Range hood control method and range hood equipment

Abstract

The invention relates to the field of extractor hood equipment, in particular to an extractor hood control method and extractor hood equipment. Fitting the vibration data into an amplitude-time curve; fourier transform is carried out on the amplitude-time curve to obtain a first frequency spectrum curve of the fan; obtaining vibration data of the interception module based on the preset working power; fitting the vibration data into an amplitude-time curve; fourier transform is carried out on the vibration amplitude-time curve to obtain a second frequency spectrum curve of the interception module; judging whether the first spectrum curve and the second spectrum curve have an overlapping region or not; if yes, the preset working power is adjusted, so that the overlapping area is reduced. The working power of the interception module is adjusted to reduce the overlapping area of the frequency spectrum curve of the fan and the frequency spectrum curve of the interception module, so that the influence of coherence between the noise of the fan and the noise of the interception module is reduced, and the decibel value of the noise generated when the range hood works is reduced.

Description

Technical Field

[0001] The present application relates to the field of range hood equipment, and in particular to a range hood control method and range hood equipment. Background Art

[0002] As people's living standards improve, range hoods are becoming more and more popular. Users use range hoods to discharge the fumes generated during cooking to purify indoor air. Ideally, the fume particles enter the range hood with the air. Then, the range hood intercepts and separates the fume particles through the filter, impeller and other components, so that the fume particles flow into the oil cup after condensation. However, in actual work, the oil viscosity of the fume particles is relatively high, which makes it easy for the fume particles to adhere to the impeller, volute and other components after condensation. If the range hood is not cleaned for a long time, grease or oil film will form on the impeller, volute and other components, thereby reducing the performance of the fan and increasing the probability of fume particles escaping.

[0003] At present, in the prior art, an oil mist interception module is provided in the range hood to reduce the probability of oil mist particles escaping. Among them, the oil mist interception module includes an interception motor and an oil mist interception disk. Specifically, the interception motor drives the oil mist interception disk to rotate at a high speed to increase the speed difference between the spokes on the oil mist interception disk and the oil mist particles, thereby increasing the collision probability of the oil mist particles. After the oil mist particles are collided and intercepted by the spokes in the oil mist interception disk, they are thrown out to the outer edge with the spokes under the action of centrifugal force, and finally converge into the oil cup.

[0004] However, the fan and oil mist interception module on the range hood will vibrate when working, and will generate noise accordingly. When the frequency of the noise generated by the fan is close to the frequency of the noise generated by the oil mist interception module, coherence will occur, which will cause the noise generated by the fan and the oil mist interception module to be superimposed in a specific frequency band, and the decibel value of the noise will be significantly increased, affecting the user experience. Summary of the invention

[0005] The embodiments of the present application provide a range hood control method and a range hood device, which aim to solve the problem that the noise decibel value of the range hood is significantly increased due to the noise coherence generated by the fan and the oil mist interception module.

[0006] In a first aspect, an embodiment of the present application provides a range hood control method, which includes: Acquire the first vibration data of the fan within a preset time; fitting the first vibration data into a first amplitude-time curve; Performing Fourier transformation on the first amplitude-time curve to obtain a first amplitude-frequency curve of the fan within the preset time; Acquire second vibration data of the oil mist interception module within the preset time at the preset working power; fitting the second vibration data into a second amplitude-time curve; Performing Fourier transformation on the second amplitude-time curve to obtain a second amplitude-frequency curve of the oil mist interception module within the preset time; Determine whether there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve; If so, the preset working power is adjusted according to the preset power gain value so that the overlapping area is reduced.

[0007] Optionally, determining whether there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve includes: Determine the main peak frequency band of the fan within the preset time according to the amplitude peak value in the first amplitude-frequency curve and the preset amplitude threshold; Determine the main peak frequency band of the oil mist interception module within the preset time according to the amplitude peak value in the second amplitude-frequency curve and the preset amplitude threshold; It is determined whether there is an overlapping area between the main peak frequency band of the fan within the preset time and the main peak frequency band of the oil mist interception module within the preset time.

[0008] Optionally, determining the main peak frequency band of the fan within the preset time according to the amplitude peak value in the first amplitude-frequency curve and a preset amplitude threshold includes: Calculating the product of the amplitude peak value in the first amplitude-frequency curve and the preset amplitude threshold to obtain a first amplitude; Determine the starting frequency and ending frequency of the main peak frequency band of the fan within the preset time according to the frequency corresponding to the first amplitude; Determine the main peak frequency band of the fan within the preset time according to the starting frequency and the ending frequency of the main peak frequency band of the fan within the preset time; The determining of the main peak frequency band of the oil mist interception module within the preset time according to the amplitude peak value in the second amplitude-frequency curve and the preset amplitude threshold comprises: Calculate the product of the amplitude peak value in the second amplitude-frequency curve and the preset amplitude threshold to obtain a second amplitude; Determine the starting frequency and ending frequency of the main peak frequency band of the oil mist interception module within the preset time according to the frequency corresponding to the second amplitude; The main peak frequency band of the oil mist interception module within the preset time is determined according to the starting frequency and the ending frequency of the main peak frequency band within the preset time.

