Air conditioning device and control method thereof

Abstract

The present invention relates to an air-conditioning device and a control method thereof. The air-conditioning device includes an air-conditioning device body and an active noise reduction device located on the air-conditioning device body. The active noise reduction device includes a microphone for collecting sound pressure signals, a control module for obtaining the sound pressure signals and performing anti-phase calculations, and a speaker for emitting anti-phase sounds. The control module is further configured to identify high-frequency noise based on the sound pressure signals collected by the microphone and to turn off the active noise reduction device when high-frequency screaming noise is identified. The present invention can prevent the active noise reduction device from emitting high-frequency screaming noise, ensuring that users can tolerate the noise emitted by the air-conditioning device and can use the air-conditioning device normally. The present invention can reduce the risk of complaints during the application of the active noise reduction device and improve the reliability and competitiveness of the active noise reduction device.

Description

Technical Field

[0001] The present invention relates to the technical field of noise elimination of air conditioners, and in particular to an air conditioner and a control method thereof. Background Art

[0002] Air conditioner indoor units are located indoors, significantly impacting users' daily lives, particularly the noise generated during operation. Consequently, active noise reduction technology has begun to be applied to these units. Active noise reduction technology detects noise sources in real time and generates a sound in antiphase to counteract them. This technology effectively reduces noise levels within indoor units, improving user comfort and establishing a technological advantage in the air conditioner market.

[0003] The active noise reduction device of an air conditioner generally uses a speaker to emit a sound that is out of phase with the real-time noise source. However, when the electronic components in the active noise reduction device are damaged, it is very easy to generate high-frequency screaming noise, which makes the user irritable and causes user complaints. To avoid the noise, the user can only turn off the device and wait for repairs, which makes the user unable to use the air conditioner. Summary of the Invention

[0004] The present invention provides an air conditioning device and a control method thereof, which solves the technical problem that when the active noise reduction device of the existing air conditioning device is damaged and generates high-frequency noise, the user becomes irritable and has to shut down the device to wait for repair, resulting in the user being unable to use the air conditioning.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] An air conditioning device, comprising an air conditioning device body and an active noise reduction device located on the air conditioning device body, the active noise reduction device comprising a microphone for collecting sound pressure signals, a control module for acquiring the sound pressure signals and performing anti-phase calculations, and a speaker for emitting the anti-phase sounds, characterized in that the control module is further configured to identify high-frequency noise based on the sound pressure signals collected by the microphone, and to turn off the active noise reduction device when high-frequency noise is identified.

[0007] In some embodiments of the present application, the control module is further configured to convert the sound pressure time domain signal collected by the microphone into a discrete time domain signal, convert the discrete time domain signal into a discrete frequency domain signal, obtain the sound amplitude value and the maximum sound amplitude value corresponding to the discrete frequency, and calculate the maximum sound amplitude value minus the frequency corresponding to the maximum sound amplitude value. fi Adjacent frequency X fi-1 The corresponding sound amplitude value>the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1When the corresponding sound amplitude value is greater than the sound amplitude setting value, the active noise reduction device is turned off.

[0008] In some embodiments of the present application, the air conditioning device includes a counter configured to calculate the maximum sound amplitude minus the frequency X corresponding to the maximum sound amplitude. fi Adjacent frequency X fi-1 The corresponding sound amplitude value>the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1 The control module is further configured to count the number of times the corresponding sound amplitude value is greater than the sound amplitude setting value, and the control module is further configured to turn off the active noise reduction device when the count continuously accumulates and reaches the counting setting value.

[0009] In some embodiments of the present application, the control module is further configured to: fi Adjacent frequency X fi-1 、X fi-2 The corresponding sound amplitude)> the sound amplitude setting value and the maximum sound amplitude-Max(the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 、X fi+2 When the corresponding sound amplitude value) is greater than the sound amplitude setting value, the active noise reduction device is turned off.

[0010] In some embodiments of the present application, the air conditioning device includes a counter configured to count the maximum sound amplitude -Max (the frequency X corresponding to the maximum sound amplitude) fi Adjacent frequency X fi-1 、X fi-2 The corresponding sound amplitude)> the sound amplitude setting value and the maximum sound amplitude-Max(the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 、X fi+2 The control module is further configured to turn off the active noise reduction device when the count continuously accumulates and reaches the set count value.

[0011] A method for controlling an air conditioner, the air conditioner comprising an air conditioner body and an active noise reduction device located on the air conditioner body, the active noise reduction device comprising a microphone for collecting sound pressure signals, a control module for acquiring the sound pressure signals and performing anti-phase calculation, and a speaker for emitting the anti-phase sound, the control method comprising the following steps:

[0012] identifying high-frequency noise based on the sound pressure signal collected by the microphone;

[0013] The active noise reduction device is deactivated when high-frequency noise is detected.

