CN107741045B - Range hood with active noise reduction function - Google Patents
Range hood with active noise reduction function Download PDFInfo
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- CN107741045B CN107741045B CN201711200560.1A CN201711200560A CN107741045B CN 107741045 B CN107741045 B CN 107741045B CN 201711200560 A CN201711200560 A CN 201711200560A CN 107741045 B CN107741045 B CN 107741045B
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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
A range hood with an active noise reduction function is provided with a range hood main body and an active noise reduction device fixedly installed on the range hood main body. The active noise reduction device is provided with: the noise reduction system comprises a first noise sensor, a loudspeaker, a second noise sensor and an active noise reduction system. Compared with the traditional passive noise reduction type range hood, the passive noise reduction type range hood can only reduce noise for sound with higher frequency of more than 500Hz by virtue of good airtightness and materials. This take lampblack absorber of initiative noise reduction function passes through the reverse sound wave that initiative noise reduction device initiative produced and equal with external noise, thereby neutralizes the noise and realizes the effect of making an uproar. The oil smoke particle can not pass through the air draft assembly, and the wind wheel in the air draft assembly does not have oil film adhesion even if the service time is prolonged, and does not need load work, so that the oil smoke particle can always work with low noise. The range hood with the active noise reduction function has the advantage that the noise of different frequencies generated when the range hood works can be greatly reduced.
Description
Technical Field
The invention relates to the field of range hoods, in particular to a range hood with an active noise reduction function.
Background
With the increasing pace of life and work, people need a quieter and more comfortable environment when working, studying and resting, so that noise pollution becomes a main factor influencing the quality of life of people, and when the noise pollution is increasingly serious, the requirement of people on noise reduction control of surrounding contacted electric appliances is higher and higher. The range hood is one of the indispensable electrical apparatus in the family nowadays. The range hood is arranged above a kitchen range hood and used for absorbing oil smoke generated during cooking and discharging the oil smoke out of a room to reduce air pollution of the kitchen. But because the rotation of the wind wheel of lampblack absorber and the vibrations that cause the cigarette machine main part can produce great noise, use when the lampblack absorber for a long time moreover, thick oil film can be attached to the wind wheel in the traditional lampblack absorber, makes the wind wheel heavy burden work, greatly increased the noise of lampblack absorber during operation. The traditional noise reduction mode mainly depends on good airtightness and material characteristics to reduce noise and isolate to a certain extent, and generally only can be used for sound with higher frequency of more than 500 Hz.
Therefore, the curved surface range hood easy to clean is provided aiming at the defects in the prior art, so that the defects in the prior art are necessary to be solved.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides the range hood with the active noise reduction function to solve the defects in the prior art. The range hood with the active noise reduction function can greatly reduce the noise of different frequencies generated when the range hood works.
The above object of the present invention is achieved by the following technical means.
The utility model provides a take lampblack absorber of initiative noise reduction function sets up cigarette machine main part and fixed mounting in the initiative noise reduction device of cigarette machine main part.
Furthermore, the active noise reduction device is provided with a first noise sensor for detecting noise of the noise source, a loudspeaker, a second noise sensor for detecting corrected noise and an active noise reduction system, wherein the active noise reduction system is respectively in electric signal connection with the first noise sensor, the loudspeaker and the second noise sensor.
Respectively defining the distances from the first noise sensor, the loudspeaker and the second noise sensor to the noise source as LFirst noise sensor、LLoudspeaker、LSecond noise sensor(ii) a And L isSecond noise sensor>LLoudspeaker,LSecond noise sensor>LFirst noise sensor，LFirst noise sensor≥0。
Preferably, the cigarette machine main body is provided with a shell; the outer surface of the housing serves as a guide surface for the moving direction of the soot, rather than forming a hood region for gathering the soot. At least one air inlet group is arranged at the position of the non-covering area of the shell.
The oil smoke moves along the outer surface of the shell and is sucked into an air duct in the main body of the range hood by at least one air inlet group arranged in a non-covering area.
