CN110701649A - Control method and range hood - Google Patents
Control method and range hood Download PDFInfo
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- CN110701649A CN110701649A CN201810753195.5A CN201810753195A CN110701649A CN 110701649 A CN110701649 A CN 110701649A CN 201810753195 A CN201810753195 A CN 201810753195A CN 110701649 A CN110701649 A CN 110701649A
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- sound wave
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
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Abstract
The invention discloses a control method. The control method is used for controlling the range hood, the range hood comprises a noise reduction part, and the noise reduction part comprises a cylinder and a noise reduction module. The cylinder is formed with a flow passage. The amortization module includes a plurality of audio generator, and a plurality of audio generator set up the inner wall at the barrel along the circumference interval of barrel. The control method comprises the following steps: acquiring a first sound wave conducted in a flow channel; and controlling the at least one audio generator to generate a second sound wave, wherein the phase of the second sound wave is opposite to the phase of the first sound wave, and the amplitude of the second sound wave is the same as the amplitude of the first sound wave. The control method of the embodiment of the invention weakens the noise by controlling the audio generator to generate the sound wave, can simply and conveniently realize noise reduction, has good noise reduction effect and is beneficial to improving the user experience. The invention also discloses a range hood.
Description
Technical Field
The invention relates to the technical field of noise reduction, in particular to a control method and a range hood.
Background
With the rise of health consciousness of people, the range hood becomes a necessary household appliance in a household kitchen. The smoke exhaust ventilator can absorb gas such as oil smoke generated during cooking so as to prevent the gas such as the oil smoke from diffusing to harm the health of users. However, the range hood generates a large amount of noise when operating, which affects the user experience.
Disclosure of Invention
The invention provides a control method and a range hood.
The control method provided by the invention is used for controlling the range hood. The smoke ventilator comprises a noise reduction component, and the noise reduction component comprises a cylinder and a noise reduction module. The cylinder is formed with a flow passage. The amortization module includes a plurality of audio generator, a plurality of audio generator follow the circumference interval of barrel sets up the inner wall of barrel. The control method comprises the following steps:
acquiring a first sound wave conducted in the flow channel; and
controlling at least one of the audio generators to generate a second sound wave, wherein a phase of the second sound wave is opposite to a phase of the first sound wave, and an amplitude of the second sound wave is the same as an amplitude of the first sound wave.
In some embodiments, the noise reduction component includes a sound collector disposed in the flow channel, the sound collector is configured to collect sound waves, and the step of acquiring the first sound waves conducted in the flow channel includes:
and acquiring the first sound wave conducted in the flow channel according to the output signal of the sound collector.
In some embodiments, the plurality of tone generators define a noise reduction zone, and the sound collector is disposed proximate to the noise reduction zone.
In some embodiments, the range hood includes a fan, and the step of acquiring the first sound wave conducted in the flow passage includes:
and acquiring the first sound wave conducted in the flow channel when the fan is started.
The range hood provided by the invention comprises a noise reduction part and a controller, wherein the noise reduction part comprises a cylinder, a noise reduction module and the controller. The cylinder is formed with a flow passage. The amortization module includes a plurality of audio generator, a plurality of audio generator follow the circumference interval of barrel sets up the inner wall of barrel. The controller is used for acquiring a first sound wave conducted in the flow channel; and controlling at least one of the audio generators to generate a second sound wave, wherein the phase of the second sound wave is opposite to the phase of the first sound wave, and the amplitude of the second sound wave is the same as the amplitude of the first sound wave.
In some embodiments, the noise reduction feature includes a sound collector disposed in the flow channel, the sound collector configured to collect sound waves, and the controller configured to:
and acquiring the first sound wave conducted in the flow channel according to the output signal of the sound collector.
In some embodiments, the plurality of tone generators define a noise reduction zone, and the sound collector is disposed proximate to the noise reduction zone.
In some embodiments, the range hood includes a fan, and the controller is configured to:
and acquiring the first sound wave conducted in the flow channel when the fan is started.
In some embodiments, the number of the silencing modules is multiple, and the plurality of the silencing modules are arranged at intervals along the axial direction of the flow passage.
In some embodiments, the noise reduction features further comprise a bulk acoustic dampening element integrally disposed on the inner wall for absorbing sound within the flow path, the bulk acoustic dampening element integrally covering the inner wall.