[0014] In some embodiments of the present application, the method for identifying high-frequency noise is as follows: converting the sound pressure time domain signal collected by the microphone into a discrete time domain signal, converting the discrete time domain signal into a discrete frequency domain signal, obtaining the sound amplitude and maximum sound amplitude corresponding to the discrete frequency, the maximum sound amplitude minus the frequency corresponding to the maximum sound amplitude x fi Adjacent frequency X fi-1 The corresponding sound amplitude value>the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1 When the corresponding sound amplitude value is greater than the sound amplitude setting value, it is identified as the high-frequency noise.

[0015] In some embodiments of the present application, the method for identifying high-frequency noise is: the maximum sound amplitude minus the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi-1 The corresponding sound amplitude value>the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1 The corresponding sound amplitude value is greater than the sound amplitude setting value, and the case where the count continuously accumulates and reaches the counting setting value is identified as the high-frequency noise.

[0016] In some embodiments of the present application, the method for identifying high-frequency noise is: at the maximum sound amplitude -Max (the frequency X corresponding to the maximum sound amplitude) fi Adjacent frequency X fi-1 、X fi-2 The corresponding sound amplitude)> the sound amplitude setting value and the maximum sound amplitude-Max(the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 、X fi+2 When the corresponding sound amplitude value) is greater than the sound amplitude setting value, it is identified as the high-frequency noise.

[0017] In some embodiments of the present application, the method for identifying high-frequency noise is: for the maximum sound amplitude -Max (the frequency X corresponding to the maximum sound amplitude) fi Adjacent frequency X fi-1 、X fi-2 The corresponding sound amplitude)> the sound amplitude setting value and the maximum sound amplitude-Max(the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 、X fi+2The control module is further configured to count the cases where the sound amplitude value corresponding to the sound amplitude value) is greater than the sound amplitude setting value, and the control module is further configured to identify it as the high-frequency noise when the count continuously accumulates and reaches the counting setting value.

[0018] The technical solution of the present invention has the following technical effects compared to the prior art: the air-conditioning device of the present invention includes an air-conditioning device body and an active noise reduction device located on the air-conditioning device body, the active noise reduction device includes a microphone for collecting sound pressure signals, a control module for obtaining sound pressure signals and performing anti-phase calculations, and a speaker for emitting anti-phase sounds, and the control module is further configured to identify high-frequency noise based on the sound pressure signals collected by the microphone, and turn off the active noise reduction device when high-frequency screaming noise is identified. The present invention can prevent the active noise reduction device from emitting high-frequency screaming noise, ensuring that users can tolerate the noise emitted by the air-conditioning device and can use the air-conditioning normally. The present invention can reduce the risk of complaints during the application of the active noise reduction device and improve the reliability and competitiveness of the active noise reduction device.

[0019] The air-conditioning device of the present invention includes an air-conditioning device body and an active noise reduction device located on the air-conditioning device body. The active noise reduction device includes a microphone for collecting sound pressure signals, a control module for obtaining sound pressure signals and performing anti-phase calculations, and a speaker for emitting anti-phase sounds. The control method of the air-conditioning device includes the following steps: identifying high-frequency noise based on the sound pressure signals collected by the microphone; and turning off the active noise reduction device when high-frequency noise is identified. The present invention can prevent the active noise reduction device from emitting high-frequency screaming noise, ensuring that users can tolerate the noise emitted by the air-conditioning device and can use the air-conditioning device normally. The present invention can reduce the risk of complaints during the application of the active noise reduction device and improve the reliability and competitiveness of the active noise reduction device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 Schematic diagram of an air conditioning device according to a specific embodiment of the present invention.

[0022] Figure 2 Schematic diagram of the structure of an active noise reduction device according to a specific embodiment of the present invention.

[0023] Figure 3 2 is a cross-sectional view of an active noise reduction device according to a specific embodiment of the present invention.

[0024] Figure 4It is a principle block diagram of an air conditioning device according to a specific embodiment of the present invention.

[0025] Figure 5 It is a principle block diagram of an air conditioning device according to a specific embodiment of the present invention.

[0026] Figure 6 This is a coordinate diagram of the time-domain sound pressure signal collected by the microphone in a specific embodiment of the present invention.

[0027] Figure 7 This is a discrete time domain signal coordinate diagram of a specific embodiment of the present invention.

[0028] Figure 8 This is a discrete frequency domain signal coordinate diagram of a specific embodiment of the present invention.

[0029] Figure 9 This is a flow chart of a control method according to a specific embodiment of the present invention.