The shell is provided with n air inlet groups, each air inlet group is respectively communicated with the same end part of the air channel in the shell, and each air inlet group is of a single-hole structure or a porous structure. The central point of each air inlet group is P0、P1、……、Pi、……、Pn-1(ii) a N is more than or equal to 2, i is more than or equal to 1 and less than or equal to n-1, and both i and n are positive integers, and any one central point P in the lowest position of the central points of the air inlet groups is taken as the central point0And establishing a three-dimensional coordinate system for the origin. In passing through P0And in a plane parallel to the horizontal plane, passing through P0And two mutually perpendicular straight lines are defined as X-axis and Y-axis, which will pass through P0And a line perpendicularly intersecting the X-axis and the Y-axis, respectively, is defined as a Z-axis, P0Coordinate in three-dimensional coordinate system is P0(X0,Y0,Z0)＝P0(0,0,0)。
Preferably, the coordinate of the central point of the n air inlet sets on the three-dimensional coordinate axis is P0(0,0,0)、P1(X1,Y1,Z1)、……、Pi(Xi,Yi,Zi)、……、Pn-1(Xn-1,Yn-1,Zn-1)，P0(0,0,0)≠Pi(Xi,Yi,Zi) And P isiTo Pn-1At least one of which is not 0.
Preferably, the cigarette machine main body is further provided with n air inlet surfaces, the n air inlet surfaces are spliced to form the shell, and each air inlet surface is provided with a corresponding air inlet group. n air inlet surfaces are respectively defined as S0、S1、...、Si、...、Sn-1Center point P of n air inlet sets0、P1、...、Pi、...、Pn-1Are respectively located at S0、S1、...、Si、...、Sn-1。
Preferably, the air channel is provided with a plurality of air pipes and an air draft assembly, and the plurality of air pipes and the air draft assembly are respectively and fixedly arranged inside the shell. The multi-air pipe comprises a cleaning air inlet pipe and an oil smoke air inlet pipe, the cleaning air inlet pipe is communicated with the air inlet end of the air draft assembly in a seamless mode, and the oil smoke air inlet pipe is communicated with the smoke exhaust port of the range hood. The air inlet group is provided with a cleaning air inlet group communicated with the cleaning air inlet pipe and an oil smoke air inlet group communicated with the oil smoke air inlet pipe.
Defining the shell highest point as PmCoordinate is Pm(Xm,Ym,Zm) (ii) a The central point of the clean air inlet group is PClean air inlet groupCoordinate is PClean air inlet group(XClean air inlet group,YClean air inlet group,ZClean air inlet group) The central point of the oil smoke air inlet group is POil smoke air inlet groupCoordinate is POil smoke air inlet group(XOil smoke air inlet group,YOil smoke air inlet group,ZOil smoke air inlet group)，0.5≤ZClean air inlet group/Zm≤1，0≤ZOil smoke air inlet group/ZmLess than or equal to 0.5, and ZOil smoke air inlet group＜ZClean air inlet group。
Preferably, above-mentioned convulsions subassembly is provided with motor, wind wheel and spiral case, and motor fixed connection is in the top of wind wheel, and motor and wind wheel fixed connection are in the inside of spiral case, and spiral case fixed mounting is inside the shell, and the inlet end and the clean air-supply line of spiral case are seamless to be communicated.
Preferably, the first noise sensor is mounted on an outer surface of the motor.
Furthermore, a loudspeaker and an error feedback device acoustic sensor are respectively fixed at the joint of the oil smoke air inlet group and the oil smoke air inlet pipe; or
The loudspeaker and the error feedback device acoustic sensor are respectively fixed at the joint of the clean air inlet group and the clean air inlet pipe; or
The loudspeaker and the error feedback device acoustic sensor are respectively fixed at the air inlet end of the volute; or
The loudspeaker and the error feedback device acoustic sensor are respectively fixed at the smoke outlet; or
The speaker and the error feedback device acoustic sensor are respectively fixed on the inner surface of the volute.
Still be provided with passive noise reduction device, passive noise reduction device fixed mounting is in the cigarette machine main part.
Preferably, the passive noise reduction device is a noise reduction material, and the noise reduction material is at least one of filled in the air draft assembly, attached to the outer surface of the volute casing or attached to the inner surface of the casing; or
The passive noise reduction device is a noise reduction device which is fixedly arranged at least one of the connection parts of the air inlet end of the volute and the clean air inlet pipe.
Preferably, the outer shell is a sphere, an ellipsoid, a cone or a partial sphere.