According to the control method and the range hood provided by the embodiment of the invention, the noise is weakened by controlling the audio generator to generate the sound waves, the noise reduction can be simply and conveniently realized, the noise reduction effect is good, and the improvement of user experience is facilitated.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic perspective view of a range hood according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the range hood of FIG. 1 taken along direction II-II;
FIG. 3 is a perspective view of a noise reduction feature of an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of the noise reduction feature of FIG. 3 taken along the direction IV-IV;
FIG. 5 is a schematic cross-sectional view of the noise reduction feature of FIG. 4 taken along the direction V-V;
FIG. 6 is a schematic diagram of noise reduction of the noise reduction module according to an embodiment of the present invention;
FIG. 7 is a schematic illustration of the noise reduction of a fluffy acoustical element of an embodiment of the present invention;
fig. 8 is a schematic perspective view of a rectifying element according to an embodiment of the present invention;
FIG. 9 is a schematic plan view of a rectifying element according to an embodiment of the present invention;
FIG. 10 is a schematic flow chart of a control method of an embodiment of the present invention;
FIG. 11 is a block schematic diagram of a control method of an embodiment of the invention;
fig. 12 is a schematic view of the noise reduction principle of the hood according to the embodiment of the present invention.
Description of the main element symbols:
the range hood comprises a range hood 1000, a noise reduction part 100, a cylinder 10, a flow passage 12, an exhaust port 122, an inner wall 14, a silencing module 20, an audio generator 22, a noise reduction area 24, a sound collector 30, a fluffy silencing element 40, a silencing surface 42, a rectifying element 50, a rectifying hole 52, a controller 60, a fan 200, thickness A, diameter B, center distance C, a first sound wave X and a second sound wave Y.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
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; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1 and 2, a range hood 1000 according to an embodiment of the present invention includes a noise reduction part 100 and a fan 200.
Referring to fig. 3, 4 and 5, a noise reduction component 100 according to an embodiment of the present invention includes a cylinder 10 and a noise reduction module 20. The cylinder 10 is formed with a flow passage 12. The muffler module 20 includes a plurality of tone generators 22, the plurality of tone generators 22 are disposed at intervals on the inner wall of the cylinder 10 along the circumferential direction of the cylinder 10, wherein when the first sound wave X is conducted in the flow channel 12, the plurality of tone generators 22 are configured to generate a second sound wave Y, the phase of the second sound wave Y is opposite to the phase of the first sound wave X, and the amplitude of the second sound wave Y is the same as the amplitude of the first sound wave X to reduce the loudness formed by the first sound wave X.
According to the noise reduction part 100 and the range hood 1000 provided by the embodiment of the invention, the sound wave generated by the audio generator 22 is utilized to weaken noise, so that noise reduction can be simply and conveniently realized, the noise reduction effect is good, and the user experience is favorably improved.
It can be understood that when the range hood 1000 is in operation, the fan 200 needs to operate at a high speed to form a negative pressure region in a certain spatial range above the range, so as to suck indoor oil smoke gas into the range hood 1000. Therefore, the range hood 1000 may generate a large noise, which affects user experience.
Note that the broken lines in fig. 2 and 4 represent sound waves.
The noise reduction part 100 and the range hood 1000 according to the embodiment of the present invention mainly reduce noise from two aspects, namely, physical noise reduction and electronic noise reduction. Physical noise reduction refers to noise reduction by physical methods such as isolation. Electronic noise reduction is the neutralization of noise by generating a reverse sound wave equal to the ambient noise.
Specifically, in the embodiment of the present invention, the electronic noise reduction is mainly performed by destructively interfering the first sound wave X generated by the range hood 1000 and the second sound wave Y having an opposite phase thereto. Through electronic noise reduction, the noise reduction part 100 and the range hood 1000 of the embodiment of the invention can reduce the noise by at least 8 dB.
In one example, the noise before noise reduction is 50dB, and the noise after noise reduction is 42dB, that is, the noise is reduced by 8 dB; in another example, the noise before noise reduction is 56dB, and the noise after noise reduction is 46dB, that is, the noise is reduced by 10 dB; in yet another example, the noise before noise reduction is 62dB and the noise after noise reduction is 50dB, i.e., the noise is reduced by 12 dB.
Alternatively, the tone generator 22 may be of the magneto-electric, piezoelectric or other type. The tone generator 22 may cause the audio power to vibrate the cone or diaphragm and resonate (resonate) with the surrounding air to produce sound through electromagnetic, piezoelectric, or electrostatic effects.
The cylindrical body 10 may be cylindrical, square cylindrical, or other shapes. The shape of the cylinder 10 is not limited herein.