[0030] Figure 10 This is a flow chart of a control method according to another specific embodiment of the present invention.

[0031] Figure 11 This is a flow chart of a control method according to another specific embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0033] In the description of this application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply 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 a limitation on this application.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0036] The air conditioner performs the refrigeration cycle of the air conditioner by using a compressor, condenser, throttling device and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the air that has been conditioned and heat exchanged.

[0037] The compressor compresses high-temperature, high-pressure refrigerant gas and discharges the compressed gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, releasing heat into the surrounding environment through the condensation process.

[0038] The throttling device expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves a cooling effect by utilizing the latent heat of evaporation to exchange heat with the material being cooled. Throughout this cycle, the air conditioner regulates the temperature of the indoor space.

[0039] The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and a throttling device may be provided in the indoor unit or the outdoor unit.

[0040] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner functions as a heater in heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0041] An air conditioning device includes an outdoor unit and an indoor unit, wherein there is at least one outdoor unit and at least one indoor unit. The air conditioning device can be a conventional air conditioning device including one indoor unit and one outdoor unit, or a multi-split air conditioning device including one (or more) outdoor units and multiple indoor units.

[0042] like Figure 1-5 As shown, the air conditioning device includes an air conditioning device body 1 and an active noise reduction device 23 located on the air conditioning device body 1.

[0043] The air-conditioning device body 1 is the indoor unit mentioned above.

[0044] In some embodiments, the indoor unit includes a housing and components such as an indoor heat exchanger, an indoor fan, an air duct, and a water tray located within the housing. For example, the air conditioner body 1 is a floor-standing air conditioner, a wall-mounted air conditioner, a window-type air conditioner, or an integrated air conditioner.

[0045] In some embodiments, the air conditioning device body 1 is a ducted air conditioner.

[0046] In some embodiments, the air conditioning device body 1 is a fresh air fan.

[0047] The air conditioning device is an air conditioning device including an active noise reduction device 23 .

[0048] like Figure 2-4 As shown, the active noise reduction device includes at least a microphone 2, a control module and a speaker 3. The microphone 2 and the speaker 3 are connected to the control module and the power module of the air conditioner body 1 through wires. The power module supplies power to the microphone 2 and the speaker 3. The control module receives the signal from the microphone 2 and outputs the signal to the speaker 3.

[0049] In some embodiments, the microphone 2 and the speaker 3 and their corresponding circuits are connected to the power module of the air conditioning device body 1 through a switch.

[0050] When the switch is closed, the microphone 2, the speaker 3 and the corresponding circuits are powered on and the active noise reduction device works. When the switch is opened, the microphone 2, the speaker 3 and the corresponding circuits are powered off and the active noise reduction device stops working.

[0051] In some embodiments, the high-frequency noise is mainly emitted by the speaker 3 , and thus the speaker 3 and its corresponding circuit are connected to the power module of the air conditioning device body 1 through a switch.

[0052] When the switch is closed, the speaker 3 and the corresponding circuit are powered on, and the active noise reduction device works. When the switch is open, the speaker 3 and the corresponding circuit are powered off, and the active noise reduction device stops working.

[0053] In some embodiments, the control module may not output a signal to the speaker, so that the speaker does not make any sound, which is also a situation where the active noise reduction device stops working.

[0054] The control module may be a separate controller for the active noise reduction device, or may be integrated into a master controller of the air conditioning device.

[0055] Microphone 2 is used to collect sound pressure signals.

[0056] The microphone 2 collects noise sound pressure signals generated during the operation of the air-conditioning device body 1 , for example, component resonance noise generated by air flow during the operation of the air-conditioning device body 1 .

[0057] The control module is used to obtain the sound pressure signal collected by the microphone and perform anti-phase calculation on the sound pressure signal to obtain a sound control signal, and send the sound control signal to the speaker 3.

[0058] The loudspeaker 3 is used to emit anti-phase sound according to the sound control signal.

[0059] The anti-phase sound emitted by the loudspeaker 3 and the sound generated by the noise source cancel each other out, achieving the effect of eliminating noise.

[0060] However, since there is a risk of damage during the operation of the active noise reduction device, when the active noise reduction device is damaged, for example, when the speaker 3 or the corresponding circuit is damaged, it is very easy to generate high-frequency noise and emit high-frequency screaming noise, causing the user to feel irritable and causing user complaints.

[0061] In order to avoid the above situation, the control module is designed and configured to identify high-frequency noise based on the sound pressure signal collected by microphone 2. When high-frequency noise is identified, the active noise reduction device is turned off, so that the active noise reduction device stops working to avoid the continuous generation of high-frequency screaming noise and causing discomfort to the user.