The invention relates to a range hood with an active noise reduction function. The active noise reduction device is provided with: the noise reduction system comprises a first noise sensor, a loudspeaker, a second noise sensor and an active noise reduction system. Compared with the traditional range hood adopting the passive noise reduction mode, the traditional passive noise reduction mode can only reduce noise for sound with higher frequency of more than 500Hz by good airtightness and materials. This take lampblack absorber of initiative noise reduction function passes through the reverse sound wave that initiative noise reduction device initiative produced and equal with external noise, thereby neutralizes the noise and realizes the effect of making an uproar. The oil smoke particle can not pass through the air draft assembly, and the wind wheel in the air draft assembly does not have oil film adhesion even if the service time is prolonged, and does not need load work, so that the oil smoke particle can always work with low noise. The range hood with the active noise reduction function has the advantage that the noise of different frequencies generated when the range hood works can be greatly reduced.
Drawings
The invention is further illustrated by means of the attached drawings, the content of which is not in any way limiting.
Fig. 1 is a schematic structural diagram of an active noise reducer device of a range hood with an active noise reduction function according to the present invention.
Fig. 2 is a schematic structural diagram of an embodiment 1 of the range hood with an active noise reduction function according to the present invention.
Fig. 3 is a schematic structural diagram of an embodiment 2 of the range hood with an active noise reduction function of the present invention.
Fig. 4 is a schematic structural diagram of an embodiment 3 of the range hood with an active noise reduction function of the present invention.
Fig. 5 is a schematic structural diagram of an embodiment 4 of the range hood with an active noise reduction function of the present invention.
Fig. 6 is a schematic structural diagram of an embodiment 5 of the range hood with an active noise reduction function of the present invention.
In fig. 1 to 6, there are included:
a main body 100 of the cigarette machine,
A shell 110, a cleaning air inlet group 111, a lampblack air inlet group 112,
An air draft assembly 120, a volute 121, a wind wheel 122, a motor 123,
An air pipe 130, a clean air inlet pipe 131, a lampblack air inlet pipe 132,
A smoke outlet 140,
An active noise reduction device 200,
A first noise sensor 210, a speaker 220, a second noise sensor 230, an active noise reduction system 240, and a passive noise reduction device 300.
Detailed Description
The invention is further described with reference to the following examples.
Example 1.
A range hood with an active noise reduction function is provided with a range hood main body 100 and an active noise reduction device 200 fixedly arranged on the range hood main body 100, as shown in figures 1 and 2.
The active noise reduction device 200 is provided with a first noise sensor 210 for detecting noise of a noise source, a speaker, a second noise sensor 230 for detecting noise after correction, and an active noise reduction system 240, and the active noise reduction system 240 is electrically connected to the first noise sensor 210, the speaker, and the second noise sensor 230, respectively.
A first noise sensor 210 for collecting the wave frequency of the noise source and transmitting a signal to the active noise reduction system 240240.
A speaker for receiving the signal of the active noise reduction system 240 and generating sound waves in a direction opposite to the noise source.
The second noise sensor 230 is used for detecting the performance of the active noise reduction system 240 and modifying the algorithm of the active noise reduction system 240 to perform signal feedback on the active noise reduction system 240.
And the active noise reduction system 240 is configured to receive the wave frequency of the noise source transmitted by the first noise sensor 210 and receive the signal of the second noise sensor 230, perform an operation, and output a signal to the speaker.
Distances from the first noise sensor 210, the speaker, and the second noise sensor 230 to the noise source are respectively defined as LFirst noise sensor 210、LLoudspeaker、LSecond noise sensor 230(ii) a And L isSecond noise sensor 230>LLoudspeaker,LSecond noise sensor 230>LFirst noise sensor 210，LFirst noise sensor 210≥0。
The cigarette maker body 100 is provided with an outer shell 110. The outer surface of the housing 110 serves as a guide surface in the moving direction of the soot, rather than forming a hood region for gathering the soot. There is at least one air intake assembly located in the non-shrouded region of the housing 110. The fumes travel along the outer surface of the outer shell 110 and are drawn into the air channel inside the main body 100 of the cigarette maker by at least one air inlet set disposed at a non-covered area position. The housing 110 of the present invention may be shaped as a sphere.
