Abnormal sound adjusting method and device of range hood and range hood

Abstract

The invention provides an abnormal sound adjusting method and device of a range hood and the range hood. The method comprises the steps that after the range hood stably operates, the air duct vibration frequency and the motor vibration frequency of the range hood are obtained; taking a difference value between the motor vibration frequency and the air duct vibration frequency as a frequency vibration frequency difference value, and determining whether the air duct vibration frequency and the motor vibration frequency are the same based on the frequency vibration frequency difference value; if the air duct vibration frequency is the same as the motor vibration frequency, the air duct vibration frequency is adjusted through an electromagnet; wherein the electromagnet is used for adjusting the stress mode of the air duct; and / or the position of the electric push rod is adjusted, and the air duct vibration frequency is determined based on the adjusted position of the electric push rod; the electric push rod is connected with a fixing base at the bottom of the air duct through an elastic piece. In the mode, the stress mode of the air duct can be changed through the electromagnet, the vibration frequency of the air duct is adjusted, and the vibration frequency of the motor is not adjusted, so that the problem of resonance abnormal sound is completely eliminated, and the user experience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of range hoods, and in particular to a method and device for adjusting abnormal noise of a range hood and a range hood. Background Art

[0002] The sound quality of the range hood when it is working will vary to a certain extent. Sometimes there will be so-called "buzzing", "rumbling", "whistling" and "sizzling" sounds, which are collectively called abnormal noise or sound of the range hood. Abnormal noise will seriously affect the product quality of the range hood and make people feel uncomfortable after hearing it, so the control of abnormal noise of the range hood is currently receiving more and more attention.

[0003] At present, the main source of abnormal noise in range hoods is the resonance of the motor and the air duct (the difference in vibration frequency between the motor and the air duct is within a certain range), which produces low-frequency noises such as "buzzing" and "sizzling". The common solution is to hang components under the air duct to adjust the gravity mode of the air duct, or adjust the motor speed to change its vibration frequency. However, the general structure of the gravity mode cannot be adjusted according to the use environment and cannot completely eliminate the resonance noise; the adjustment of the motor speed will affect the change of the air volume, resulting in the inability to completely eliminate the resonance noise, and its adjustable range is limited.

[0004] Therefore, the existing noise adjustment scheme for range hoods cannot completely eliminate the resonance noise, and the user experience is poor. Summary of the invention

[0005] In view of this, the object of the present invention is to provide a method, device and range hood for adjusting the abnormal sound of a range hood, so as to change the force mode of the air duct through an electromagnet, adjust the vibration frequency of the air duct without adjusting the vibration frequency of the motor, thereby completely eliminating the problem of resonance abnormal sound and improving the user experience.

[0006] In the first aspect, an embodiment of the present invention provides a method for adjusting abnormal noise of a range hood, the method comprising: after the range hood is running stably, obtaining the air duct vibration frequency and the motor vibration frequency of the range hood; taking the difference between the motor vibration frequency and the air duct vibration frequency as the frequency-frequency difference, and determining whether the air duct vibration frequency and the motor vibration frequency are of the same frequency based on the frequency-frequency difference; if the air duct vibration frequency and the motor vibration frequency are of the same frequency, adjusting the air duct vibration frequency by an electromagnet; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, adjusting the position of the electric push rod, and determining the air duct vibration frequency based on the adjusted position of the electric push rod; wherein the electric push rod is connected to a fixing seat at the bottom of the air duct through an elastic member.

[0007] In an optional embodiment of the present application, the above-mentioned steps of obtaining the air duct vibration frequency and motor vibration frequency of the range hood include: obtaining the air duct vibration frequency of the range hood through a vibration frequency sensor set in the air duct of the range hood; obtaining the motor vibration frequency of the range hood through a vibration frequency sensor set in the motor of the range hood.

[0008] In an optional embodiment of the present application, the above-mentioned step of determining whether the air duct vibration frequency and the motor vibration frequency are the same frequency based on the frequency vibration difference includes: obtaining the operating gear of the range hood, and determining the limit frequency difference corresponding to the operating gear; if the frequency vibration difference is less than the limit frequency difference, it is determined that the air duct vibration frequency and the motor vibration frequency are the same frequency; if the frequency vibration difference is greater than or equal to the limit frequency difference, it is determined that the air duct vibration frequency and the motor vibration frequency are not the same frequency.

[0009] In an optional embodiment of the present application, the step of adjusting the vibration frequency of the air duct by means of an electromagnet includes: adjusting the current of the electromagnet disposed in the air duct, and determining the vibration frequency of the air duct based on the adjusted current of the electromagnet.

[0010] In an optional embodiment of the present application, the above-mentioned step of adjusting the current of the electromagnet arranged in the air duct includes: if the magnetic force value of the electromagnet and the influence of the electromagnet on the vibration frequency of the air duct are in a first mapping relationship that is approximately linearly positively correlated, and the change in the vibration frequency of the air duct is equal to 2 times the limit frequency difference, the current of the electromagnet is determined by the following formula: I = (1.5x-m+n)i / 2; wherein I is the current of the electromagnet, x is the limit frequency difference, m is the motor vibration frequency, and n is the air duct vibration frequency.

