Air conditioner and control method and device thereof, storage medium and computer program product

Abstract

The invention provides an air conditioner, a control method and device of the air conditioner, a storage medium and a computer program product, and the method comprises the steps that when the air conditioner runs, audio data in the environment where the air conditioner is located are collected; according to the collected audio data, the contribution degree of the noise generated by the air conditioner to the total value of indoor human ear perceived environmental noise is determined; and if the contribution degree is larger than a preset value, a noise reduction mode is started, and noise reduction operation of the air conditioner is controlled. According to the scheme provided by the invention, the noise generated by the air conditioner can be distinguished from the environmental noise, and the noise reduction mode is accurately entered.

Description

Technical Field

[0001] The present invention relates to the field of control, and in particular to an air conditioner and a control method, device, storage medium and computer program product thereof. Background Art

[0002] Air conditioners are essential appliances in modern homes and offices. While providing a comfortable indoor environment, the noise they generate during operation has also drawn considerable attention. Existing air conditioner noise reduction methods primarily rely on determining the decibel level of the indoor unit and ambient noise. This has limitations in terms of effectiveness and is particularly prone to misadjustment.

[0003] In related technologies, control is generally performed based on the decibel value of sound waves. During actual use, it is impossible to distinguish between air conditioning and ambient noise, which can easily lead to miscontrol or ignore indoor comfort in order to reduce noise. Summary of the Invention

[0004] The main purpose of the present invention is to overcome the defects of the above-mentioned related technologies and provide an air conditioner and its control method, device, storage medium and computer program product to solve the problem that the air conditioner noise reduction method in the related technology cannot distinguish between air conditioning and environmental noise and is prone to miscontrol.

[0005] On one hand, the present invention provides a method for controlling an air conditioner, comprising: collecting audio data in the environment where the air conditioner is located when the air conditioner is running; determining the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data; if the contribution is greater than a preset value, entering a noise reduction mode and controlling the air conditioner to operate in noise reduction mode.

[0006] Optionally, it also includes: before collecting audio data in the environment where the air conditioner is located, determining whether the air conditioner is currently in automatic noise reduction mode; when the air conditioner is currently in automatic noise reduction mode, collecting audio data in the environment where the air conditioner is located.

[0007] Optionally, it also includes: before collecting audio data in the environment where the air conditioner is located, detecting the indoor ambient temperature in real time; when it is detected that the difference between the indoor ambient temperature and the set temperature is within a preset range, collecting audio data in the environment where the air conditioner is located.

[0008] Optionally, based on the collected audio data, the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear is determined, including: calculating the proportion of the total energy of the sound within the second preset frequency range in the collected audio data to the total energy of the sound within the first frequency range as the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear.

[0009] Optionally, controlling the noise reduction operation of the air conditioner includes: detecting the indoor ambient temperature, and determining whether the temperature difference between the indoor ambient temperature and the set temperature is less than or equal to zero; if it is determined that the temperature difference is less than or equal to zero, controlling the indoor fan set speed to reduce the preset speed value; if it is determined that the temperature difference is greater than zero, controlling the indoor fan set speed to increase the preset speed value.

[0010] Optionally, controlling the noise reduction operation of the air conditioner further includes: if it is determined that the temperature difference is less than or equal to zero, after controlling the set speed of the indoor fan to be lowered by a preset speed value, collecting audio data in the environment; determining the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data, and adjusting the set speed of the indoor fan or the target operating frequency of the compressor based on the contribution change value of the currently determined contribution relative to the contribution determined last time and the change value of the indoor ambient temperature; and / or, if it is determined that the temperature difference is greater than zero, after controlling the set speed of the indoor fan to be increased by a preset speed value, collecting audio data in the environment; calculating the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data, and adjusting the set speed of the indoor fan or the target operating frequency of the compressor based on the contribution change value of the currently determined contribution relative to the contribution determined last time.