The housing 110 is provided with n air inlet groups, each air inlet group is respectively communicated with the same end part of the air duct inside the housing 110, and each air inlet group is of a single-hole structure or a multi-hole structure. The central point of each air inlet group is P0、P1、……、Pi、……、Pn-1(ii) a N is more than or equal to 2, i is more than or equal to 1 and less than or equal to n-1, and both i and n are positive integers, and any one central point P in the lowest position of the central points of the air inlet groups is taken as the central point0And establishing a three-dimensional coordinate system for the origin. In passing through P0And in a plane parallel to the horizontal plane, passing through P0And two mutually perpendicular straight lines are defined as X-axis and Y-axis, which will pass through P0And a line perpendicularly intersecting the X-axis and the Y-axis, respectively, is defined as a Z-axis, P0Coordinate in three-dimensional coordinate system is P0(X0,Y0,Z0)＝P0(0,0,0)。
The coordinate of the central point of the n air inlet groups on the three-dimensional coordinate axis is P0(0,0,0)、P1(X1,Y1,Z1)、……、Pi(Xi,Yi,Zi)、……、Pn-1(Xn-1,Yn-1,Zn-1)，P0(0,0,0)≠Pi(Xi,Yi,Zi) And P isiTo Pn-1At least one of which is not 0. The cigarette machine main body 100 is further provided with n air inlet surfaces, the n air inlet surfaces are spliced to form the shell 110, and each air inlet surface is provided with a corresponding air inlet group. n air inlet surfaces are respectively defined as S0、S1、...、Si、...、Sn-1Center point P of n air inlet sets0、P1、...、Pi、...、Pn-1Are respectively located at S0、S1、...、Si、...、Sn-1。
The air duct is provided with a plurality of air pipes 130 and an air draft assembly 120, and the plurality of air pipes 130 and the air draft assembly 120 are respectively and fixedly installed inside the shell 110. The multi-air pipe 130 comprises a cleaning air inlet pipe 131 and an oil smoke air inlet pipe 132, the cleaning air inlet pipe 131 is communicated with the air inlet end of the air draft assembly 120 in a seamless mode, and the oil smoke air inlet pipe 132 is communicated with the smoke outlet 140 of the range hood. The air inlet group is provided with a cleaning air inlet group 111 for communicating with the cleaning air inlet pipe 131 and a lampblack air inlet group 112 for communicating with the lampblack air inlet pipe 132.
Defining the highest point of the housing 110 as PmCoordinate is Pm(Xm,Ym,Zm) (ii) a The central point of the clean air inlet group 111 is PClean air intake group 111Coordinate is PClean air intake group 111(XClean air intake group 111,YClean air intake group 111,ZClean air intake group 111) The central point of the oil smoke inlet set 112 is POil smoke air inlet set 112Coordinate is POil smoke air inlet set 112(XOil smoke air inlet set 112,YOil smoke air inlet set 112,ZOil smoke air inlet set 112)，0.5≤ZClean air intake group 111/Zm≤1，0≤ZOil smoke air inlet set 112/ZmLess than or equal to 0.5, and ZOil smoke air inlet set 112＜ZCleaning inletAnd a tuyere group 111.
The air draft assembly 120 is provided with a motor 123, a wind wheel 122 and a volute 121, the motor 123 is fixedly connected above the wind wheel 122, the motor 123 and the wind wheel 122 are fixedly connected inside the volute 121, the volute 121 is fixedly installed inside the casing 110, and the air inlet end of the volute 121 is in seamless communication with the cleaning air inlet pipe 131.
The first noise sensor 210 of the present embodiment is mounted on the outer surface of the motor 123, and the speaker and the error backhoe acoustic sensor are respectively fixed on the inner surface of the scroll casing 121.
The active noise reduction device 200 of the present invention operates as follows: the first noise sensor 210 collects noise, the active noise reduction system 240 is provided with a microprocessor, the microprocessor calculates the wave frequency of the collected noise sound wave in real time, and outputs a loudspeaker to the loudspeaker 220 to enable the loudspeaker 220 to generate sound waves which are opposite to the sound waves at 180 degrees, and the two sound waves are combined to cancel the noise. The second noise sensor 230 is used to detect the performance of the active noise reduction system 240, modify the algorithm of the active noise reduction system 240 and perform signal feedback on the active noise reduction system 240, and the active noise reduction system 240 receives the signal and outputs the signal to the speaker again. The invention realizes the effect of noise reduction by reducing the noise from the sound source, then enabling the loudspeaker to generate reverse sound waves equal to the external noise, and neutralizing the noise. The active noise reduction method can actively reduce broadband noise (broadband noise) and line spectrum noise (tonal noise) generated when the range hood works.