[0011] In an optional embodiment of the present application, the above method also includes: if the error between the actual value and the theoretical value of the motor vibration frequency is within a preset range, determining that the magnetic force value of the magnet and the influence of the electromagnet on the vibration frequency of the air duct are in a first mapping relationship.

[0012] In an optional embodiment of the present application, after the above-mentioned step of determining whether the duct vibration frequency and the motor vibration frequency are the same frequency based on the frequency vibration difference, the method also includes: if the magnetic value of the electromagnet and the influence of the electromagnet on the duct vibration frequency are not a first mapping relationship, adjusting the duct vibration frequency, and re-determining whether the duct vibration frequency and the motor vibration frequency are the same frequency; if the duct vibration frequency and the motor vibration frequency are the same frequency, adjusting the motor vibration frequency at least once, and re-determining whether the duct vibration frequency and the motor vibration frequency are the same frequency; if the duct vibration frequency and the motor vibration frequency are the same frequency, re-adjusting the duct vibration frequency until the duct vibration frequency reaches a preset maximum gear.

[0013] In an optional embodiment of the present application, the above-mentioned step of adjusting the motor vibration frequency at least once and re-determining whether the air duct vibration frequency and the motor vibration frequency are the same frequency includes: adjusting the motor vibration frequency and re-determining whether the air duct vibration frequency and the motor vibration frequency are the same frequency; if the air duct vibration frequency and the motor vibration frequency are the same frequency, re-adjusting the motor vibration frequency until the motor vibration frequency reaches a preset maximum gear.

[0014] In a second aspect, an embodiment of the present invention further provides an abnormal sound adjustment device for a range hood, the device comprising: a vibration frequency determination module, for obtaining the air duct vibration frequency and motor vibration frequency of the range hood after the range hood is running stably; a same frequency resonance judgment module, for taking the difference between the motor vibration frequency and the air duct vibration frequency as the frequency-frequency difference, and determining whether the air duct vibration frequency and the motor vibration frequency are of the same frequency based on the frequency-frequency difference; a vibration frequency adjustment module, for adjusting the air duct vibration frequency through an electromagnet if the air duct vibration frequency and the motor vibration frequency are of the same frequency; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, adjust the position of the electric push rod, and determine the air duct vibration frequency based on the adjusted position of the electric push rod; wherein the electric push rod is connected to a fixing seat at the bottom of the air duct through an elastic member.

[0015] In a third aspect, an embodiment of the present invention further provides a range hood, which is used to execute the above-mentioned method for adjusting abnormal sound of the range hood.

[0016] The embodiments of the present invention bring the following beneficial effects:

[0017] The embodiment of the present invention provides a method, device and range hood for adjusting abnormal noise of a range hood. After the range hood is running stably, the air duct vibration frequency and motor vibration frequency of the range hood are obtained; the difference between the motor vibration frequency and the air duct vibration frequency is used as the frequency-frequency difference, and whether the air duct vibration frequency and the motor vibration frequency are of the same frequency is determined based on the frequency-frequency difference; if the air duct vibration frequency and the motor vibration frequency are of the same frequency, the air duct vibration frequency is adjusted by an electromagnet; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, the position of the electric push rod is adjusted, and the air duct vibration frequency is determined based on the adjusted position of the electric push rod; wherein the electric push rod is connected to the fixing seat at the bottom of the air duct through an elastic member. In this method, the force mode of the air duct can be changed by the electromagnet, and the air duct vibration frequency can be adjusted without adjusting the motor vibration frequency, thereby completely eliminating the problem of resonance abnormal noise and improving the user experience.

[0018] Other features and advantages of the present disclosure will be set forth in the following description, or some features and advantages may be inferred or unambiguously determined from the description, or may be learned by implementing the above-mentioned technology of the present disclosure.

[0019] In order to make the above-mentioned objectives, features and advantages of the present disclosure more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A flow chart of a method for adjusting abnormal noise of a range hood provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of a module of a range hood provided by an embodiment of the present invention;

[0023] Figure 3 A flow chart of another method for adjusting abnormal noise of a range hood provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of a method for adjusting abnormal noise of a range hood provided by an embodiment of the present invention;

[0025] Figure 5 A schematic diagram of another method for adjusting abnormal noise of a range hood provided by an embodiment of the present invention;

[0026] Figure 6 A schematic diagram of a method for eliminating abnormal noise from a range hood provided by an embodiment of the present invention;

[0027] Figure 7 A schematic diagram of another method for eliminating abnormal noise from a range hood provided by an embodiment of the present invention;

[0028] Figure 8 A schematic structural diagram of a noise adjustment device for a range hood provided by an embodiment of the present invention;

[0029] Fig. 9 A schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] At present, the sound quality produced by the range hood in working state varies to a certain extent, and sometimes there will be so-called "buzzing", "rumbling", "whistling" and "sizzling", which are collectively called abnormal noise or sound of the range hood. Abnormal noise will seriously affect the product quality of the range hood and make people feel uncomfortable after hearing it, so the control of abnormal noise of the range hood is currently receiving more and more attention.