[0062] Among them, the way to turn off the active noise reduction device is to turn off the switch, cut off the power supply to the microphone 2, the speaker 3 and its corresponding circuits, or cut off the power supply to the speaker 3 and its corresponding circuits, or the control module does not output the control signal to the speaker 3.

[0063] Specifically, the control module is further configured to convert the sound pressure time domain signal (such as Figure 6 As shown) into a discrete time domain signal (as Figure 7 As shown), the discrete time domain signal is converted into a discrete frequency domain signal (as Figure 8 shown);

[0064] Get the corresponding sound amplitude and maximum sound amplitude A under discrete frequencies fi ;

[0065] At the maximum sound amplitude A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 >Amplitude setting value and maximum amplitude value A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency Xfi+1 The corresponding sound amplitude A fi+1 > the sound amplitude setting value, it means there is high-frequency noise and the active noise reduction device is turned off.

[0066] In some embodiments, the control module converts the sound pressure time domain signal collected by the microphone 2 into a discrete time domain signal, wherein the discrete time domain signal is a digital signal.

[0067] For example, the discrete time x t1 ,x t2 ,x t3 ,...,x tn ; The corresponding sound pressure amplitude at discrete time is: P t1 ,P t2 ,P t3 ,...,P tn .

[0068] Perform fast Fourier transform on discrete time domain signals to convert them into discrete frequency domain data signals.

[0069] Among them, the discrete frequency is: x f1 ,x f2 ,x f3 ,...,x fn ; The corresponding sound amplitude at discrete frequency is: A f1 ,A f2 ,A f3 ,...,A f .

[0070] Get the maximum sound amplitude A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 .

[0071] At the maximum sound amplitude A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 >Amplitude setting value and maximum amplitude value Afi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 If the sound level exceeds the set value, the active noise reduction system is turned off. At this point, the control module outputs an alarm indicating an active noise reduction system failure. If the above conditions are not met, both the air conditioning system and the active noise reduction system are operating normally.

[0072] The sound amplitude setting value is any value between 10-20dBA.

[0073] In some embodiments, as Figure 5 As shown, the air conditioning device further includes a counter configured to fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 >Amplitude setting value and maximum amplitude value A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 The control module counts the number of times the sound amplitude exceeds a set value. When the count reaches the set value, the control module indicates a persistent high-frequency squealing noise. In this case, the active noise reduction device is likely to be faulty, and the active noise reduction device is deactivated. This solution can prevent the active noise reduction device from misdiagnosing the occasional high-frequency squealing noise as a fault.

[0074] The count setting value is any value greater than 10.

[0075] In some embodiments, the count setting value is any value between 10-1000.

[0076] Specifically, 1): the control module converts the sound pressure time domain signal collected by the microphone 2 into a discrete time domain signal, wherein the discrete time domain signal is a digital signal.

[0077] For example, the discrete time x t1 ,x t2 ,x t3 ,...,x tn ; The corresponding sound pressure amplitude at discrete time is: P t1 ,P t2 ,P t3 ,...,P tn .

[0078] 2): Perform fast Fourier transform on the discrete time domain signal to convert the discrete time domain signal into discrete frequency domain data signal.

[0079] Among them, the discrete frequency is: x f1 ,x f2 ,x f3 ,...,x fn ; The corresponding sound amplitude at discrete frequency is: A f1 ,A f2 ,A f3 ,...,A f .

[0080] 3): Get the maximum sound amplitude A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 .

[0081] 4): When the judgment conditions are not met, the air conditioning device operates normally and the counter is reset to 0. When the judgment conditions are met, the counter accumulates counts and the air conditioning device operates normally. Repeat 1)-4). When the counter reaches the set count value, it indicates that there is a continuous high-frequency screaming noise and the active noise reduction device is turned off. At this time, the control module outputs an alarm prompt - active noise reduction device failure.

[0082] Among them, the judgment conditions are: the maximum sound amplitude A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 >Amplitude setting value and maximum amplitude value A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 >Amplitude setting value.

[0083] In some embodiments, in order to improve the recognition accuracy of high-frequency noise, the control module is further configured tofi -Max(the frequency corresponding to the maximum sound amplitude X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>the sound amplitude setting value and the maximum sound amplitude value A fi -Max(the frequency corresponding to the maximum sound amplitude X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 )>the set value for the sound amplitude, it is identified as high-frequency noise and the active noise reduction device is turned off.

[0084] In some embodiments, the control module converts the sound pressure time domain signal collected by the microphone 2 into a discrete time domain signal, wherein the discrete time domain signal is a digital signal.

[0085] For example, the discrete time x t1 ,x t2 ,x t3 ,...,x tn ; The corresponding sound pressure amplitude at discrete time is: P t1 ,P t2 ,P t3 ,...,P tn .