[0009] Optionally, determining whether there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve includes: Obtaining the frequency corresponding to the amplitude peak from the first amplitude-frequency curve to obtain the resonant frequency of the fan; Obtaining the fundamental frequency of the fan; Determining a harmonic spacing frequency band according to the fundamental frequency and the resonant frequency of the fan; Obtaining the frequency corresponding to the amplitude peak from the second amplitude-frequency curve to obtain the resonance frequency of the oil mist interception module; Determining whether the resonant frequency of the oil mist interception module is within the harmonic spacing frequency band; If yes, then there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve; If not, there is no overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve.

[0010] Optionally, the main peak frequency band of the fan within the preset time includes a first main peak frequency band, the main peak frequency band of the oil mist interception module within the preset time includes a second main peak frequency band, and adjusting the preset working power according to the preset power gain value includes: determining whether an overlapping region between the first main peak frequency band and the second main peak frequency band is located in a high frequency band region of the first main peak frequency band; If yes, increasing the preset working power according to the preset power gain value; If not, the preset working power is lowered according to the preset power gain value.

[0011] Optionally, the resonant frequency of the fan includes a first resonant frequency, the first resonant frequency is located in a target harmonic spacing frequency band, and determining the harmonic spacing frequency band according to the fundamental frequency and the resonant frequency of the fan includes: Calculating the product of the base frequency and a preset reference value to obtain a reference base frequency; Calculating the difference between the first resonant frequency and the reference fundamental frequency to obtain the starting frequency of the target harmonic spacing frequency band; Calculating the sum of the first resonant frequency and the reference fundamental frequency to obtain the end frequency of the target harmonic spacing frequency band; The target harmonic spacing frequency band is determined according to the start frequency and the end frequency of the target harmonic spacing frequency band.

[0012] Optionally, the resonant frequency of the oil mist interception module includes a second resonant frequency, the second resonant frequency is located in the target harmonic spacing frequency band, and the adjusting the preset working power according to the preset power gain value includes: determining whether the second resonance frequency is greater than the first resonance frequency; If yes, increasing the preset working power according to the preset power gain value; If not, the preset working power is lowered according to the preset power gain value.

[0013] In a second aspect, an embodiment of the present application further provides a range hood device, which includes a unit for executing the above method.

[0014] In a third aspect, an embodiment of the present application further provides a range hood device, which includes a memory and a processor, wherein a computer program is stored in the memory, and the above method is implemented when the processor executes the computer program.

[0015] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium, wherein the storage medium stores a computer program, and the computer program can implement the above method when executed by a processor.

[0016] The embodiment of the present application provides a range hood control method and a range hood device. The method includes: obtaining first vibration data of a fan within a preset time; fitting the first vibration data into a first amplitude-time curve; performing Fourier transform on the first amplitude-time curve to obtain a first amplitude-frequency curve of the fan within the preset time; obtaining second vibration data of an oil mist interception module within the preset time based on a preset working power; fitting the second vibration data into a second amplitude-time curve; performing Fourier transform on the second amplitude-time curve to obtain a second amplitude-frequency curve of the oil mist interception module within the preset time; determining whether there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve; if so, updating the preset working power according to a preset power gain value to reduce the size of the overlapping area. In the technical solution of the present application, the working power of the oil mist interception module is adjusted to reduce the overlapping area of ​​the amplitude-frequency curve of the fan and the amplitude-frequency curve of the oil mist interception module, so that the noise frequency of the fan is not close to the noise frequency of the oil mist interception module, thereby reducing the coherent influence of the noise of the fan and the noise of the oil mist interception module, effectively reducing the decibel value of the noise generated when the range hood is working, and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0019] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0020] Figure 1 One of the flow charts of a range hood control method provided in an embodiment of the present application; Figure 2 A second flow chart of a range hood control method provided in an embodiment of the present application; Figure 3 A third flow chart of a range hood control method provided in an embodiment of the present application; Figure 4 A fourth flow chart of a range hood control method provided in an embodiment of the present application; Figure 5 A fifth flow chart of a range hood control method provided in an embodiment of the present application; Figure 6 A schematic diagram of the structure of a range hood device provided in an embodiment of the present application Figure 1 ; Figure 7 This is a schematic diagram of the structure of a range hood device provided in an embodiment of the present application. Figure 2 ; Figure 8 is an exploded schematic diagram of a range hood device provided in an embodiment of the present application; Fig. 9 It is a structural schematic diagram of a fan in a range hood device provided in an embodiment of the present application; Fig.10 It is a structural schematic diagram of an oil mist interception module in a range hood device provided in an embodiment of the present application; Fig.11 It is a schematic diagram of an explosion of an oil mist interception module in a range hood device provided in an embodiment of the present application.

[0021] Figure 7-Figure 11 middle: 100-oil mist interception module, 101-interception motor, 102-mounting bracket, 103-mounting shaft, 104-oil mist interception disc, 105-locking nut, 2-fan, 3-fan vibration sensor, 4-oil mist interception module vibration sensor, 5-smoke collection chamber, 6-box, 7-air outlet, 8-oil cup. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0023] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0024] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0025] It should also be understood that the terms used in this application specification are only for the purpose of describing specific embodiments and are not intended to limit the application. As used in this application specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0026] It should be further understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0027] As used in this specification and the appended claims, the term "if" may be interpreted as "when" or "upon" or "in response to determining" or "in response to detecting," depending on the context. Similarly, the phrases "if it is determined" or "if [described condition or event] is detected" may be interpreted as meaning "upon determination" or "in response to determining" or "upon detection of [described condition or event]" or "in response to detecting [described condition or event]," depending on the context.