In some embodiments, the number of the sound deadening modules 20 is plural, and the plural sound deadening modules 20 are provided at intervals in the axial direction of the flow passage 12.
Thus, the noise reduction effect can be better. It will be appreciated that in practical applications, noise will generally remain after a single reduction, and that multiple noise reduction modules 20 spaced axially along the flow passage 12 can be provided to further reduce noise.
In one example, 2 sound attenuation modules 20 are spaced axially along the flow passage 12; in another example, 3 sound attenuation modules 20 are provided at intervals in the axial direction of the flow passage 12; in yet another example, 4 sound attenuation modules 20 are spaced axially along the flow passage 12. For convenience of description, 3 silencing modules 20 are taken as an example in this embodiment. It should be noted that the number of the cancellation modules 20 is not limited herein.
Note that the waveform of the first acoustic wave X at different positions may be different. It can be understood that the waveform of the first sound wave X is changed by the second sound wave Y after the first sound wave X passes through the first sound deadening module 20 and is subjected to the first noise reduction. The waveform of the first sound wave X is changed again after the second noise reduction is performed on the first sound wave X by the second noise reduction module 20. Thus, the waveform of the first acoustic wave X at different positions may be different.
In some embodiments, multiple tone generators 22 are spaced along the same circumference of the barrel 10.
Note that, specifically, the plurality of sound generators 22 of the same sound deadening module 20 are disposed at intervals along the same circumferential direction of the cylinder 10. When the barrel 10 is cylindrical, the plurality of tone generators 22 are arranged in the same circumferential direction of the barrel 10.
In one example, each silencing module 20 includes 6 tone generators 22; in another example, each silencing module 20 includes 8 tone generators 22; in yet another example, each muffler module 20 includes 10 tone generators 22. For convenience of description, each silencing module 20 includes 8 audio generators 22 in this embodiment. It is noted that the number of tone generators 22 included in each of the muting modules 20 is not limited herein.
In some embodiments, the plurality of tone generators 22 are arranged at equal angular intervals along the same circumferential direction.
In this way, the distribution of the second sound wave Y emitted by the tone generator 22 can be made more uniform. It can be understood that a plurality of audio generators 22 are arranged along the same circumferential direction at equal angular intervals, so that the intervals of the plurality of audio generators 22 in the same circumferential direction are consistent and uniformly distributed, and the distribution of the second sound waves Y emitted by the plurality of audio generators 22 is more uniform, so that the noise reduction effect is better.
Of course, the plurality of tone generators 22 may be disposed at unequal angular intervals in the same circumferential direction. There is no limitation on whether the plurality of tone generators 22 are arranged at equal angular intervals in the same circumferential direction.
In some embodiments, the noise reduction member 100 includes a sound collector 3030 disposed in the flow channel 12, and the sound collector 3030 is configured to collect the first sound wave X.
In some embodiments, a plurality of tone generators 22 are enclosed with a noise reduction zone 24, and a sound collector 3030 is disposed proximate to noise reduction zone 24.
Thus, the acquisition of the first sound wave X is realized. It can be appreciated that referring to fig. 6, the audio generator 22 of the noise reduction assembly 100 emits the second sound wave Y opposite in phase to the first sound wave X to make the first sound wave X and the second sound wave Y audio frequency collide with each other, and therefore, the first sound wave X needs to be collected to ascertain the characteristics of the first sound wave X, so that the controller 60 controls the audio generator 22 of the noise reduction assembly 100 to emit the second sound wave Y opposite in phase to the first sound wave X.
Specifically, after the user starts the range hood 1000, the range hood 1000 starts to work and generate noise, the controller 60 controls the sound collector 3030 to collect the first sound wave X, then controls the audio generator 22 to generate the second sound wave Y with the same amplitude and the opposite phase as the first sound wave X according to the first sound wave X, and finally the controller 60 controls the audio generator 22 to emit the second sound wave Y.
In some embodiments, the noise reduction feature 100 further includes a bulk acoustic dampening element 40 integrally disposed on the inner wall 14, the bulk acoustic dampening element 40 for absorbing sound within the flow path 12, the bulk acoustic dampening element 40 integrally covering the inner wall 14.
Thus, noise is further reduced. It will be appreciated that the second sound wave Y emitted by the audio generator 22, which is in phase opposition to the first sound wave X, is primarily intended to reduce the regularity of the noise and/or low frequency noise, but less effective in reducing the noise of sudden and/or high frequency noise. Therefore, a fluffy noise dampening element 40 is required to further treat the noise.