[0086] Perform fast Fourier transform on discrete time domain signals to convert them into discrete frequency domain data signals.

[0087] Among them, the discrete frequency is: x f1 ,x f2 ,x f3 ,...,x fn ; The corresponding sound amplitude at discrete frequency is: A f1 ,A f2 ,A f3 ,...,A f .

[0088] Get the maximum sound amplitude A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1, frequency X fi-2 The corresponding sound amplitude A fi-2 , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 .

[0089] At the maximum sound amplitude A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>the sound amplitude setting value and the maximum sound amplitude value A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 ) > the set value for the sound amplitude, the active noise reduction system is turned off. At this point, the control module outputs an alarm indicating an active noise reduction system failure. If the above conditions are not met, both the air conditioning system and the active noise reduction system can operate normally.

[0090] The sound amplitude setting value is any value between 10-20dBA.

[0091] In some embodiments, the air conditioning device includes a counter configured to count the maximum sound amplitude A fi -Max(the frequency corresponding to the maximum sound amplitude X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>sound amplitude setting value and maximum sound amplitude-Max(frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2)> a set value for the sound amplitude. The control module is further configured to count instances where the sound amplitude exceeds the set value. When the count reaches the set value, it indicates that there is a persistent high-frequency squealing noise. In this case, the active noise reduction device is likely to be faulty, and the active noise reduction device is therefore disabled. This solution can avoid misjudging the active noise reduction device from occasionally emitting high-frequency squealing noise rather than a fault.

[0092] The count setting value is any value greater than 10.

[0093] In some embodiments, the count setting value is any value between 10-1000.

[0094] Specifically, 1): the control module converts the sound pressure time domain signal collected by the microphone 2 into a discrete time domain signal, wherein the discrete time domain signal is a digital signal.

[0095] For example, the discrete time x t1 ,x t2 ,x t3 ,...,x tn ; The corresponding sound pressure amplitude at discrete time is: P t1 ,P t2 ,P t3 ,...,P tn .

[0096] 2): Perform fast Fourier transform on the discrete time domain signal to convert the discrete time domain signal into discrete frequency domain data signal.

[0097] Among them, the discrete frequency is: x f1 ,x f2 ,x f3 ,...,x fn ; The corresponding sound amplitude at discrete frequency is: A f1 ,A f2 ,A f3 ,...,A fn .

[0098] 3): Get the maximum sound amplitude A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 , get the maximum sound amplitude A fiThe corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 .

[0099] 4): When the judgment conditions are not met, the air conditioning device operates normally and the counter is reset to 0. When the judgment conditions are met, the counter accumulates counts and the air conditioning device operates normally. Repeat 1)-4). When the counter reaches the set count value, it indicates that there is a continuous high-frequency screaming noise and the active noise reduction device is turned off. At this time, the control module outputs an alarm prompt - active noise reduction device failure.

[0100] Among them, the judgment conditions are: the maximum sound amplitude A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>the sound amplitude setting value and the maximum sound amplitude value A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 )>Amplitude setting value.

[0101] This embodiment also proposes a control method for an air-conditioning device, which controls the air-conditioning device and an active noise reduction device, and identifies high-frequency noise based on the sound pressure signal collected by the microphone; when high-frequency noise is identified, the active noise reduction device is turned off, which can prevent the active noise reduction device from emitting high-frequency screaming noise, thereby reducing the risk of complaints during the application of the active noise reduction device and improving the reliability and competitiveness of the active noise reduction device.

[0102] Among them, the air-conditioning device is the above-mentioned air-conditioning device, and the active noise reduction device is the above-mentioned active noise reduction device, which will not be described in detail here.

[0103] like Figure 9 As shown, the control method of the air conditioning device includes the following steps:

[0104] S1, identifying high-frequency noise based on the sound pressure signal collected by the microphone;

[0105] S2: When high-frequency noise is detected, the active noise reduction device is turned off. An alarm indicating an active noise reduction device failure may also be output.

[0106] In some embodiments, the method for identifying high-frequency noise is: converting the sound pressure time domain signal collected by the microphone into a discrete time domain signal, converting the discrete time domain signal into a discrete frequency domain signal, obtaining the sound amplitude and maximum sound amplitude corresponding to the discrete frequency, and calculating the maximum sound amplitude minus the frequency corresponding to the maximum sound amplitude. fi Adjacent frequency X fi-1 The corresponding sound amplitude value> the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1 When the corresponding sound amplitude value is greater than the sound amplitude setting value, it is identified as high-frequency noise.

[0107] Specifically, the sound pressure time domain signal collected by the microphone 2 is converted into a discrete time domain signal, wherein the discrete time domain signal is a digital signal.