[0028] In order to solve the technical problem in the prior art that the noise decibel value of the range hood is significantly increased due to the interference of noise generated by the fan and the oil mist interception module, the present application provides a range hood control device that can solve the above technical problem.

[0029] See also Figure 1 , Figure 1 This is one of the flow charts of a range hood control method provided in an embodiment of the present application. In one embodiment, the method includes: S101, obtaining first vibration data of a fan within a preset time.

[0030] The fan of the range hood vibrates when it is working. The user collects the vibration data of the fan through the vibration sensor on the fan. The vibration data includes amplitude, which is the displacement generated when the fan vibrates. The fan vibrates periodically under normal working conditions. The preset time can be the duration including one or more vibration cycles of the fan. The first vibration data is the vibration data collected from the fan by the vibration sensor within the preset time.

[0031] S102 : Fit the first vibration data into a first amplitude-time curve.

[0032] The abscissa direction of the first amplitude-time curve is time, and the ordinate direction is amplitude.

[0033] S103 , performing Fourier transform on the first amplitude-time curve to obtain a first amplitude-frequency curve of the fan within a preset time.

[0034] The first amplitude-time curve is subjected to Fourier transformation to obtain a first amplitude-frequency curve, wherein the abscissa direction of the first amplitude-frequency curve is frequency, and the ordinate direction is amplitude.

[0035] S104, obtaining second vibration data of the oil mist interception module based on a preset working power within a preset time.

[0036] When the range hood leaves the factory, the gear position of each fan corresponds to the preset working power of the oil mist interception module. When the fan works at a fixed gear position, the oil mist interception module can meet the interception efficiency and the working conditions of the highest vibration amplitude frequency band of the fan and the oil mist interception module at the initial working power. The initial working power of the oil mist interception module is obtained by the applicant based on a large amount of experimental data. For example, when the gear position of the fan is 1st gear, the initial working power of the oil mist interception module is 20W.

[0037] The oil mist interception module will vibrate when working. Similarly, the user collects the vibration data of the oil mist interception module through the vibration sensor on the oil mist interception module. Among them, the vibration data includes amplitude, which is the displacement generated when the oil mist interception module vibrates. The second vibration data is the vibration data collected from the oil mist interception module by the vibration sensor within a preset time.

[0038] S105 , fitting the second vibration data into a second amplitude-time curve.

[0039] The horizontal axis direction of the second amplitude-time curve is time, and the vertical axis direction is amplitude.

[0040] S106. Perform Fourier transform on the second vibration amplitude-time curve to obtain a second amplitude-frequency curve of the oil mist interception module within a preset time.

[0041] The second amplitude-time curve is subjected to Fourier transformation to obtain a second amplitude-frequency curve, wherein the abscissa direction of the second amplitude-frequency curve is frequency, and the ordinate direction is amplitude.

[0042] It should be noted that the present application may also execute S101-S103 first and then execute S104-S106; or, execute S101-S103 and S104-S106 simultaneously depending on the circumstances.

[0043] It should be noted that as long as the vibration frequencies of the fan and the oil mist interception module are collected within the same time, S104-S106 may be executed first and then S101-S103.

[0044] S107 , determining whether there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve.

[0045] If the first amplitude-frequency curve overlaps with the second amplitude-frequency curve, it indicates that the vibration frequency of the fan is coherent with the vibration frequency of the oil mist interception module. How to determine whether there is an overlapping area will be described in detail in the following embodiments. This application will not go into details.

[0046] S108: If yes, adjust the preset working power according to the preset power gain value to reduce the overlapping area.

[0047] Different oil mist interception modules may correspond to different preset power gain values. Optionally, the preset power gain value may be 2.5W or 3W.

[0048] The fan will generate heat when it is working, which will affect the working frequency of the fan, and thus cause the oil mist interception module to fail to meet the condition that the highest vibration amplitude frequency band of the fan and the oil mist interception module are staggered under the preset working power. Therefore, it is necessary to adjust the preset working power of the oil mist interception module so that the oil mist interception module works under the new preset working power to reduce the overlapping area.

[0049] How to adjust the preset working power according to the preset power gain value will be described in detail in the following embodiments, and this application will not elaborate on this.

[0050] It should be noted that after adjusting the preset working power of the fan, S101-S108 are repeatedly performed so that there is no overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve. At this time, the noise of the fan is not related to the noise of the oil mist interception module, which effectively reduces the decibel value of the noise generated when the range hood is working, and improves the user experience.