[0032] The main source of abnormal noise in range hoods is the resonance of the motor and the air duct at the same frequency, which produces low-frequency noises such as "buzzing" and "sizzling". The common solution is to hang a component under the air duct to adjust the gravity mode of the air duct, or adjust the motor speed to affect the change of its vibration frequency. However, the general structure of the gravity mode cannot be adjusted according to the use environment and cannot completely eliminate the resonance noise; the adjustment of the motor speed will affect the change of the air volume, resulting in the inability to completely eliminate the resonance noise, and its adjustable range is limited. Therefore, the existing noise adjustment scheme for range hoods has the problem of not being able to completely eliminate the resonance noise, and the user experience is poor.

[0033] Based on this, the embodiments of the present invention provide a method, device and range hood for adjusting abnormal noise of a range hood, and specifically provide a method for improving abnormal noise based on changing the force mode of the air duct by an electromagnet. The force mode of the air duct can be changed by an electromagnet, and the vibration frequency of the air duct can be adjusted without adjusting the vibration frequency of the motor, thereby completely eliminating the problem of resonant abnormal noise and improving the user experience.

[0034] To facilitate understanding of this embodiment, a method for adjusting abnormal noise of a range hood disclosed in an embodiment of the present invention is first introduced in detail.

[0035] Embodiment 1:

[0036] The embodiment of the present invention provides a method for adjusting the abnormal sound of a range hood, see Figure 1 The flowchart of a method for adjusting abnormal noise of a range hood is shown, and the method for adjusting abnormal noise of a range hood comprises the following steps:

[0037] Step S102, after the range hood runs stably, the air duct vibration frequency and the motor vibration frequency of the range hood are obtained.

[0038] In this embodiment, after the range hood is running stably (for example, a delay of 3 seconds means stable operation by default), the abnormal sound adaptive adjustment can be performed to obtain the air duct vibration frequency and motor vibration frequency of the range hood. The air duct vibration frequency can be referred to as the air duct vibration frequency or the fan vibration frequency, and the motor vibration frequency can be referred to as the motor vibration frequency.

[0039] In some embodiments, the vibration frequency of the air duct of the range hood is obtained by a vibration frequency sensor disposed in the air duct of the range hood; and the vibration frequency of the motor of the range hood is obtained by a vibration frequency sensor disposed in the motor of the range hood.

[0040] See also Figure 2 The module schematic diagram of a range hood is shown in FIG. Figure 2 As shown, a first frequency sensor 1 and a second frequency sensor 2 can be installed at the bottom of the air duct and the bottom of the motor respectively. The first frequency sensor 1 and the second frequency sensor 2 read the frequency signals of the motor and the air duct respectively and transmit them to the data processing module for data analysis. After analyzing the data, the data processing module further controls the electromagnet and the motor, thereby adjusting the resonance of the air duct and the motor.

[0041] Step S104: taking the difference between the motor vibration frequency and the air duct vibration frequency as the frequency vibration difference, and determining whether the air duct vibration frequency and the motor vibration frequency are the same frequency based on the frequency vibration difference.

[0042] In this embodiment, the difference between the motor vibration frequency m and the duct vibration frequency n can be used as the frequency vibration difference p, that is, p=mn, and then based on whether the frequency vibration difference p meets the set value, it is determined whether the duct vibration frequency and the motor vibration frequency are the same frequency.

[0043] In some embodiments, the operating gear of the range hood can be obtained to determine the limit frequency difference corresponding to the operating gear; if the frequency frequency difference is less than the limit frequency difference, it is determined that the air duct vibration frequency and the motor vibration frequency are the same frequency; if the frequency frequency difference is greater than or equal to the limit frequency difference, it is determined that the air duct vibration frequency and the motor vibration frequency are different frequencies.

[0044] Take the range hood with three gears of a, b, and c as an example. After the range hood is started at gear a, if the frequency difference p is less than the limit frequency difference x, it is determined to be the same frequency. Among them, the limit frequency difference x can be related to the structural material of the range hood air duct and the motor gear, and the limit frequency difference x can be a constant.

[0045] In this embodiment, the limit frequency difference x can be determined by testing preset samples. For example, the three gears a, b, and c correspond to three x values ​​respectively, and each gear is tested by a large number of range hoods of the same model and gear to take the maximum value as the limit frequency difference x of the gear.

[0046] Step S106, if the vibration frequency of the air duct and the vibration frequency of the motor are the same frequency, adjust the vibration frequency of the air duct through an electromagnet; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, adjust the position of the electric push rod, and determine the vibration frequency of the air duct based on the adjusted position of the electric push rod; wherein the electric push rod is connected to the fixing seat at the bottom of the air duct through an elastic member.

[0047] If the frequency vibration difference p is less than the limit frequency vibration difference x, there is a resonant sound in the range hood and abnormal sound adjustment is required. If the frequency vibration difference p is greater than or equal to the limit frequency vibration difference x, it means different frequencies, that is, no abnormal sound adjustment is required and the program ends.