[0108] For example, the discrete time x t1 ,x t2 ,x t3 ,...,x tn ; The corresponding sound pressure amplitude at discrete time is: P t1 ,P t2 ,P t3 ,...,P tn .

[0109] Perform fast Fourier transform on discrete time domain signals to convert them into discrete frequency domain data signals.

[0110] Among them, the discrete frequency is: x f1 ,x f2 ,x f3 ,...,x fn ; The corresponding sound amplitude at discrete frequency is: A f1 ,A f2 ,A f3 ,...,A f .

[0111] Get the maximum sound amplitude A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1The corresponding sound amplitude A fi+1 .

[0112] At the maximum sound amplitude A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 >Amplitude setting value and maximum amplitude value A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 If the sound level exceeds the set value, the active noise reduction system will be turned off. At this time, an alarm will be output indicating that the active noise reduction system is faulty. If the above conditions are not met, the air conditioning system and the active noise reduction system are both operating normally.

[0113] The sound amplitude setting value is any value between 10-20dBA.

[0114] In some embodiments, the method of counting the situations that meet the conditions and identifying high-frequency noise is as follows: fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 >Amplitude setting value and maximum amplitude value A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 The system counts the number of times the sound amplitude exceeds the set value. If the count reaches the set value, it indicates that there is a continuous high-frequency squealing noise. In this case, the active noise reduction device is likely to be faulty, so the active noise reduction device is turned off. This solution can avoid the misjudgment of the active noise reduction device's occasional high-frequency squealing noise as a malfunction.

[0115] The count setting value is any value greater than 10.

[0116] In some embodiments, the count setting value is any value between 10-1000.

[0117] Specifically, 1): converting the sound pressure time domain signal collected by the microphone 2 into a discrete time domain signal, wherein the discrete time domain signal is a digital signal.

[0118] For example, the discrete time x t1 ,x t2 ,x t3 ,...,xtn ; The corresponding sound pressure amplitude at discrete time is: P t1 ,P t2 ,P t3 ,...,P tn .

[0119] 2): Perform fast Fourier transform on the discrete time domain signal to convert the discrete time domain signal into discrete frequency domain data signal.

[0120] Among them, the discrete frequency is: x f1 ,x f2 ,x f3 ,...,x fn ; The corresponding sound amplitude at discrete frequency is: A f1 ,A f2 ,A f3 ,...,A f .

[0121] 3): Get the maximum sound amplitude A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 .

[0122] 4): When the judgment conditions are not met, the air conditioning device operates normally and the counter is reset to 0. When the judgment conditions are met, the counter accumulates counts and the air conditioning device operates normally. Repeat 1)-4). When the counter reaches the set count value, it indicates that there is a continuous high-frequency screaming noise and the active noise reduction device is turned off. At this time, the control module outputs an alarm prompt - active noise reduction device failure.

[0123] Among them, the judgment conditions are: the maximum sound amplitude A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 >Amplitude setting value and maximum amplitude value A fi -With the maximum sound amplitude A fi The corresponding frequency X fiAdjacent frequency X fi+1 The corresponding sound amplitude A fi+1 >Amplitude setting value.

[0124] like Figure 10 As shown, the control method of the air conditioning device includes the following steps:

[0125] S1. Convert the sound pressure time domain signal collected by microphone 2 into a discrete time domain signal.

[0126] S2. Convert the discrete time domain signal into a discrete frequency domain data signal.

[0127] S3. Obtain the maximum sound amplitude value A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 .

[0128] S4. If the judgment condition is met, go to step S5; otherwise, go to step S8.

[0129] The judgment condition is: The judgment condition is: Maximum sound amplitude A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 >Amplitude setting value and maximum amplitude value A fi -With the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 >Amplitude setting value.

[0130] S5. Counter counts.

[0131] S6. Determine if the counter is greater than or equal to the set value. If so, proceed to step S7; otherwise, proceed to step S1.

[0132] S7. Turn off the active noise reduction device and output an alarm prompt.

[0133] S8. Clear the counter and go to step S1.

[0134] In some embodiments, in order to improve the recognition accuracy of high-frequency noise, the method for recognizing high-frequency noise is as follows: fi -Max(the frequency corresponding to the maximum sound amplitude X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>the sound amplitude setting value and the maximum sound amplitude value A fi -Max(the frequency corresponding to the maximum sound amplitude X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 )>the set value of the sound amplitude, it is recognized as high-frequency noise.

[0135] In some embodiments, the sound pressure time domain signal collected by the microphone 2 is converted into a discrete time domain signal, wherein the discrete time domain signal is a digital signal.