[0051] The embodiment of the present application provides a range hood control method. The method includes: obtaining first vibration data of a fan within a preset time; fitting the first vibration data into a first amplitude-time curve; performing Fourier transform on the first amplitude-time curve to obtain a first amplitude-frequency curve of the fan within the preset time; obtaining second vibration data of an oil mist interception module within the preset time based on a preset working power; fitting the second vibration data into a second amplitude-time curve; performing Fourier transform on the second amplitude-time curve to obtain a second amplitude-frequency curve of the oil mist interception module within the preset time; determining whether there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve; if so, updating the preset working power according to a preset power gain value to reduce the size of the overlapping area. In the technical solution of the present application, the working power of the oil mist interception module is adjusted to reduce the overlapping area of ​​the amplitude-frequency curve of the fan and the amplitude-frequency curve of the oil mist interception module, so that the noise frequency of the fan is not close to the noise frequency of the oil mist interception module, thereby reducing the coherent influence of the noise of the fan and the noise of the oil mist interception module, effectively reducing the decibel value of the noise generated when the range hood is working, and improving the user experience.

[0052] See also Figure 2 , Figure 2The second flow chart of a range hood control method provided in an embodiment of the present application. In one embodiment, the step of determining whether the first amplitude-frequency curve and the second amplitude-frequency curve have an overlapping area includes: S201 . Determine a main peak frequency band of a wind turbine within a preset time according to an amplitude peak value in a first amplitude-frequency curve and a preset amplitude threshold.

[0053] In one embodiment, determining the main peak frequency band of the fan within the preset time according to the amplitude peak value in the first amplitude-frequency curve and a preset amplitude threshold comprises: Step A: Calculate the product of the amplitude peak value in the first amplitude-frequency curve and the preset amplitude threshold to obtain the first amplitude.

[0054] Preferably, the preset amplitude threshold is 95%, but it may also be other percentage values ​​less than 1.

[0055] For example, the amplitude peak value in the first amplitude-frequency curve is 20, and the preset amplitude threshold is 95%, then the first amplitude is 20*95%=19.

[0056] Step B: determining the starting frequency and ending frequency of the main peak frequency band of the fan within a preset time according to the frequency corresponding to the first amplitude; For example, in the first amplitude-frequency curve, first determine the position of the amplitude peak 20, which is recorded as the first peak position. Next, in the first amplitude-frequency curve, with the first peak position as the search center, search in the direction of decreasing frequency for the position with an amplitude value of 19 that is closest to the first peak position. The frequency value corresponding to this position is the starting frequency of the main peak frequency band of the fan within the preset time. Finally, in the first amplitude-frequency curve, with the first peak position as the search center, search in the direction of increasing frequency for the position with an amplitude value of 19 that is closest to the first peak position. The frequency value corresponding to this position is the ending frequency of the main peak frequency band of the fan within the preset time.

[0057] Step C: determining the main peak frequency band of the fan within the preset time according to the starting frequency and the ending frequency of the main peak frequency band of the fan within the preset time.

[0058] The main peak frequency band of the fan within the preset time is determined according to the starting frequency and the ending frequency of the main peak frequency band of the fan within the preset time.

[0059] S202, determining a main peak frequency band of the oil mist interception module within a preset time according to an amplitude peak value in a second amplitude-frequency curve and a preset amplitude threshold.

[0060] In one embodiment, determining the main peak frequency band of the oil mist interception module within the preset time according to the amplitude peak value in the second amplitude-frequency curve and the preset amplitude threshold comprises: Step a: Calculate the product of the amplitude peak value in the second amplitude-frequency curve and the preset amplitude threshold to obtain the second amplitude; It should be noted that the calculation method of the first amplitude in step a is the same as that in step A. This application will not go into details here.

[0061] Step b: determining the starting frequency and ending frequency of the main peak frequency band of the oil mist interception module within a preset time according to the frequency corresponding to the second amplitude; It should be noted that the calculation method of the starting frequency and the ending frequency of the main peak frequency band of the fan within the preset time in step b is the same as that in step B, and this application will not repeat them here.

[0062] Step c: determining the main peak frequency band of the oil mist interception module within the preset time according to the starting frequency and the ending frequency of the main peak frequency band within the preset time.

[0063] The main peak frequency band of the oil mist interception module within the preset time is determined according to the starting frequency and the ending frequency of the main peak frequency band within the preset time.

[0064] S203, determining whether there is an overlapping area between the main peak frequency band of the fan within a preset time and the main peak frequency band of the oil mist interception module within a preset time.

[0065] It should be noted that if two noise signals are coherent in the high frequency band, the decibel value of the noise after the two signals are superimposed will reach the maximum. Therefore, the decibel value of the noise after superposition can be effectively reduced by controlling the size of the overlapping area of ​​the frequency of the fan noise and the frequency of the oil mist interception module noise in the main peak frequency band.

[0066] See also Figure 3 , Figure 3 The third flow chart of a range hood control method provided in an embodiment of the present application. In one embodiment, the step of determining whether the first amplitude-frequency curve and the second amplitude-frequency curve have an overlapping area includes: S301. Obtain a frequency corresponding to an amplitude peak from a first amplitude-frequency curve to obtain a resonant frequency of the fan.

[0067] The resonant frequency of the fan is the frequency corresponding to the peak amplitude of the fan in the first amplitude-frequency curve.

[0068] S302: Obtain the fundamental frequency of the fan.

[0069] The fundamental frequency of the fan is the actual frequency of the rotating magnetic field when the fan is running. Under rated conditions, the fundamental frequency is equal to the rated frequency.