Fig. 7 is a schematic illustration of the noise reduction of the fluffy acoustical element 40 of an embodiment of the present invention. In particular, the fluffy noise reduction element 40 may be made of a material having a relatively low density and having a porous structure, such as sponge, activated carbon, and slag wool. Materials such as sponge, active carbon and mineral wool porous and hole are mostly inside open pore that link up each other, and the sound wave receives air molecule friction and viscous resistance when deepening the hole of material, can make tiny fiber do mechanical vibration to make sound energy change into heat energy, and then realize the effect of making an uproar.
It should be noted that the integral placement of the bulk acoustic suppression element 40 on the inner wall 14 means: the fluffy dampening element 40 substantially completely covers the inner wall 14.
In certain embodiments, the lofty sound attenuating element 40 includes a sound attenuating surface 42, the sound attenuating surface 42 being opposite the inner wall 14; the sound deadening surface 42 is wavy in the circumferential direction of the cylinder 10. Therefore, the noise reduction effect is better.
Further, in some embodiments, the sound attenuating surface 42 is also wavy in the axial direction of the barrel 10.
In some embodiments, a plurality of audio generators 22 are embedded within the lofty sound attenuating element 40. Therefore, the noise reduction effect can be better when the space is reasonably utilized.
In some embodiments, the flow channel 12 is formed with an exhaust opening 122, the noise reduction feature 100 includes a rectifying element 50 disposed adjacent to the exhaust opening 122, the rectifying element 50 is formed with a plurality of rectifying holes 52 in communication with the flow channel 12, and the plurality of rectifying holes 52 are arranged in an array.
Therefore, the plurality of rectifying holes 52 can rectify the flocculated airflow to form a stable airflow, and the amplitude of the sound wave is weakened along with the rectifying process of the airflow, so that the purpose of reducing noise is achieved.
In one example, the rectifying element 50 may be made of activated carbon. The activated carbon is a very fine carbon particle having a large surface area, and thus, the activated carbon can be sufficiently contacted with air. In addition, there are finer pores, capillaries, in the carbon granules. The capillary has strong adsorption capacity, and impurities in the air can be adsorbed when contacting the capillary, so that the air is purified. The activated carbon adsorption method has the advantages of wide application, mature process, safety, reliability and more types of absorbed substances, and the rectifying element 50 made of activated carbon is arranged at the position close to the exhaust port 122, so that the method is simple and convenient, can further reduce noise, and is also favorable for further evolving air and removing peculiar smell.
In addition, the phrase "the plurality of rectifying holes 52 are arranged in an array" may refer to that the plurality of rectifying holes 52 are in a two-dimensional rectangular array with two vertical rows and two vertical axes, may refer to that the plurality of rectifying holes 52 are in a three-dimensional rectangular array with three vertical axes, may refer to that the plurality of rectifying holes 52 are in a circular array with uniform divergence from the center of the circle, and may refer to that the plurality of rectifying holes 52 are in other arrays. The form of the array formed by the plurality of rectifying holes 52 is not limited herein.
The rectifying holes 52 may be circular, square, or any irregular shape. The shape of the rectifier hole 52 is not limited herein.
Referring to fig. 8 and 9, in an example, the rectifying element 50 is a cylinder, the thickness a of the rectifying element 50 is 38-45mm, and the diameter B is 145-150 mm; and/or the cross-sectional area S of each of the rectifying holes 52 is 20-30mm2And the center-to-center distance C between two adjacent rectifying holes 52 is 5-8 mm.
Please note that "the thickness A of the rectifying element 50 is 38-45mm, and the diameter B is 145-150 mm; and/or the cross-sectional area S of each of the rectifying holes 52 is 20-30mm2The center-to-center distance C of two adjacent rectification holes 52 of 5 to 8mm "includes three cases:
in the first case, the thickness A of the rectifying element 50 is 38-45mm, and the diameter B is 145-150 mm;
in the second case, the cross-sectional area S of each of the rectifying holes 52 is 20 to 30mm2The center distance C between two adjacent rectifying holes 52 is 5-8 mm;
in the third case, the thickness A of the rectifying element 50 is 38-45mm, the diameter B is 145-150mm, and the sectional area S of each rectifying hole 52 is 20-30mm2And the center-to-center distance C between two adjacent rectifying holes 52 is 5-8 mm.
In one example, the fairing element 50 has a thickness A of 38mm and a diameter B of 145 mm; in another example, the fairing element 50 has a thickness A of 45mm and a diameter B of 150 mm; in yet another example, the fairing element 50 has a thickness A of 41mm and a diameter B of 147 mm.