[0048] The present embodiment can adjust the abnormal noise in two ways, namely, adjusting the motor speed and adjusting the air duct electromagnetic. Among them, only the motor speed adjustment or the air duct electromagnetic adjustment can be performed, or the motor speed adjustment and the air duct electromagnetic adjustment can be performed at the same time.

[0049] The electromagnetic adjustment of the air duct is to adjust the vibration frequency of the air duct by the electromagnet. In addition to adjusting the vibration frequency of the air duct by the electromagnet, the present embodiment can also adjust the position of the electric push rod, and determine the vibration frequency of the air duct based on the adjusted position of the electric push rod.

[0050] It should be noted here that this embodiment can simultaneously adopt a method of adjusting the air duct vibration frequency by an electromagnet and a method of determining the air duct vibration frequency by the position of an electric push rod, or it can adopt a method of adjusting the air duct vibration frequency by an electromagnet or a method of determining the air duct vibration frequency by the position of an electric push rod.

[0051] The embodiment of the present invention provides a method for adjusting abnormal noise of a range hood. After the range hood is running stably, the air duct vibration frequency and the motor vibration frequency of the range hood are obtained; the difference between the motor vibration frequency and the air duct vibration frequency is used as the frequency-frequency difference, and whether the air duct vibration frequency and the motor vibration frequency are the same frequency is determined based on the frequency-frequency difference; if the air duct vibration frequency and the motor vibration frequency are the same frequency, the air duct vibration frequency is adjusted by an electromagnet; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, the position of the electric push rod is adjusted, and the air duct vibration frequency is determined based on the adjusted position of the electric push rod; wherein the electric push rod is connected to the fixing seat at the bottom of the air duct through an elastic member. In this method, the force mode of the air duct can be changed by the electromagnet, and the air duct vibration frequency can be adjusted without adjusting the motor vibration frequency, thereby completely eliminating the problem of resonance abnormal noise and improving the user experience.

[0052] Embodiment 2:

[0053] This embodiment provides another method for adjusting the abnormal sound of a range hood. This method is implemented on the basis of the above embodiment, and focuses on the step of adjusting the vibration frequency of the air duct by using an electromagnet. Figure 3 The flowchart of another method for adjusting abnormal noise of a range hood is shown, and the method for adjusting abnormal noise of a range hood comprises the following steps:

[0054] Step S302, after the range hood runs stably, the air duct vibration frequency and the motor vibration frequency of the range hood are obtained.

[0055] Step S304: taking the difference between the motor vibration frequency and the air duct vibration frequency as the frequency vibration difference, and determining whether the air duct vibration frequency and the motor vibration frequency are the same frequency based on the frequency vibration difference.

[0056] Step S306: If the vibration frequency of the air duct is the same as the vibration frequency of the motor, adjust the current of the electromagnet disposed in the air duct, and determine the vibration frequency of the air duct based on the adjusted current of the electromagnet.

[0057] In this embodiment, the electromagnet can act on the magnetic material at the bottom of the air duct, causing the force mode of the air duct to change. At this time, the vibration frequency of the air duct changes. After the air duct is subjected to force, its vibration mode is naturally suppressed, and the vibration frequency n of the air duct will decrease accordingly; since the motor speed remains unchanged, the motor vibration frequency m also remains basically unchanged, so the frequency-frequency difference p increases. When the frequency-frequency difference p exceeds the limit frequency difference x, the abnormal sound is eliminated.

[0058] The above-mentioned abnormal sound adjustment scheme provided in this embodiment can eliminate abnormal sounds in different situations. First, the magnetic force adjustment strength under different gears is preset to ensure that the change in the air duct vibration frequency under the intervention of magnetic force is greater than the limit frequency difference x value. The control design of magnetic force is to increase the electromagnet coil, and then adjust the magnitude of the electromagnet current to control the magnitude of the magnetic force. Under normal circumstances, the intervention of magnetic force only changes the force on the air duct, resulting in a change in the vibration frequency of the air duct, while the vibration frequency of the motor remains basically unchanged. The extreme value of magnetic force is designed according to the value of x to ensure that the change in the vibration frequency value of the air duct under the influence of the maximum magnetic force is greater than 2x (generally speaking, the change in n is greater than x). Thus, the resonance interval between the air duct and the motor is avoided.

[0059] In some embodiments, if the magnetic force value of the electromagnet and the influence of the electromagnet on the vibration frequency of the air duct are in a first mapping relationship that is approximately linearly positively correlated, and the change in the vibration frequency of the air duct is equal to twice the limit frequency difference (that is, the change in the vibration frequency of the air duct is 2x), the current of the electromagnet is determined by the following formula: I = (1.5x-m+n)i / 2; wherein I is the current of the electromagnet, x is the limit frequency difference, m is the motor vibration frequency, and n is the air duct vibration frequency.

[0060] See also Figure 4 The schematic diagram of a method for adjusting the abnormal noise of a range hood is shown. The fan is started at a certain gear and starts to run stably (after running for 3 seconds). The vibration sensor obtains the motor vibration frequency m, the air duct vibration frequency n, and the frequency difference p=mn. m is always greater than n.