Meanwhile, the air draft assembly 120 of the present invention is only communicated with the clean air inlet set 111 and the clean air inlet pipe 131, and the lampblack air inlet set 112 and the lampblack air inlet pipe 132 are connected with the smoke outlet 140. The horizontal position of the oil smoke inlet set 112 is lower than that of the clean inlet, so that the oil smoke inlet set 112 preferentially absorbs the oil smoke gas located below, and the oil smoke gas is directly discharged to the smoke outlet 140 through the oil smoke inlet pipe 132 without passing through the ventilation assembly 120. The air draft assembly 120 directly sucks clean air from the square clean air inlet group 111, so that the wind wheel 122 of the air draft assembly 120 can be kept clean all the time, the air draft assembly is not used for load bearing work, and the work noise can be greatly reduced.
It should be noted that the speaker and the error feedback device acoustic sensor of the present invention are installed in various forms, specifically as follows: 1. the speaker and the error backhoe acoustic sensor are fixed to the inner surface of the scroll 121, respectively, and this form is preferred. 2. The speaker and the error feedback acoustic sensor are respectively fixed at the connection of the soot air intake set 112 and the soot air intake duct 132. 3. The speaker and the error feedback acoustic sensor are respectively fixed at the connection of the clean air intake group 111 and the clean air intake duct 131. 4. The speaker and the error backhoe acoustic sensor are fixed to the air intake end of the volute 121, respectively. 5. The speaker and the error backhoe acoustic sensor are respectively fixed to the smoke vent 140. The form 1 is an installation form of the present embodiment, and is preferable, and may be any one of 2 to 5, and the specific embodiment is subject to actual operation.
It should be noted that the hood region of the hood housing 110 refers to a smoke collecting region formed by the hood housing 110, and smoke generated by the stove below the hood mainly enters the smoke collecting region due to the hood region, is sucked into the air channel through the air inlet disposed above the hood region, and is finally discharged from the smoke outlet 140. In the range hood of the invention, the shell 110 is not used for forming a smoke gathering area, but used for forming an attached guide surface for moving oil smoke, and the oil smoke is not gathered in a space formed by the shell 110 and then is sucked away, but is moved from bottom to top along the surface of the shell 110 and is sucked into an air channel by a nearby air inlet group. Therefore, the non-covered region in the present invention is a region of the casing 110120 that is not intended to collect soot, as compared with the covered region in the related art.
Compared with the traditional passive noise reduction mode range hood, the traditional passive noise reduction mode range hood with the active noise reduction function only can reduce noise for sound with higher frequency of more than 500Hz by good airtightness and materials. This take lampblack absorber of initiative noise reduction function initiatively produces the reverse sound wave that equals with external noise through initiative noise reduction device 200, thereby neutralizes the noise and realizes the effect of making an uproar. The range hood of the present invention can make the oil smoke particles not pass through the ventilation assembly 120, and the wind wheel 122 in the ventilation assembly 120 has no oil film adhesion even if the use time is increased, and does not need load work, so that the low noise work can be always kept. The range hood with the active noise reduction function has the advantage that the noise of different frequencies generated when the range hood works can be greatly reduced.
Example 2.
A lampblack absorber with an active noise reduction function is shown in fig. 3, and other characteristics are the same as those of embodiment 1, except that a passive noise reduction device 300 is further arranged, the passive noise reduction device 300 of the embodiment is made of a noise reduction material, and the noise reduction material is filled in an air draft assembly 120.
It should be noted that the passive noise-reduction device 300 of the present embodiment may be one or both of a noise-reduction material and a noise-reduction device. The noise reduction material may be preferably disposed to fill the interior of the louver assembly 120, or may be attached to at least one of the outer surface of the louver assembly 120 and the outer case 110.
In the embodiment, active noise reduction is used as a main part, and passive noise reduction is used as an auxiliary part. The active noise reduction counteracts most of noise, and the noise reduction material is additionally arranged to absorb a small part of the remaining wave frequency noise.