[0070] S303. Determine the harmonic spacing frequency band according to the fundamental frequency and the resonant frequency of the fan.

[0071] In one embodiment, the resonant frequency of the wind turbine includes a first resonant frequency, the first resonant frequency is located in a target harmonic spacing frequency band, and determining the harmonic spacing frequency band according to the fundamental frequency and the resonant frequency of the wind turbine includes: S3031. Calculate the product of the base frequency and a preset reference value to obtain a reference base frequency.

[0072] Preferably, the preset reference value is 3. For example, if the base frequency is 20 Hz, the reference base frequency is 20*3=60 Hz.

[0073] S3032. Calculate the difference between the first resonant frequency and the reference fundamental frequency to obtain the starting frequency of the target harmonic spacing frequency band.

[0074] For example, if the first resonance frequency is 300 Hz and the reference fundamental frequency is 60 Hz, the starting frequency of the target harmonic spacing frequency band is 300-60=240 Hz.

[0075] S3033. Calculate the sum of the first resonance frequency and the reference fundamental frequency to obtain the end frequency of the target harmonic spacing frequency band.

[0076] For example, if the first resonance frequency is 300 Hz and the reference fundamental frequency is 60 Hz, the end frequency of the target harmonic spacing frequency band is 300+60=360 Hz.

[0077] S3034. Determine the target harmonic spacing frequency band according to the start frequency and the end frequency of the target harmonic spacing frequency band.

[0078] From the above example, we can see that the target harmonic spacing frequency band is [240, 360].

[0079] S304 , obtaining the frequency corresponding to the amplitude peak from the second amplitude-frequency curve to obtain the resonance frequency of the oil mist interception module.

[0080] S305: Determine whether the resonance frequency of the oil mist interception module is within the harmonic spacing frequency band.

[0081] S306: If yes, then there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve.

[0082] S307: If not, there is no overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve.

[0083] It should be noted that S304-S307 are explained below.

[0084] For example, when the target harmonic spacing frequency band is [240, 360], and the resonant frequency of the oil mist interception module is 200 Hz, the resonant frequency 200 Hz of the oil mist interception module is not located in the target harmonic spacing frequency band [240, 360]. Therefore, there is no overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve. When the resonant frequency of the oil mist interception module is 270 Hz, the resonant frequency 270 Hz of the oil mist interception module is located in the target harmonic spacing frequency band [240, 360]. Therefore, there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve.

[0085] See also Figure 4 , Figure 4 A fourth flow chart of a range hood control method provided in an embodiment of the present application. In one embodiment, the main peak frequency band of the fan within the preset time includes a first main peak frequency band, the main peak frequency band of the oil mist interception module within the preset time includes a second main peak frequency band, and the adjusting the preset working power according to the preset power gain value includes: S401: Determine whether an overlapping region between a first main peak frequency band and a second main peak frequency band is located in a high frequency region of the first main peak frequency band.

[0086] S402: If yes, increase the preset working power according to the preset power gain value.

[0087] S403: If not, lower the preset working power according to the preset power gain value.

[0088] It should be noted that S401-S403 are explained below.

[0089] For example, if the first main peak frequency band is [100-200] and the second main peak frequency band is [150-300], then the overlapping area between the first main peak frequency band and the second main peak frequency band is [150-200]. It can be seen that the overlapping area [150-200] is located in the high frequency band area of ​​the first main peak frequency band, and the preset working power is increased according to the preset power gain value. For another example, if the first main peak frequency band is [100-200] and the second main peak frequency band is [90-120], then the overlapping area between the first main peak frequency band and the second main peak frequency band is [100-120]. It can be seen that the overlapping area [100-120] is located in the low frequency band area of ​​the first main peak frequency band, and the preset working power is lowered according to the preset power gain value.

[0090] See also Figure 5 , Figure 5 A fifth flow chart of a range hood control method provided in an embodiment of the present application. The resonant frequency of the oil mist interception module includes a second resonant frequency, the second resonant frequency is located in the target harmonic spacing frequency band, and the preset working power is adjusted according to the preset power gain value, including: S501: Determine whether the second resonance frequency is greater than the first resonance frequency.

[0091] S502: If yes, increase the preset working power according to the preset power gain value.

[0092] S503: If not, lower the preset working power according to the preset power gain value.

[0093] It should be noted that S501-S503 are explained below.

[0094] For example, the target harmonic spacing frequency band is [100-200], the first resonant frequency is 150Hz, and the second resonant frequency is 120Hz. Since the second resonant frequency is less than the first resonant frequency, the preset working power is lowered according to the preset power gain value. For example, the adjusted preset working power is equal to the preset working power minus the preset power gain value. For another example, the target harmonic spacing frequency band is [100-200], the first resonant frequency is 150Hz, and the second resonant frequency is 180Hz. Since the second resonant frequency is greater than the first resonant frequency, the preset working power is increased according to the preset power gain value. For example, the adjusted preset working power is equal to the preset working power plus the preset power gain value.

[0095] It should be noted that if the user adjusts the fan gear or the operating conditions such as flow channel resistance and back pressure change, the range hood will repeatedly execute the range hood control method in any of the above embodiments to reduce the overlapping area of ​​the amplitude-frequency curve of the fan and the amplitude-frequency curve of the oil mist interception module, so that the noise frequency of the fan is not close to the noise frequency of the oil mist interception module, thereby reducing the coherent influence of the noise of the fan and the noise of the oil mist interception module, effectively reducing the decibel value of the noise generated when the range hood is working, and improving the user experience.