[0061] The change z of the duct vibration frequency can be determined by the p value and the preset limit frequency difference x, that is, xp = x-m + n = z. If z is less than or equal to 0, it means that there is no resonance abnormal sound at this time. If z is greater than 0, there is resonance abnormal sound. The maximum influence of the electromagnet on the duct vibration frequency at the same gear is basically a fixed value. The influence amount and the required correction amount are converted. The magnetic force of the electromagnet F = B×I×L, (B is the magnetic induction intensity, L is the length of the electromagnet). The greater the magnetic force, the greater the influence on the duct vibration frequency value. When the current is 0, the magnetic force is 0, the frequency influence is 0, and the current is i (i is the maximum current of the power board), the magnetic force is the largest, and the maximum influence of the electromagnet on the duct vibration frequency is 2x. The influence of the duct vibration frequency is represented by h.

[0062] In some embodiments, if the error between the actual value and the theoretical value of the motor vibration frequency is within a preset range, it is determined that the magnetic force value of the magnet and the influence of the electromagnet on the vibration frequency of the air duct are in a first mapping relationship.

[0063] There is a first mapping relationship between the magnetic force value and the influence h of the duct vibration frequency, which is approximately linearly positively correlated. Its expression can be approximately written as h=kF=kBIL, where k is the approximate linear correlation coefficient and is a constant, indicating that the larger I is, the larger h is. In addition, when I=0, h=0, and when I=i is the maximum, h=2x, and thus k=2x / BiL is converted (here is an imaginary approximate linear function mapping relationship, and the mapping relationship between h and i can be a quadratic or cubic function according to the influence of the duct structure, but they are all positively correlated monotonic functions) to set the correction frequency difference requirement xph=-0.5x (-0.5x means that the surface z is less than 0 and there is no abnormal sound). -0.5x=xph, h=1.5xp, and the conversion can obtain the current size of the electromagnet I=(1.5x-m+n)i / 2x, and the control power board supplies the corresponding current value I to the electromagnet. After the power supply is completed, the electromagnet acts on the duct to affect its vibration frequency value, and the abnormal sound adjustment is completed.

[0064] However, the above-mentioned abnormal sound adjustment method is applicable to range hoods in which the magnetic force value of the magnet and the influence of the electromagnet on the vibration frequency of the air duct form the first mapping relationship, which is called Class I range hoods. The mapping relationship of Class I range hoods is demonstrated before leaving the factory, and its mapping relationship can reflect the influence of the magnetic force on the change of the vibration frequency of the air duct to a certain extent.

[0065] See also Figure 5Schematic diagram of another method for adjusting the abnormal noise of range hoods. Class I range hoods require high structural consistency to be implemented. If the vibration frequency of the motor is within ±5% (that is, the error between the actual value of the air duct vibration frequency and the theoretical value of the air duct vibration frequency determined based on the expression is within ±5%), it can be represented as a Class I range hood. Under the same gear, if the motor power and structure are consistent, its vibration frequency value is usually a fixed value, and within 5%, it is represented as a Class I range hood. Its mapping relationship curve can be applied to electromagnetic adjustment.

[0066] In some embodiments, if the magnetic force value of the electromagnet and the influence of the electromagnet on the vibration frequency of the duct are not in a first mapping relationship, the vibration frequency of the duct is adjusted to redetermine whether the vibration frequency of the duct and the vibration frequency of the motor are the same frequency; if the vibration frequency of the duct and the vibration frequency of the motor are the same frequency, the vibration frequency of the motor is adjusted at least once to redetermine whether the vibration frequency of the duct and the vibration frequency of the motor are the same frequency; if the vibration frequency of the duct and the vibration frequency of the motor are the same frequency, the vibration frequency of the duct is readjusted until the vibration frequency of the duct reaches a preset maximum gear.

[0067] like Figure 5 As shown, during the production process of range hoods, there are structural differences in the installation of parts, and the structural strength of the parts will be weakened during the transportation and installation process. During long-term use, the motor will operate for a long time, and its own structure will be weakened to a certain extent due to the vibration of the motor. Therefore, the first mapping relationship will change. The weakening of the structure will inevitably lead to changes in the vibration frequency of the motor. When the vibration frequency value of the motor exceeds the theoretical value by more than 5%, the first mapping relationship is no longer applicable. At this time, multiple adaptive adjustments are required. This type of range hood is a Class II range hood.

[0068] like Figure 5 As shown, the specific method for adjusting Class II range hoods is as follows: record the number of cycles N, and after the fan runs stably (delay of 3s means stable operation by default), read the vibration frequency of the air duct and the vibration frequency of the motor through the vibration frequency sensors arranged on the air duct and the motor. If they are different frequencies, the program ends (the judgment method is that there is a difference A in the resonant frequency of the motor and the air duct. Under this difference range, it is judged that there is a resonant sound at the same frequency, and the frequency exceeds the difference A. The difference A is a constant, and the difference A is the resonance range interval under the weakened range hood structure. It can be tested through a large number of Class II range hoods, including the A value after the motor speed is adjusted, and the maximum value of the sample is taken).