Compared with the traditional passive noise reduction mode range hood, the traditional passive noise reduction mode only can reduce noise for sound with higher frequency of more than 500Hz by good airtightness and materials. This take lampblack absorber of initiative noise reduction function initiatively produces the reverse sound wave that equals with external noise through initiative noise reduction device 200, thereby neutralizes the noise and realizes the effect of making an uproar. The range hood of the present invention can make the oil smoke particles not pass through the ventilation assembly 120, and the wind wheel 122 in the ventilation assembly 120 has no oil film adhesion even if the use time is increased, and does not need load work, so that the low noise work can be always kept. The range hood with the active noise reduction function has the advantage that the noise of different frequencies generated when the range hood works can be greatly reduced.
Example 3.
A range hood with an active noise reduction function is shown in figure 4, and other characteristics are the same as those of embodiment 1, except that a passive noise reduction device 300 is further arranged and fixedly arranged at the joint of an air inlet end of a volute 121 and a clean air inlet pipe 131, and the noise reduction device of the embodiment can be a spring or other noise reduction devices.
In the embodiment, active noise reduction is used as a main part, passive noise reduction is used as an auxiliary part, and the noise reduction device can reduce the vibration generated when the air draft assembly 120 works, so that the noise is reduced.
The air draft assembly 120 is a main vibration source of the range hood, and when the air inlet end of the volute 121 is fixedly connected with a noise reduction device at the joint of the cleaning air inlet pipe 131, the air draft assembly 120 and the external joint can be buffered, so that the overall noise of the range hood is reduced.
Compared with the traditional passive noise reduction mode range hood, the traditional passive noise reduction mode only can reduce noise for sound with higher frequency of more than 500Hz by good airtightness and materials. This take lampblack absorber of initiative noise reduction function initiatively produces the reverse sound wave that equals with external noise through initiative noise reduction device 200, thereby neutralizes the noise and realizes the effect of making an uproar. The range hood of the present invention can make the oil smoke particles not pass through the ventilation assembly 120, and the wind wheel 122 in the ventilation assembly 120 has no oil film adhesion even if the use time is increased, and does not need load work, so that the low noise work can be always kept. The range hood with the active noise reduction function has the advantage that the noise of different frequencies generated when the range hood works can be greatly reduced.
Example 4.
A range hood with an active noise reduction function is shown in figure 5, and other characteristics are the same as those of embodiment 1, except that a loudspeaker and an error feedback device acoustic sensor are respectively fixed at the connection part of a clean air inlet group 111 and a clean air inlet pipe 131.
Compared with the traditional passive noise reduction mode range hood, the traditional passive noise reduction mode only can reduce noise for sound with higher frequency of more than 500Hz by good airtightness and materials. This take lampblack absorber of initiative noise reduction function initiatively produces the reverse sound wave that equals with external noise through initiative noise reduction device 200, thereby neutralizes the noise and realizes the effect of making an uproar. The range hood of the present invention can make the oil smoke particles not pass through the ventilation assembly 120, and the wind wheel 122 in the ventilation assembly 120 has no oil film adhesion even if the use time is increased, and does not need load work, so that the low noise work can be always kept. The range hood with the active noise reduction function has the advantage that the noise of different frequencies generated when the range hood works can be greatly reduced.
Example 5.
A range hood with an active noise reduction function is shown in figure 6, and other characteristics are the same as those of embodiment 1, except that a passive noise reduction device 300 is further arranged, and the embodiment is simultaneously provided with a noise reduction material and a noise reduction device. The noise reduction device is fixedly arranged at the joint of the air inlet end of the volute 121 and the cleaning air inlet pipe 131 and is a spring. Noise reduction material is filled inside the ventilation assembly 120. The overall noise reduction effect of this example is better than that of examples 1, 2, 3 and 4.
Compared with the traditional passive noise reduction mode range hood, the traditional passive noise reduction mode only can reduce noise for sound with higher frequency of more than 500Hz by good airtightness and materials. This take lampblack absorber of initiative noise reduction function initiatively produces the reverse sound wave that equals with external noise through initiative noise reduction device 200, thereby neutralizes the noise and realizes the effect of making an uproar. The range hood of the present invention can make the oil smoke particles not pass through the ventilation assembly 120, and the wind wheel 122 in the ventilation assembly 120 has no oil film adhesion even if the use time is increased, and does not need load work, so that the low noise work can be always kept. The range hood with the active noise reduction function has the advantage that the noise of different frequencies generated when the range hood works can be greatly reduced.