[0096] like Figure 6 As shown, the embodiment of the present application provides a range hood device, including a processor 61, a communication interface 62, a memory 63 and a communication bus 64, wherein the processor 61, the communication interface 62, and the memory 63 communicate with each other through the communication bus 64. Memory 63, used for storing computer programs; In one embodiment of the present application, the processor 61 is used to implement a range hood control method provided by any one of the aforementioned method embodiments when executing a program stored in the memory 63 .

[0097] See also Figures 7 to 9 In one embodiment, the range hood device comprises: The fan 2, the smoke collecting chamber 5, the box 6, the air outlet 7 and the oil cup 8, the range hood device also includes: an oil mist interception module 100; like Figure 10 to Figure 11 As shown, the oil mist interception module 100 is composed of an interception motor 101, a mounting bracket 102, a mounting shaft 103, an oil mist interception disc 104 and a locking nut 105. The boss below the mounting shaft 103 passes through the center hole of the oil mist interception disc 104, so that the cone of the mounting shaft 103 fits the interception disc, and the respective rivet holes are aligned and connected by rivets. The interception motor 101 is screwed to the platform connected by the reinforcing ribs above the guide ring of the mounting bracket 102. The oil mist interception disc 104 and the mounting shaft 103 are connected coaxially from the bottom of the mounting bracket 102, and the center axis hole of the mounting shaft 103 passes from the axis on the interception motor 101 to the motor limit. Finally, the locking nut 105 is screwed on the end of the shaft of the interception motor 101 to lock it, forming the oil mist interception module 100.

[0098] The oil mist interception module 100 is placed at an angle so that the air guide ring of the oil mist interception module 100 faces the smoke inlet of the smoke collecting chamber 5. The oil mist interception module 100 is fixed at an angle between the box body 6 and the smoke collecting chamber 5 by screws, so that one side of the oil mist interception module 100 faces the box body 6, and the other side faces the smoke inlet of the smoke collecting chamber 5.

[0099] Specifically, the upper end of the smoke collecting chamber 5 is fixedly connected to the lower end of the box body 6 to serve as the main structure of the range hood and to support and connect other components. The smoke collecting chamber 5 and the inside of the box body 6 are the main channels for smoke flow. The fan 2 is placed in the box body 6, and its top outlet and the lower end of the air outlet 7 are fixedly installed facing the smoke exhaust port above the box body 6, thereby forming a channel for smoke exhaust. The oil cup 8 is detachably placed and inserted into the pin structure at the bottom of the smoke collecting chamber 5, and is used to collect oil that is intercepted by the range hood and flows down from the oil leak. The oil mist interception module 100 is fixed between the box body 6 and the smoke collecting chamber 5 by means of a folded edge on the side. It is placed at an angle and can adapt to different fan models, which is conducive to the oil flowing to the back of the range hood along the inclined mounting bracket 102 under the action of gravity. The larger diameter of the guide ring of the mounting bracket 102 faces the smoke inlet of the smoke collecting chamber 5 on one side and faces the direction of the fan 2 on the other side, so that most of the oil smoke particles entering the fan 2 need to pass through the oil mist interception module 100 first, thereby protecting the rear fan and reducing the impact of the oil smoke particles on the fan performance.

[0100] like Figure 8 As shown, a fan vibration sensor 3 is installed on the outer surface of the fan 2 to collect vibration data generated when the fan is working. When the range hood is working, the fan vibration sensor 3 will collect the displacement of the measurement point within the fan time t in real time, and transmit it to the main controller for analysis. Preferably, the sampling frequency of the fan vibration sensor 3 and the oil mist interception module vibration sensor 4 is at least twice the highest frequency of the vibration signal.

[0101] like Fig.11 As shown, during assembly, the interception motor 101 is placed downward from the top of the mounting bracket 102, so that the shaft on the interception motor 101 passes through the mounting bracket from top to bottom, and the screw holes arranged around the interception motor 101 are fixed to the screw holes on the platform connected by the reinforcing ribs above the mounting bracket 102. The oil mist interception disc 104 and the mounting shaft 103 are aligned and fixed with rivets. During operation, the two have the same rotation speed and no relative movement, and the shaft hole passes through the shaft on the interception motor 101 from the bottom of the mounting bracket 102 and is fixed axially. Finally, the locking nut 105 is screwed on the tail end of the shaft on the interception motor 101 to lock it to form the oil mist interception module 100, ensuring that the shaft output of the interception motor 101 is synchronized with the oil mist interception disc 104.

[0102] Preferably, the oil mist interception disk 104 has a plurality of densely packed spokes extending from the inner ring to the outer ring, and the spokes are smooth curves protruding in the rotation direction of the oil mist interception disk 104. This design not only facilitates the intercepted oil fume particles to be directed to the outer edge of the oil mist interception disk 104 and thrown out, but also reduces the rotational resistance to a certain extent. When the range hood is working, the high-speed rotating oil mist interception disk 104 cuts the oil fume particles to intercept the oil fume particles. The interception motor 101 can control the oil mist interception disk 104 independently. Preferably, the optimal oil mist interception speed is matched according to the concentration of the oil fume particles, the fan gear position and the vibration data. The best comprehensive performance is achieved in the interception efficiency of the oil fume particles, the overall machine noise and the air performance loss.

