3) is one or more, and each of the piezoelectric sensors (1) and the piezoelectric drivers (3) is arranged at a structural vibration weak point of the noise reducer.
9. The noise reduction device according to claim 5, wherein the audio injection regulator (4) further comprises a memory storing a plurality of music and a timer controlling the timed playing of a plurality of groups of music in the memory.
10. The noise reduction device according to claim 9, wherein the audio injection regulator (4) further comprises a control panel through which a user selects and sets music to be played.
11. The noise reduction apparatus according to claim 6, further comprising a noise intensity determination means in the controller (2), wherein the noise intensity determination means monitors the noise intensity according to the a/D converter introduction information, the noise intensity determination means has a value of L0 provided therein, the controller (2) controls the audio injection regulator (4) to be turned on when the external noise intensity is greater than the value of L0, and the controller (2) controls the audio injection regulator (4) to be turned off when the external noise intensity is less than the value of L0.
12. The noise reduction apparatus according to claim 11, wherein the controller (2) controls the level of the harmonic volume played by the audio injection regulator (4) according to the noise intensity.
13. The noise reduction device according to claim 11, characterized in that the controller (2) further comprises an adjustment member that regulates the magnitude of the L0 value to meet the different needs of different users.
14. A range hood comprising at least the noise reducing device of any of claims 5 to 13.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710583A (en) * | 2016-12-27 | 2017-05-24 | 杭州老板电器股份有限公司 | Active-vibration control method for controlling noise of range hood |
| CN107729677A (en) * | 2017-11-01 | 2018-02-23 | 国网湖南省电力公司 | A kind of vibration of high current enclosed busbar bridge and noise suppressing method |
| CN108734933A (en) * | 2017-04-13 | 2018-11-02 | 广东美的智美科技有限公司 | Range hood and control method |
| CN108731045A (en) * | 2017-04-13 | 2018-11-02 | 广东美的智美科技有限公司 | Range hood and noise-reduction method |
| CN112361404A (en) * | 2020-10-27 | 2021-02-12 | 宁波方太厨具有限公司 | Noise reduction method and system for range hood and range hood with noise reduction system |
| CN113393855A (en) * | 2021-06-16 | 2021-09-14 | 珠海格力电器股份有限公司 | Active noise reduction method and device, computer readable storage medium and processor |
| CN216868593U (en) * | 2022-01-28 | 2022-07-01 | 杭州老板电器股份有限公司 | Noise reduction device and smoke exhaust ventilator thereof |
-
2022
- 2022-01-28 CN CN202210104974.9A patent/CN114322036A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106710583A (en) * | 2016-12-27 | 2017-05-24 | 杭州老板电器股份有限公司 | Active-vibration control method for controlling noise of range hood |
| CN108734933A (en) * | 2017-04-13 | 2018-11-02 | 广东美的智美科技有限公司 | Range hood and control method |
| CN108731045A (en) * | 2017-04-13 | 2018-11-02 | 广东美的智美科技有限公司 | Range hood and noise-reduction method |
| CN107729677A (en) * | 2017-11-01 | 2018-02-23 | 国网湖南省电力公司 | A kind of vibration of high current enclosed busbar bridge and noise suppressing method |
| CN112361404A (en) * | 2020-10-27 | 2021-02-12 | 宁波方太厨具有限公司 | Noise reduction method and system for range hood and range hood with noise reduction system |
| CN113393855A (en) * | 2021-06-16 | 2021-09-14 | 珠海格力电器股份有限公司 | Active noise reduction method and device, computer readable storage medium and processor |
| CN216868593U (en) * | 2022-01-28 | 2022-07-01 | 杭州老板电器股份有限公司 | Noise reduction device and smoke exhaust ventilator thereof |
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