[0011] Optionally, the indoor unit fan speed or the compressor target operating frequency is adjusted based on the contribution change value of the currently determined contribution relative to the contribution change value determined last time and the change value of the indoor ambient temperature, including: when the contribution change value is less than or equal to 0, the indoor unit fan speed is controlled to be reduced by a preset speed value based on the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan set speed is controlled to be increased or decreased by the preset speed value; and / or, when the contribution change value is greater than 0, the compressor target operating frequency is controlled based on the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan set speed is controlled to be increased or decreased by the preset speed value.

[0012] Optionally, when the contribution change value is less than or equal to 0, the indoor unit fan speed is controlled to reduce the preset speed value according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value, including: if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value is less than a first preset temperature threshold, the indoor unit fan speed is controlled to reduce the preset speed value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value is greater than a second preset temperature threshold, the indoor unit fan speed is controlled to increase the preset speed value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold. temperature threshold, then maintain the current state and continue to operate; and / or, when the contribution change value is greater than 0, control the compressor target operating frequency according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan setting speed is increased or decreased, including: if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan setting speed is increased or decreased is less than the first preset temperature threshold, then control the compressor target operating frequency to decrease the preset frequency value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan setting speed is increased or decreased is greater than the second preset temperature threshold, then control the compressor target operating frequency to increase the preset frequency value; if the change value of the indoor ambient temperature is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold, then maintain the current state and continue to operate.

[0013] Optionally, the preset frequency value is equal to the product of the change value of the contribution degree and the target operating frequency of the compressor before adjustment.

[0014] On the other hand, the present invention provides a control device for an air conditioner, comprising: an acquisition unit, for collecting audio data in the environment where the air conditioner is located when the air conditioner is running; a determination unit, for determining the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the audio data collected by the acquisition unit; and a control unit, for entering a noise reduction mode and controlling the noise reduction operation of the air conditioner if the contribution is greater than a preset value.

[0015] Optionally, it also includes: a mode determination unit, which is used to determine whether the air conditioner is currently in automatic noise reduction mode before the collection unit collects audio data in the environment where the air conditioner is located; the collection unit is further used to: collect audio data in the environment where the air conditioner is located when the mode determination unit determines that the air conditioner is currently in automatic noise reduction mode.

[0016] Optionally, it also includes: a detection unit, which is used to detect the indoor ambient temperature in real time before the collection unit collects the audio data in the environment where the air conditioner is located; the collection unit is further used to: when the detection unit detects that the difference between the indoor ambient temperature and the set temperature is within a preset range, collect the audio data in the environment where the air conditioner is located.

[0017] Optionally, the determination unit determines the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the audio data collected by the collection unit, including: calculating the proportion of the total energy of the sound within the second preset frequency range in the collected audio data to the total energy of the sound within the first frequency range as the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear.

[0018] Optionally, the control unit controls the noise reduction operation of the air conditioner, including: detecting the indoor ambient temperature, and determining whether the temperature difference between the indoor ambient temperature and the set temperature is less than or equal to zero; if it is determined that the temperature difference is less than or equal to zero, controlling the indoor fan set speed to reduce the preset speed value; if it is determined that the temperature difference is greater than zero, controlling the indoor fan set speed to increase the preset speed value.

[0019] Optionally, the control unit, which controls the noise reduction operation of the air conditioner, further includes: if it is determined that the temperature difference is less than or equal to zero, after controlling the set speed of the indoor fan to decrease by a preset speed value, collecting audio data in the environment; determining the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data, and adjusting the set speed of the indoor fan or the target operating frequency of the compressor based on the contribution change value of the currently determined contribution relative to the contribution determined last time and the change value of the indoor ambient temperature; and / or, if it is determined that the temperature difference is greater than zero, after controlling the set speed of the indoor fan to increase by a preset speed value, collecting audio data in the environment; calculating the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data, and adjusting the set speed of the indoor fan or the target operating frequency of the compressor based on the contribution change value of the currently determined contribution relative to the contribution determined last time.