In one example, the cross-sectional area S of each of the orifi 52 is 20mm2The center distance C between two adjacent rectifying holes 52 is 5 mm; in another example, the cross-sectional area S of each of the orifi 52 is 30mm2The center distance C between two adjacent rectifying holes 52 is 8 mm; in yet another example, the cross-sectional area S of each of the orifi 52 is 25mm2The center-to-center distance C between two adjacent rectification holes 52 is 6.5 mm.
Referring to fig. 10, the present invention further provides a control method for controlling the range hood. The range hood may be the range hood 1000 described above, and the control method of the present invention will be described in detail below by taking the range hood 1000 described above as an example.
Specifically, the range hood 1000 includes a noise reduction part 100, and the noise reduction part 100 includes a cylinder 10 and a noise reduction module 20. The cylinder 10 is formed with a flow passage 12. The sound attenuation module 20 includes a plurality of sound generators 22, and the plurality of sound generators 22 are disposed at intervals along the circumferential direction of the cylinder 10 on the inner wall 14 of the cylinder 10. The control method comprises the following steps:
s12: acquiring a first sound wave X conducted in the flow channel 12; and
s14: controlling the at least one audio generator 22 to generate a second sound wave Y, wherein the phase of the second sound wave Y is opposite to the phase of the first sound wave X and the amplitude of the second sound wave Y is the same as the amplitude of the first sound wave X.
The range hood 1000 further includes a controller 60, and the controller 60 is configured to obtain the first sound wave X conducted in the flow channel 12; the controller 60 is also configured to control the at least one audio generator 22 to generate a second sound wave Y, wherein the second sound wave Y has a phase opposite to the phase of the first sound wave X and has an amplitude equal to the amplitude of the first sound wave X.
According to the control method and the range hood 1000 provided by the embodiment of the invention, the noise is weakened by controlling the sound wave generated by the audio generator 22, the noise reduction can be simply and conveniently realized, the noise reduction effect is good, and the improvement of user experience is facilitated.
Specifically, in the embodiment of the present invention, the electronic noise reduction is mainly performed by destructively interfering the first sound wave X generated by the range hood 1000 and the second sound wave Y having an opposite phase thereto. Through electronic noise reduction, the noise reduction part 100 and the range hood 1000 of the embodiment of the invention can reduce the noise by at least 8 dB.
In one example, the noise before noise reduction is 50dB, and the noise after noise reduction is 42dB, that is, the noise is reduced by 8 dB; in another example, the noise before noise reduction is 56dB, and the noise after noise reduction is 46dB, that is, the noise is reduced by 10 dB; in yet another example, the noise before noise reduction is 62dB and the noise after noise reduction is 50dB, i.e., the noise is reduced by 12 dB.
In some embodiments, one of the tone generators 22 generates a second sound wave Y when a first sound wave X is conducted in the flow channel 12. In some embodiments, two of the tone generators 22 generate a second sound wave Y when a first sound wave X is conducted in the flow channel 12. Of course, in some embodiments, the number of the tone generators 22 generating the second sound wave Y when the first sound wave X is conducted in the flow channel 12 may be greater than two.
In some embodiments, the noise reduction part 100 includes a sound collector 30 disposed in the flow passage 12, the sound collector 30 is used for collecting sound waves, and the step S12 includes:
the first sound wave X conducted in the flow channel 12 is obtained from the output signal of the sound collector 30.
In some embodiments, the noise reduction part 100 includes a sound collector 30 disposed in the flow channel 12, the sound collector 30 is configured to collect sound waves, and the controller 60 is configured to obtain the first sound waves X conducted in the flow channel 12 according to an output signal of the sound collector 30.
In some embodiments, the plurality of tone generators 22 are enclosed with a noise reduction zone, and the sound collector 30 is disposed proximate to the noise reduction zone.
In this way, the acquisition of the first acoustic wave X in the flow channel 12 is achieved. The principle of operation of the sound collector 30 is to convert fluctuating pressure waves in the air into fluctuating electrical signals. In one example, the sound vibrations are transmitted to the diaphragm of the sound collector 30, thereby pushing the magnet therein to form a varying current, which is transmitted to a subsequent sound processing circuit for amplification, thereby allowing the signal to be measured. In another example, one pole of a capacitor in the sound collector 30 moves in response to sound waves, so that the capacitance of the capacitor changes, which is amplified to produce a measurable signal.