[0136] For example, the discrete time x t1 ,x t2 ,x t3 ,...,x tn ; The corresponding sound pressure amplitude at discrete time is: P t1 ,P t2 ,P t3 ,...,P tn .

[0137] Perform fast Fourier transform on discrete time domain signals to convert them into discrete frequency domain data signals.

[0138] Among them, the discrete frequency is: x f1 ,x f2 ,x f3 ,...,x fn ; The corresponding sound amplitude at discrete frequency is: A f1 ,A f2 ,A f3 ,...,A fn .

[0139] Get the maximum sound amplitude A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude Afi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 .

[0140] At the maximum sound amplitude A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>the sound amplitude setting value and the maximum sound amplitude value A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 ) > the set value for the sound amplitude, the active noise reduction system is turned off. At this point, the control module outputs an alarm indicating an active noise reduction system failure. If the above conditions are not met, both the air conditioning system and the active noise reduction system can operate normally.

[0141] The sound amplitude setting value is any value between 10-20dBA.

[0142] In some embodiments, the method for identifying high-frequency noise is: fi -Max(the frequency corresponding to the maximum sound amplitude X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>the sound amplitude setting value and the maximum sound amplitude value A fi -Max(the frequency corresponding to the maximum sound amplitude X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2)> the set value. If the cumulative count reaches the set value, it indicates a persistent high-frequency squealing noise. At this point, the active noise cancellation system is likely to be faulty, and the system is turned off. This solution can prevent the active noise cancellation system from accidentally emitting high-frequency squealing noise, which is not a fault.

[0143] The count setting value is any value greater than 10.

[0144] In some embodiments, the count setting value is any value between 10-1000.

[0145] Specifically, 1): converting the sound pressure time domain signal collected by the microphone 2 into a discrete time domain signal, wherein the discrete time domain signal is a digital signal.

[0146] For example, the discrete time x t1 ,x t2 ,x t3 ,...,x tn ; The corresponding sound pressure amplitude at discrete time is: P t1 ,P t2 ,P t3 ,...,P tn .

[0147] 2): Perform fast Fourier transform on the discrete time domain signal to convert the discrete time domain signal into discrete frequency domain data signal.

[0148] Among them, the discrete frequency is: x f1 ,x f2 ,x f3 ,...,x fn ; The corresponding sound amplitude at discrete frequency is: A f1 ,A f2 ,A f3 ,...,A f .

[0149] 3): Get the maximum sound amplitude A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 , get the maximum sound amplitude A fi The corresponding frequency Xfi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 .

[0150] 4): When the judgment conditions are not met, the air conditioning device operates normally and the counter is reset to 0. When the judgment conditions are met, the counter accumulates counts and the air conditioning device operates normally. Repeat 1)-4). When the counter reaches the set count value, it indicates that there is a continuous high-frequency screaming noise and the active noise reduction device is turned off. At this time, the control module outputs an alarm prompt - active noise reduction device failure.

[0151] Among them, the judgment conditions are: the maximum sound amplitude A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>the sound amplitude setting value and the maximum sound amplitude value A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 )>Amplitude setting value.

[0152] like Figure 11 As shown, the control method of the air conditioning device includes the following steps:

[0153] S1. Convert the sound pressure time domain signal collected by microphone 2 into a discrete time domain signal.

[0154] S2. Convert the discrete time domain signal into a discrete frequency domain data signal.

[0155] S3. Obtain the maximum sound amplitude value A of the discrete frequency fi =Max(A f1 ,A f2 ,...,A fn ), get the maximum sound amplitude A fi The corresponding frequency X fi , get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2, get the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 .

[0156] S4. If the judgment condition is met, go to step S5; otherwise, go to step S8.

[0157] The judgment condition is: maximum sound amplitude A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi-1 The corresponding sound amplitude A fi-1 , frequency X fi-2 The corresponding sound amplitude A fi-2 )>the sound amplitude setting value and the maximum sound amplitude value A fi -Max(with the maximum sound amplitude A fi The corresponding frequency X fi Adjacent frequency X fi+1 The corresponding sound amplitude A fi+1 , frequency X fi+2 The corresponding sound amplitude A fi+2 )>Amplitude setting value.

[0158] S5. Counter counts.

[0159] S6. Determine if the counter is greater than or equal to the set value. If so, proceed to step S7; otherwise, proceed to step S1.

[0160] S7. Turn off the active noise reduction device and output an alarm prompt.

[0161] S8. Clear the counter and go to step S1.