[0069] like Figure 5 As shown, if the frequency is the same, when the number of cycles N=1, adjust the vibration frequency of the air duct (the motor maintains the original speed, assuming that the motor speed can be adjusted 1 time), and re-compare the vibration frequency data after adjusting the motor speed. If the frequency is different, the program ends.

[0070] In some embodiments, the motor vibration frequency can be adjusted to re-determine whether the duct vibration frequency and the motor vibration frequency are the same frequency; if the duct vibration frequency and the motor vibration frequency are the same frequency, the motor vibration frequency is readjusted until the motor vibration frequency reaches a preset maximum gear.

[0071] like Figure 5 As shown, if the frequency is the same, when the number of cycles N = 2, 3, 4, adjust the motor vibration frequency, adjust the magnetism of the electromagnet to increase (assuming that the magnetism of the electromagnet can change three times), adjust the magnetism of the electromagnet to re-compare the vibration frequency data, if the frequency is different, the program ends. If the frequency is the same, continue to adjust the magnetism of the electric push rod until the vibration frequency of the motor and the air duct are different. Figure 5 The motor vibration frequency can be adjusted up to 3 times per round shown.

[0072] like Figure 5 As shown, when N=5, readjust the motor speed, and re-compare the vibration frequency data after adjusting the motor speed. If the frequencies are different, the program ends. If they are the same frequency, when the number of cycles N=6, 7, and 8, adjust the magnetism of the electromagnet to increase, adjust the electric push rod and re-compare the vibration frequency data. If the frequencies are different, the program ends. If they are the same frequency, continue to adjust the magnetism of the electric push rod until the vibration frequencies of the motor and the air duct are different at the same time, or the program ends when N=9 (that is, the air duct vibration frequency is adjusted up to 3 times). After the program is adjusted, since it is a unidirectional magnetic force increase adjustment, the difference A has reached the maximum value, and the abnormal sound has been weakened to the greatest extent.

[0073] It should be noted here that the number of changes can be further optimized. The N value is related to the motor and electromagnet adjustment gear, and can be further subdivided and changed according to the number of gears. The more subdivided the number of electromagnet and motor gears are, the more accurate the control of the minimum power of the electromagnet current is, and the power can be reduced to a certain extent.

[0074] In some embodiments, the position of the electric push rod can also be adjusted, and the vibration frequency of the air duct can be determined based on the adjusted position of the electric push rod; wherein the electric push rod is connected to a fixing seat at the bottom of the air duct via a spring.

[0075] This embodiment can control the extension and contraction amount of the electric push rod, thereby controlling the pulling force of the spring on the air duct, thereby adjusting the force mode of the air duct.

[0076] In addition, this embodiment mentions a variety of ways to eliminate abnormal noise, such as: adjusting the vibration frequency of the air duct through an electromagnet, adjusting the vibration frequency of the air duct through an electric push rod, adjusting the vibration frequency of the motor through the motor speed, etc.

[0077] For example, see Figure 6 A schematic diagram of a range hood noise elimination method and Figure 7Another schematic diagram of a range hood noise elimination method is shown. This embodiment can use one or more of the above methods to eliminate the noise, and the specific arrangement and combination method is not limited in this embodiment. For example, the vibration frequency of the air duct can be adjusted by adjusting the vibration frequency of the air duct through an electromagnet, adjusting the vibration frequency of the air duct through an electric push rod, and adjusting the vibration frequency of the motor through the motor speed. One, two or three methods can be used for adjustment.

[0078] Embodiment three:

[0079] Corresponding to the above method embodiment, the embodiment of the present invention provides a noise adjustment device for a range hood, see Figure 8 The structural schematic diagram of a noise adjustment device for a range hood is shown, and the noise adjustment device for the range hood comprises:

[0080] The vibration frequency determination module 81 is used to obtain the air duct vibration frequency and the motor vibration frequency of the range hood after the range hood is running stably;

[0081] A same-frequency resonance judgment module 82 is used to use the difference between the motor vibration frequency and the air duct vibration frequency as a frequency vibration difference, and determine whether the air duct vibration frequency and the motor vibration frequency are of the same frequency based on the frequency vibration difference;

[0082] The vibration frequency adjustment module 83 is used to adjust the vibration frequency of the air duct through an electromagnet if the vibration frequency of the air duct and the vibration frequency of the motor are the same; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, adjust the position of the electric push rod, and determine the vibration frequency of the air duct based on the adjusted position of the electric push rod; wherein the electric push rod is connected to the fixing seat at the bottom of the air duct through an elastic member.

[0083] The embodiment of the present invention provides a noise adjustment device for a range hood. After the range hood is running stably, the air duct vibration frequency and the motor vibration frequency of the range hood are obtained; the difference between the motor vibration frequency and the air duct vibration frequency is used as the frequency-frequency difference, and whether the air duct vibration frequency and the motor vibration frequency are the same frequency is determined based on the frequency-frequency difference; if the air duct vibration frequency and the motor vibration frequency are the same frequency, the air duct vibration frequency is adjusted by an electromagnet; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, the position of the electric push rod is adjusted, and the air duct vibration frequency is determined based on the adjusted position of the electric push rod; wherein the electric push rod is connected to the fixing seat at the bottom of the air duct through an elastic member. In this way, the force mode of the air duct can be changed by the electromagnet, the air duct vibration frequency can be adjusted without adjusting the motor vibration frequency, thereby completely eliminating the problem of resonance noise and improving the user experience.