Example 6.
The other characteristics of the range hood with the active noise reduction function are the same as those of the embodiment 1, except that the outer shell 110 of the embodiment is an ellipsoid.
The housing 110 of the present invention may be an ellipsoid, a sphere, a cone, or a partial sphere. The shape of the housing 110 does not affect the noise reduction effect of the present invention, and can beautify the kitchen environment.
Compared with the traditional passive noise reduction mode range hood, the traditional passive noise reduction mode only can reduce noise for sound with higher frequency of more than 500Hz by good airtightness and materials. This take lampblack absorber of initiative noise reduction function initiatively produces the reverse sound wave that equals with external noise through initiative noise reduction device 200, thereby neutralizes the noise and realizes the effect of making an uproar. The range hood of the present invention can make the oil smoke particles not pass through the ventilation assembly 120, and the wind wheel 122 in the ventilation assembly 120 has no oil film adhesion even if the use time is increased, and does not need load work, so that the low noise work can be always kept. The range hood with the active noise reduction function has the advantage that the noise of different frequencies generated when the range hood works can be greatly reduced.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (9)
1. The utility model provides a take lampblack absorber of initiative noise reduction function which characterized in that: the smoke ventilator is provided with a smoke ventilator main body and an active noise reduction device fixedly arranged on the smoke ventilator main body;
the cigarette machine main body is provided with a shell;
the outer surface of the shell is used as a guide surface of the oil smoke moving direction, and is not provided with a covering area for gathering the oil smoke;
at least one air inlet group is positioned in the position of a non-covering area of the shell;
the oil smoke moves along the outer surface of the shell and is sucked into an air duct in the main body of the range hood by at least one air inlet group arranged in a non-covering area;
the shell is provided with n air inlet groups, each air inlet group is respectively communicated with the same end part of an air channel in the shell, and each air inlet group is of a single-hole structure or a porous structure;
the central point of each air inlet group is P0、P1、……、Pi、……、Pn-1(ii) a N is more than or equal to 2, i is more than or equal to 1 and less than or equal to n-1, and i and n are bothPositive integer, using any center point P in the lowest position of the center point of the air inlet group0，Establishing a three-dimensional coordinate system for the origin;
in passing through P0And in a plane parallel to the horizontal plane, passing through P0And two mutually perpendicular straight lines are defined as X-axis and Y-axis, which will pass through P0And a line perpendicularly intersecting the X-axis and the Y-axis, respectively, is defined as a Z-axis, P0Coordinate in three-dimensional coordinate system is P0(X0,Y0,Z0)＝P0(0,0,0)；
The coordinate of the central point of the n air inlet groups on the three-dimensional coordinate axis is P0(0,0,0)、P1(X1,Y1,Z1)、……、Pi(Xi,Yi,Zi)、……、Pn-1(Xn-1,Yn-1,Zn-1)，P0(0,0,0)≠Pi(Xi,Yi,Zi) And P isiTo Pn-1Has at least one Z-axis coordinate other than 0;
the cigarette machine main body is also provided with n air inlet surfaces which are spliced to form the shell, and each air inlet surface is provided with a corresponding air inlet group;
n air inlet surfaces are respectively defined as S0、S1、...、Si、...、Sn-1Center point P of n air inlet sets0、P1、...、Pi、...、Pn-1Are respectively located at S0、S1、...、Si、...、Sn-1(ii) a The air duct is provided with a plurality of air pipes and an air draft assembly, and the air pipes and the air draft assembly are respectively and fixedly arranged inside the shell; the multi-air pipe comprises a cleaning air inlet pipe and an oil smoke air inlet pipe, the cleaning air inlet pipe is communicated with the air inlet end of the air draft assembly in a seamless mode, and the oil smoke air inlet pipe is communicated with the smoke exhaust port of the range hood.
2. A range hood with active noise reduction function according to claim 1, characterized in that: the active noise reduction device is provided with a first noise sensor for detecting noise of a noise source, a loudspeaker, a second noise sensor for detecting corrected noise and an active noise reduction system;
the active noise reduction system is respectively connected with the first noise sensor, the loudspeaker and the second noise sensor through electric signals.