[0162] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An air conditioning device, comprising an air conditioning device body and an active noise reduction device located on the air conditioning device body, the active noise reduction device comprising a microphone for collecting sound pressure signals, a control module for obtaining the sound pressure signals and performing anti-phase calculation, and a speaker for emitting anti-phase sound, characterized in that: The control module is further configured to identify high-frequency noise based on the sound pressure signal collected by the microphone, and turn off the active noise reduction device when high-frequency noise is identified; The control module is further configured to convert the sound pressure time domain signal collected by the microphone into a discrete time domain signal, convert the discrete time domain signal into a discrete frequency domain signal, obtain the sound amplitude value and the maximum sound amplitude value corresponding to the discrete frequency, and calculate the value between the maximum sound amplitude value and the frequency corresponding to the maximum sound amplitude value. fi Adjacent frequency X fi-1 The corresponding sound amplitude value>the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1 When the corresponding sound amplitude value is greater than the sound amplitude setting value, the active noise reduction device is turned off.

2. The air conditioning device according to claim 1, characterized in that The air conditioning device includes a counter configured to calculate the maximum sound amplitude minus the frequency X corresponding to the maximum sound amplitude. fi Adjacent frequency X fi-1 The corresponding sound amplitude value>the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1 The control module is further configured to count the number of times the corresponding sound amplitude value is greater than the sound amplitude setting value, and the control module is further configured to turn off the active noise reduction device when the count continuously accumulates and reaches the counting setting value.

3. The air conditioning device according to claim 1, wherein The control module is further configured to: fi Adjacent frequency X fi-1 、X fi-2 The maximum value of the corresponding sound amplitude>the sound amplitude setting value and the maximum sound amplitude-the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 、X fi+2 When the corresponding maximum value of the sound amplitude is greater than the sound amplitude setting value, the active noise reduction device is turned off.

4. The air conditioning device according to claim 3, characterized in that The air conditioning device includes a counter configured to calculate the maximum sound amplitude minus the frequency X corresponding to the maximum sound amplitude. fi Adjacent frequency X fi-1 、X fi-2 The maximum value of the corresponding sound amplitude>the sound amplitude setting value and the maximum sound amplitude-the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 、X fi+2 The control module is further configured to count the number of times the maximum value of the corresponding sound amplitude is greater than the sound amplitude setting value, and the control module is further configured to turn off the active noise reduction device when the count continuously accumulates and reaches the counting setting value.

5. A method for controlling an air conditioner, wherein the air conditioner comprises an air conditioner body and an active noise reduction device located on the air conditioner body, wherein the active noise reduction device comprises a microphone for collecting a sound pressure signal, a control module for obtaining the sound pressure signal and performing an anti-phase calculation, and a speaker for emitting an anti-phase sound, wherein: The control method comprises the following steps: identifying high-frequency noise based on the sound pressure signal collected by the microphone; turning off the active noise reduction device when high-frequency noise is detected; The method for identifying high-frequency noise is as follows: converting the sound pressure time domain signal collected by the microphone into a discrete time domain signal, converting the discrete time domain signal into a discrete frequency domain signal, obtaining the sound amplitude and maximum sound amplitude corresponding to the discrete frequency, the maximum sound amplitude minus the frequency corresponding to the maximum sound amplitude x fi Adjacent frequency X fi-1 The corresponding sound amplitude value>the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1 When the corresponding sound amplitude value is greater than the sound amplitude setting value, it is identified as the high-frequency noise.

6. The control method of the air conditioner according to claim 5, characterized in that: The method for identifying high-frequency noise is: the maximum sound amplitude minus the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi-1 The corresponding sound amplitude value>the sound amplitude setting value and the maximum sound amplitude value-the frequency X corresponding to the maximum sound amplitude value fi Adjacent frequency X fi+1 The corresponding sound amplitude value is greater than the sound amplitude setting value, and the case where the count continuously accumulates and reaches the counting setting value is identified as the high-frequency noise.

7. The control method of the air conditioner according to claim 5, characterized in that: The method for identifying high-frequency noise is: at the maximum sound amplitude - the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi-1 、X fi-2 The maximum value of the corresponding sound amplitude>the sound amplitude setting value and the maximum sound amplitude-the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 、X fi+2 When the maximum value of the corresponding sound amplitude is greater than the sound amplitude setting value, it is identified as the high-frequency noise.

8. The control method of the air conditioner according to claim 7, characterized in that: The method for identifying high-frequency noise is: the maximum sound amplitude minus the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi-1 、X fi-2 The maximum value of the corresponding sound amplitude>the sound amplitude setting value and the maximum sound amplitude-the frequency X corresponding to the maximum sound amplitude fi Adjacent frequency X fi+1 、X fi+2 The control module is further configured to count the cases where the maximum value of the corresponding sound amplitude is greater than the sound amplitude setting value, and the control module is further configured to identify it as the high-frequency noise when the count continuously accumulates and reaches the counting setting value.

Images