[0084] The vibration frequency determination module is used to obtain the vibration frequency of the air duct of the range hood through a vibration frequency sensor arranged in the air duct of the range hood; and to obtain the vibration frequency of the motor of the range hood through a vibration frequency sensor arranged in the motor of the range hood.

[0085] The above-mentioned same-frequency resonance judgment module is used to obtain the operating gear of the range hood and determine the limit frequency difference corresponding to the operating gear; if the frequency-frequency difference is less than the limit frequency difference, it is determined that the duct vibration frequency and the motor vibration frequency are the same frequency; if the frequency-frequency difference is greater than or equal to the limit frequency difference, it is determined that the duct vibration frequency and the motor vibration frequency are different frequencies.

[0086] The vibration frequency adjustment module is used to adjust the current of the electromagnet disposed in the air duct, and determine the vibration frequency of the air duct based on the adjusted current of the electromagnet.

[0087] The above-mentioned vibration frequency adjustment module is used to determine the current of the electromagnet by the following formula if the magnetic force value of the electromagnet and the influence of the electromagnet on the vibration frequency of the air duct are in a first mapping relationship that is approximately linearly positively correlated, and the change in the vibration frequency of the air duct is equal to twice the limit frequency difference: I = (1.5x-m+n)i / 2; wherein I is the current of the electromagnet, x is the limit frequency difference, m is the motor vibration frequency, and n is the air duct vibration frequency.

[0088] The vibration frequency adjustment module is also used to determine that the magnetic force value of the magnet and the influence of the electromagnet on the vibration frequency of the air duct are in a first mapping relationship if the error between the actual value and the theoretical value of the motor vibration frequency is within a preset range.

[0089] The above-mentioned vibration frequency adjustment module is also used to adjust the vibration frequency of the duct if the magnetic force value of the electromagnet and the influence of the electromagnet on the vibration frequency of the duct are not in the first mapping relationship, and redetermine whether the vibration frequency of the duct and the vibration frequency of the motor are the same frequency; if the vibration frequency of the duct and the vibration frequency of the motor are the same frequency, adjust the vibration frequency of the motor at least once, and redetermine whether the vibration frequency of the duct and the vibration frequency of the motor are the same frequency; if the vibration frequency of the duct and the vibration frequency of the motor are the same frequency, readjust the vibration frequency of the duct until the vibration frequency of the duct reaches a preset maximum gear.

[0090] The vibration frequency adjustment module is used to adjust the motor vibration frequency and re-determine whether the duct vibration frequency and the motor vibration frequency are the same frequency; if the duct vibration frequency and the motor vibration frequency are the same frequency, readjust the motor vibration frequency until the motor vibration frequency reaches a preset maximum gear.

[0091] Technicians in the relevant field can clearly understand that, for the convenience and brevity of description, the specific working process of the noise adjustment device for range hoods described above can refer to the corresponding process in the aforementioned embodiment of the noise adjustment method for range hoods, and will not be repeated here.

[0092] Embodiment 4:

[0093] The embodiment of the present invention further provides a range hood and a method for adjusting abnormal noise of the range hood.

[0094] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the range hood described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0095] Embodiment five:

[0096] The embodiment of the present invention also provides an electronic device for operating the above-mentioned method for adjusting the abnormal sound of the range hood; see Fig. 9 A structural schematic diagram of an electronic device is shown, which includes a memory 100 and a processor 101, wherein the memory 100 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the above-mentioned method for adjusting the abnormal sound of the range hood.

[0097] Further, Fig. 9 The electronic device shown further includes a bus 102 and a communication interface 103 , and the processor 101 , the communication interface 103 and the memory 100 are connected via the bus 102 .

[0098] The memory 100 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk storage. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used. The bus 102 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 9 Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0099] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 101. The above processor 101 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in conjunction with the embodiments of the present invention can be directly embodied as a hardware decoding processor for execution, or a combination of hardware and software modules in the decoding processor for execution. The software module may be located in a storage medium mature in the art, such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 100, and the processor 101 reads the information in the memory 100 and completes the steps of the method of the above embodiment in combination with its hardware.

[0100] An embodiment of the present invention also provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the above-mentioned range hood noise adjustment method. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0101] The range hood noise adjustment method, device and computer program product of the range hood provided in the embodiments of the present invention include a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the method in the previous method embodiment. The specific implementation can be found in the method embodiment, which will not be repeated here.

[0102] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system and / or device described above can refer to the corresponding process in the aforementioned method embodiment, and will not be repeated here.