3. A range hood with active noise reduction function as claimed in claim 2, wherein: respectively defining the distances from the first noise sensor, the loudspeaker and the second noise sensor to the noise source as LFirst noise sensor、LLoudspeaker、LSecond noise sensor(ii) a And L isSecond noise sensor>LLoudspeaker,LSecond noise sensor>LFirst noise sensor，LFirst noise sensor≥0。
4. A range hood with active noise reduction function according to claim 3, characterized in that:
the air inlet group is provided with a cleaning air inlet group communicated with the cleaning air inlet pipe and an oil smoke air inlet group communicated with the oil smoke air inlet pipe;
defining the shell highest point as PmCoordinate is Pm(Xm,Ym,Zm) (ii) a The central point of the clean air inlet group is PClean air inlet groupCoordinate is PClean air inlet group(XClean air inlet group,YClean air inlet group,ZClean air inlet group) The central point of the oil smoke air inlet group is POil smoke air inlet groupCoordinate is POil smoke air inlet group(XOil smoke air inlet group,YOil smoke air inlet group,ZOil smoke air inlet group)，0.5≤ZClean air inlet group/Zm≤1，0≤ZOil smoke air inlet group/ZmLess than or equal to 0.5, and ZOil smoke air inlet group＜ZClean air inlet group；
The air draft assembly is provided with a motor, a wind wheel and a volute, the motor is fixedly connected above the wind wheel, the motor and the wind wheel are fixedly connected inside the volute, the volute is fixedly installed inside the shell, and the air inlet end of the volute is communicated with the cleaning air inlet pipe in a seamless mode.
5. A range hood with an active noise reduction function according to claim 4, wherein: the first noise sensor is mounted on the outer surface of the motor.
6. A range hood with an active noise reduction function according to claim 5, wherein: the loudspeaker and the error feedback device acoustic sensor are respectively fixed at the joint of the oil smoke air inlet group and the oil smoke air inlet pipe; or
The loudspeaker and the error feedback device acoustic sensor are respectively fixed at the joint of the clean air inlet group and the clean air inlet pipe; or
The loudspeaker and the error feedback device acoustic sensor are respectively fixed at the air inlet end of the volute; or
The loudspeaker and the error feedback device acoustic sensor are respectively fixed at the smoke outlet; or
The speaker and the error feedback device acoustic sensor are respectively fixed on the inner surface of the volute.
7. A range hood with an active noise reduction function according to claim 6, wherein: still be provided with passive noise reduction device, passive noise reduction device fixed mounting is in the cigarette machine main part.
8. A range hood with an active noise reduction function according to claim 7, wherein: the passive noise reduction device is made of noise reduction materials, and the noise reduction materials are respectively filled in at least one of the interior of the air draft assembly, the exterior surface of the volute or the interior surface of the shell; or
The passive noise reduction device is a noise reduction device which is fixedly arranged at least one of the connection parts of the air inlet end of the volute and the clean air inlet pipe.
9. A range hood with active noise reduction function according to claim 8, characterized in that: the shell is a sphere, an ellipsoid, a cone or a partial sphere.
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| CN201711200560.1A CN107741045B (en) | 2017-11-27 | 2017-11-27 | Range hood with active noise reduction function |
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| CN108253493B (en) * | 2018-03-07 | 2022-12-30 | 佛山市云米电器科技有限公司 | Speed-adjustable range hood |
| CN108266770B (en) * | 2018-03-07 | 2023-01-03 | 佛山市云米电器科技有限公司 | Range hood with oil smoke subassembly in various temperature fields |
| CN108224524B (en) * | 2018-03-07 | 2023-01-03 | 佛山市云米电器科技有限公司 | Self-cleaning type range hood |
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| CN108534196B (en) * | 2018-03-08 | 2019-12-03 | 佛山市云米电器科技有限公司 | The cooking apparatus and its interlock method of noise reduction system and vision detection system linkage |
| CN110701649A (en) * | 2018-07-10 | 2020-01-17 | 佛山市顺德区合捷电器实业有限公司 | Control method and range hood |
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| CN108731075B (en) * | 2018-07-14 | 2024-01-09 | 佛山市云米电器科技有限公司 | Range hood with multilayer diversion noise filtering device |
| CN112240582B (en) * | 2020-09-15 | 2021-11-26 | 宁波方太厨具有限公司 | Fan, range hood and noise reduction method of fan |
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