[0103] Preferably, the mounting bracket 102 is provided with folded edges all around and is provided with screw holes for being screwed to the housing 6 and fixed between the smoke collecting chamber 5 and the housing 6. The oil mist interception module 100 is tilted in a manner that it is higher in the front and lower in the back in the range hood. On the one hand, it can enable the guide ring of the mounting bracket 102 to be more directly opposite the smoke inlet of the range hood, so that the path of the smoke entering the housing 6 through the guide ring is smoother, and the flow resistance is effectively reduced. On the other hand, after some of the oil smoke particles intercepted by the oil mist interception plate 104 are thrown onto the mounting bracket 102, the oil smoke particles flow to the rear end of the range hood along with the tilted mounting bracket 102 under the action of gravity, and then drip down, and finally converge into the oil cup 8. In addition, the tilted mounting bracket 102 can increase the diameter of the guide ring through which the smoke passes relative to the horizontal placement, thereby increasing the air intake area and reducing the air performance loss.

[0104] The working principle of the range hood device in the embodiment of the present application is as follows: the user selects a suitable gear to start the fan 2 according to the concentration of the oil fume particles. The interception motor 101 outputs a power w corresponding to the gear of the fan 2. Under the suction of the fan 2, the oil fume particles outside the range hood enter the smoke collecting chamber 5 from the smoke inlet. First, the static filter intercepts a small part of the oil fume particles. Secondly, the oil mist interception module 100 cuts the oil fume particles through the high-speed rotating oil mist interception disk 104, so that most of the oil fume particles are intercepted, thereby preventing a large number of oil fume particles from entering the fan 2, reducing the degree of contamination of the impeller and volute of the fan 2 by the oil fume particles, and is conducive to maintaining the cleanliness of the rear end fan 2 and the output performance of the fan. Finally, the intercepted oil fume particles are sucked into the fan 2 through the guidance of the guide ring and the blocking of the box 6 and discharged to the outside from the air outlet 7. The oil smoke particles intercepted by the oil mist interception disk 104 rotate at high speed along the spokes on the oil mist interception disk 104 to the outer edge of the interception disk and are thrown onto the guide ring. Under the guidance of the mounting bracket 102, they flow to the rear of the range hood, and then drip into the smoke collecting chamber 5 under the action of gravity, and finally converge into the oil cup 8. During this period, first, the fan vibration sensor 3 and the oil mist interception module vibration sensor 4 collect the displacement data of the fan 2 and the oil mist interception module 100 within time t, where the displacement data is vibration data. The range hood transmits the vibration data back to the main controller of the range hood to process the vibration data. Next, the range hood converts the two sets of vibration data into frequency domain data, and determines whether the amplitude-frequency curves corresponding to the frequency domain data of the two have main peak overlap. If not, the procedure is repeated to collect the vibration data of the fan 2 and the oil mist interception module 100. If yes, the operating power of the interception motor 101 is adjusted to reduce the main peak overlap area of ​​the amplitude-frequency curve of the fan 2 and the oil mist interception module 100. The range hood repeatedly collects the vibration data of the fan 2 and the oil mist interception module 100 to analyze and adjust the power of the interception motor 101 until there is no main peak overlap area of ​​the amplitude-frequency curve of the fan 2 and the oil mist interception module 100. This control method is repeated periodically during the startup of the range hood until the user turns it off.

[0105] It is understood by those skilled in the art that all or part of the processes in the method for implementing the above embodiment can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a storage medium, which is a computer-readable storage medium. The computer program is executed by at least one processor in the computer system to implement the process steps of the embodiment of the above method.

[0106] Therefore, an embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the range hood control method provided in any of the aforementioned method embodiments are implemented.

[0107] The storage medium is a physical, non-transient storage medium, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk, etc., which can store program codes. The computer-readable storage medium can be non-volatile or volatile.

[0108] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0109] In the several embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of each unit is only a logical function division, and there may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.

[0110] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs. The units in the device of the embodiment of the present application can be combined, divided and deleted according to actual needs. In addition, the functional units in the various embodiments of the present application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0111] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, terminal, or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application.

[0112] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0113] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

[0114] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A range hood control method, characterized in that: The method comprises: Acquire the first vibration data of the fan within a preset time; fitting the first vibration data into a first amplitude-time curve; Performing Fourier transformation on the first amplitude-time curve to obtain a first amplitude-frequency curve of the fan within the preset time; Acquire second vibration data of the oil mist interception module within the preset time at the preset working power; fitting the second vibration data into a second amplitude-time curve; Performing Fourier transformation on the second amplitude-time curve to obtain a second amplitude-frequency curve of the oil mist interception module within the preset time; Determine whether there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve; If so, the preset working power is adjusted according to the preset power gain value so that the overlapping area is reduced.