[0103] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0104] If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0105] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0106] Finally, it should be noted that the above embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A method for adjusting abnormal noise of a range hood, characterized in that: The method comprises: After the range hood runs stably, obtaining the air duct vibration frequency and the motor vibration frequency of the range hood; Taking the difference between the motor vibration frequency and the air duct vibration frequency as a frequency vibration difference, and determining whether the air duct vibration frequency and the motor vibration frequency are the same frequency based on the frequency vibration difference; If the vibration frequency of the air duct and the vibration frequency of the motor are the same, the vibration frequency of the air duct is adjusted by an electromagnet; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, the position of the electric push rod is adjusted, and the vibration frequency of the air duct is determined based on the adjusted position of the electric push rod; wherein the electric push rod is connected to a fixing seat at the bottom of the air duct through an elastic member.

2. The method according to claim 1, characterized in that The step of obtaining the air duct vibration frequency and the motor vibration frequency of the range hood comprises: Obtaining the vibration frequency of the air duct of the range hood by means of a vibration frequency sensor disposed in the air duct of the range hood; The vibration frequency of the motor of the range hood is obtained by a vibration frequency sensor arranged on the motor of the range hood.

3. The method according to claim 1, characterized in that The step of determining whether the vibration frequency of the air duct and the vibration frequency of the motor are the same frequency based on the frequency vibration difference comprises: Obtaining the operating gear of the range hood, and determining the limit frequency difference corresponding to the operating gear; If the frequency vibration difference is less than the limit frequency vibration difference, it is determined that the vibration frequency of the air duct and the vibration frequency of the motor are the same frequency; If the frequency vibration difference is greater than or equal to the limit frequency vibration difference, it is determined that the vibration frequency of the air duct and the vibration frequency of the motor are out of frequency.

4. The method according to claim 3, characterized in that The step of adjusting the vibration frequency of the air duct by means of an electromagnet comprises: The current of the electromagnet provided in the air duct is adjusted, and the vibration frequency of the air duct is determined based on the adjusted current of the electromagnet.

5. The method according to claim 4, characterized in that The step of adjusting the current of the electromagnet disposed in the air duct comprises: If the magnetic force value of the electromagnet and the influence of the electromagnet on the vibration frequency of the air duct are in a first mapping relationship that is approximately linearly positively correlated, and the change in the vibration frequency of the air duct is equal to twice the limit frequency difference, the current of the electromagnet is determined by the following formula: I = (1.5x-m+n)i / 2; wherein I is the current of the electromagnet, x is the limit frequency difference, m is the motor vibration frequency, and n is the air duct vibration frequency.

6. The method according to claim 5, characterized in that The method further comprises: If the error between the actual value and the theoretical value of the motor vibration frequency is within a preset range, the magnetic force value of the magnet and the influence of the electromagnet on the air duct vibration frequency are determined to be the first mapping relationship.

7. The method according to claim 5, characterized in that After the step of determining whether the vibration frequency of the air duct and the vibration frequency of the motor are the same frequency based on the frequency difference, the method further includes: If the magnetic force value of the electromagnet and the influence of the electromagnet on the vibration frequency of the air duct are not in the first mapping relationship, adjusting the vibration frequency of the air duct, and re-determining whether the vibration frequency of the air duct and the vibration frequency of the motor are the same frequency; If the vibration frequency of the air duct is the same as the vibration frequency of the motor, adjust the vibration frequency of the motor at least once, and re-determine whether the vibration frequency of the air duct is the same as the vibration frequency of the motor; If the vibration frequency of the air duct is the same as the vibration frequency of the motor, the vibration frequency of the air duct is readjusted until the vibration frequency of the air duct reaches a preset maximum gear.

8. The method according to claim 7, characterized in that The step of adjusting the motor vibration frequency at least once and re-determining whether the air duct vibration frequency and the motor vibration frequency are the same frequency comprises: Adjusting the vibration frequency of the motor, and re-determining whether the vibration frequency of the air duct and the vibration frequency of the motor are the same frequency; If the vibration frequency of the air duct is the same as the vibration frequency of the motor, the vibration frequency of the motor is readjusted until the vibration frequency of the motor reaches a preset maximum gear.

9. A noise adjustment device for a range hood, characterized in that: The device comprises: A vibration frequency determination module, used to obtain the air duct vibration frequency and the motor vibration frequency of the range hood after the range hood is running stably; A same-frequency resonance judgment module, used for taking the difference between the motor vibration frequency and the air duct vibration frequency as a frequency-frequency difference, and determining whether the air duct vibration frequency and the motor vibration frequency are of the same frequency based on the frequency-frequency difference; A vibration frequency adjustment module is used to adjust the vibration frequency of the air duct through an electromagnet if the vibration frequency of the air duct is the same as the vibration frequency of the motor; wherein the electromagnet is used to adjust the force mode of the air duct; and / or, adjust the position of the electric push rod, and determine the vibration frequency of the air duct based on the adjusted position of the electric push rod; wherein the electric push rod is connected to a fixing seat at the bottom of the air duct through an elastic member.

10. A range hood, characterized in that: The range hood is used to execute the method for adjusting the abnormal sound of the range hood according to any one of claims 1 to 8.

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