Referring to fig. 11, in some embodiments, the range hood 1000 includes a fan 200, and the step S12 includes:
the first sound wave X conducted in the flow passage 12 is acquired when the blower 200 is turned on.
In some embodiments, the controller 60 is configured to capture the first sound wave X conducted in the flow channel 12 when the fan 200 is turned on.
So, realize acquireing the automatic acquisition of first sound wave X, be favorable to improving smoke ventilator 1000's degree of automation. It can be understood that when the range hood 1000 is in operation, the fan 200 needs to operate at a high speed to form a negative pressure region in a certain spatial range above the range, so as to suck indoor oil smoke gas into the range hood 1000. Therefore, the range hood 1000 may generate a large noise, which affects user experience. That is, when the fan 200 is turned on, the range hood 1000 generates a large noise, and the first sound wave X is conducted in the flow channel 12, so that whether to obtain the first sound wave X conducted in the flow channel 12 can be determined by whether the fan 200 is turned on.
In summary, referring to fig. 12, the range hood 1000 according to the embodiment of the present invention mainly reduces noise through two modes, namely, physical noise reduction and electronic noise reduction. After the user starts the range hood 1000, the range hood 1000 enters a working state and generates noise, and on one hand, physical noise reduction is performed through the fluffy noise reduction element 40; on the other hand, the controller 60 controls the sound collector 30 to collect noise emitted from the range hood 1000, that is, the first sound wave X, then controls the tone generator 22 to generate a second sound wave Y having a phase opposite to that of the first sound wave X according to the first sound wave X, and to emit the second sound wave Y, and the first sound wave X and the second sound wave Y are neutralized due to audio frequency phase-to-phase, thus performing electronic noise reduction. After physical noise reduction and electronic noise reduction, the noise generated by the range hood 1000 can be reduced by at least 8 dB.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A control method for controlling a range hood, the range hood comprising a noise reduction feature, the noise reduction feature comprising:
a cylinder formed with a flow passage; and
the noise reduction module comprises a plurality of audio generators which are arranged on the inner wall of the barrel at intervals along the circumferential direction of the barrel;
the control method comprises the following steps:
acquiring a first sound wave conducted in the flow channel; and
controlling at least one of the audio generators to generate a second sound wave, wherein a phase of the second sound wave is opposite to a phase of the first sound wave, and an amplitude of the second sound wave is the same as an amplitude of the first sound wave.
2. The control method according to claim 1, wherein the noise reduction unit includes a sound collector disposed in the flow channel, the sound collector being configured to collect sound waves, and the step of acquiring the first sound waves conducted in the flow channel includes:
and acquiring the first sound wave conducted in the flow channel according to the output signal of the sound collector.
3. The control method of claim 2, wherein the plurality of tone generators define a noise reduction zone, and the sound collector is disposed adjacent to the noise reduction zone.
4. The control method of claim 1, wherein the range hood includes a fan, and the step of acquiring the first sound wave conducted in the flow path includes:
and acquiring the first sound wave conducted in the flow channel when the fan is started.
5. A range hood, comprising a noise reduction component and a controller, the noise reduction component comprising:
a cylinder formed with a flow passage; and
the noise reduction module comprises a plurality of audio generators which are arranged on the inner wall of the barrel at intervals along the circumferential direction of the barrel;
the controller is used for acquiring a first sound wave conducted in the flow channel; and controlling at least one of the audio generators to generate a second sound wave, wherein the phase of the second sound wave is opposite to the phase of the first sound wave, and the amplitude of the second sound wave is the same as the amplitude of the first sound wave.
6. The range hood of claim 5, wherein the noise reduction feature comprises a sound collector disposed in the flow passage, the sound collector configured to collect sound waves, the controller configured to:
and acquiring the first sound wave conducted in the flow channel according to the output signal of the sound collector.
7. The range hood of claim 6 wherein the plurality of tone generators define a noise reduction zone, and wherein the sound collector is disposed proximate the noise reduction zone.
8. The range hood of claim 5, wherein the range hood comprises a fan, the controller to:
and acquiring the first sound wave conducted in the flow channel when the fan is started.
9. The range hood of claim 5, wherein the number of the silencing modules is multiple, and the plurality of silencing modules are arranged at intervals along the axial direction of the flow passage.
10. The range hood of claim 5 wherein the noise reduction feature further comprises a bulk dampening element integrally disposed on the inner wall, the bulk dampening element for absorbing sound within the flow path, the bulk dampening element integrally covering the inner wall.
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