2. The method according to claim 1, characterized in that: The determining whether the first amplitude-frequency curve and the second amplitude-frequency curve have an overlapping area includes: Determine the main peak frequency band of the fan within the preset time according to the amplitude peak value in the first amplitude-frequency curve and the preset amplitude threshold; Determine the main peak frequency band of the oil mist interception module within the preset time according to the amplitude peak value in the second amplitude-frequency curve and the preset amplitude threshold; It is determined whether there is an overlapping area between the main peak frequency band of the fan within the preset time and the main peak frequency band of the oil mist interception module within the preset time.

3. The method according to claim 2, characterized in that: The determining of the main peak frequency band of the fan within the preset time according to the amplitude peak value in the first amplitude-frequency curve and the preset amplitude threshold comprises: Calculating the product of the amplitude peak value in the first amplitude-frequency curve and the preset amplitude threshold to obtain a first amplitude; Determine the starting frequency and ending frequency of the main peak frequency band of the fan within the preset time according to the frequency corresponding to the first amplitude; Determine the main peak frequency band of the fan within the preset time according to the starting frequency and the ending frequency of the main peak frequency band of the fan within the preset time; The determining of the main peak frequency band of the oil mist interception module within the preset time according to the amplitude peak value in the second amplitude-frequency curve and the preset amplitude threshold comprises: Calculate the product of the amplitude peak value in the second amplitude-frequency curve and the preset amplitude threshold to obtain a second amplitude; Determine the starting frequency and ending frequency of the main peak frequency band of the oil mist interception module within the preset time according to the frequency corresponding to the second amplitude; The main peak frequency band of the oil mist interception module within the preset time is determined according to the starting frequency and the ending frequency of the main peak frequency band within the preset time.

4. The method according to claim 1, characterized in that: The determining whether the first amplitude-frequency curve and the second amplitude-frequency curve have an overlapping area includes: Obtaining the frequency corresponding to the amplitude peak from the first amplitude-frequency curve to obtain the resonant frequency of the fan; Obtaining the fundamental frequency of the fan; Determining a harmonic spacing frequency band according to the fundamental frequency and the resonant frequency of the fan; Obtaining the frequency corresponding to the amplitude peak from the second amplitude-frequency curve to obtain the resonance frequency of the oil mist interception module; Determining whether the resonant frequency of the oil mist interception module is within the harmonic spacing frequency band; If yes, then there is an overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve; If not, there is no overlapping area between the first amplitude-frequency curve and the second amplitude-frequency curve.

5. The method according to claim 2 or 3, characterized in that: The main peak frequency band of the fan within the preset time includes a first main peak frequency band, the main peak frequency band of the oil mist interception module within the preset time includes a second main peak frequency band, and the adjusting the preset working power according to the preset power gain value includes: determining whether an overlapping region between the first main peak frequency band and the second main peak frequency band is located in a high frequency band region of the first main peak frequency band; If yes, increasing the preset working power according to the preset power gain value; If not, the preset working power is lowered according to the preset power gain value.

6. The method according to claim 4, characterized in that: The resonant frequency of the wind turbine includes a first resonant frequency, and the first resonant frequency is located in a target harmonic spacing frequency band. The step of determining the harmonic spacing frequency band according to the fundamental frequency and the resonant frequency of the wind turbine includes: Calculating the product of the base frequency and a preset reference value to obtain a reference base frequency; Calculating the difference between the first resonant frequency and the reference fundamental frequency to obtain the starting frequency of the target harmonic spacing frequency band; Calculating the sum of the first resonant frequency and the reference fundamental frequency to obtain the end frequency of the target harmonic spacing frequency band; The target harmonic spacing frequency band is determined according to the start frequency and the end frequency of the target harmonic spacing frequency band.

7. The method according to claim 6, characterized in that: The resonant frequency of the oil mist interception module includes a second resonant frequency, and the second resonant frequency is located in the target harmonic spacing frequency band. The adjusting the preset working power according to the preset power gain value includes: determining whether the second resonance frequency is greater than the first resonance frequency; If yes, increasing the preset working power according to the preset power gain value; If not, the preset working power is lowered according to the preset power gain value.

8. A range hood device, characterized in that: The range hood device comprises a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the method according to any one of claims 1 to 7 is implemented.

9. The range hood device according to claim 8, comprising: A fan (2), a smoke collecting chamber (5), a box body (6), an air outlet (7) and an oil cup (8), wherein the range hood device further comprises: an oil mist intercepting module (100); The oil mist interception module (100) is placed at an angle so that the air guide ring of the oil mist interception module (100) faces the smoke inlet of the smoke collecting chamber (5); the oil mist interception module (100) is fixed at an angle between the box body (6) and the smoke collecting chamber (5) by means of screws so that one side of the oil mist interception module (100) faces the box body (6) and the other side faces the smoke inlet of the smoke collecting chamber (5); the fan (2) is located in the box body (6), and the fan (2) is located above the oil mist interception module (100).

10. The range hood device according to claim 9, characterized in that: The range hood device further comprises: a fan vibration sensor (3) and an oil mist interception module vibration sensor (4); The fan vibration sensor (3) is arranged on the outer surface of the fan (2) and is used to collect vibration data generated when the fan (2) is working; The oil mist interception module vibration sensor (4) is arranged on the oil mist interception module (100) and is used to collect vibration data generated when the oil mist interception module (100) is working.

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