[0020] Optionally, the control unit adjusts the indoor unit fan speed or the compressor target operating frequency based on the contribution change value of the currently determined contribution relative to the contribution change value determined last time and the change value of the indoor ambient temperature, including: when the contribution change value is less than or equal to 0, controlling the indoor unit fan speed to reduce the preset speed value based on the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan set speed is controlled to be increased or decreased by the preset speed value; and / or, when the contribution change value is greater than 0, controlling the compressor target operating frequency based on the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan set speed is controlled to be increased or decreased by the preset speed value.

[0021] Optionally, when the contribution change value is less than or equal to 0, the control unit controls the indoor unit fan speed to reduce the preset speed value according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value, including: if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value is less than a first preset temperature threshold, then controlling the indoor unit fan speed to reduce the preset speed value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value is greater than a second preset temperature threshold, then controlling the indoor unit fan speed to increase the preset speed value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold. temperature threshold, then maintain the current state and continue to operate; and / or, the control unit, when the contribution change value is greater than 0, controls the target operating frequency of the compressor according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan setting is increased or decreased, including: if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan setting is increased or decreased is less than the first preset temperature threshold, then control the target operating frequency of the compressor to decrease the preset frequency value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan setting is increased or decreased is greater than the second preset temperature threshold, then control the target operating frequency of the compressor to increase the preset frequency value; if the change value of the indoor ambient temperature is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold, then maintain the current state and continue to operate.

[0022] Optionally, the preset frequency value is equal to the product of the change value of the contribution degree and the target operating frequency of the compressor before adjustment.

[0023] Another aspect of the present invention provides a storage medium having a computer program stored thereon, wherein the program implements the steps of any of the aforementioned methods when executed by a processor.

[0024] In another aspect, the present invention provides an air conditioner, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the program.

[0025] In another aspect, the present invention provides an air conditioner, comprising any one of the aforementioned control devices for the air conditioner.

[0026] In another aspect, the present invention provides a computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the steps of any of the aforementioned methods are implemented.

[0027] According to the technical solution of the present invention, by collecting and calculating the proportion of fixed-frequency noise in the environment where the air conditioner is located (that is, the fixed frequency range of the noise generated by the air conditioner) in the environmental noise perceived by the human ear, the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear is determined, so that when the contribution is greater than a preset value, the noise reduction mode is entered, and noise reduction control is performed according to the temperature difference between the set temperature and the indoor ambient temperature. The noise generated by the air conditioner can be distinguished from the environmental noise, and according to the proportion of the noise generated by the air conditioner in the environmental noise perceived by the human ear, it is determined whether to enter the noise reduction mode, and whether the air conditioner noise has a greater impact on the human ear's perception of the environment, and then noise control is performed.

[0028] According to the technical solution of the present invention, the noise reduction reliability of the air-conditioning unit can be improved. When the unit is in the noise reduction mode, it can be linked with the operating parameters of the unit itself to complete the air-conditioning noise reduction without reducing the cooling effect, and realize accurate and balanced linkage control between the noise reduction effect of the indoor unit and the unit regulation, thereby effectively improving the comfort of the air-conditioning noise reduction.

[0029] The noise reduction mode in the related art cannot guarantee accurate judgment of the noise reduction conditions. According to the technical solution of the present invention, after entering the noise reduction mode, the noise reduction control can be performed according to the temperature difference between the indoor ambient temperature and the set temperature. While ensuring the indoor comfort, the fan speed can be adjusted to avoid affecting the user's comfort; after adjusting the fan speed of the indoor unit, the fan speed of the indoor unit or the compressor frequency is further adjusted according to the proportion of the noise generated by the air conditioner in the ambient noise perceived by the human ear and the size of the indoor temperature change, which can achieve effective control between noise reduction effect and temperature comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 1 is a method diagram of an embodiment of the air conditioner control method provided by the present invention;

[0032] Figure 2 1 is a schematic diagram of a specific embodiment of the air conditioner control method provided by the present invention;

[0033] Figure 3 This is a control logic diagram for the noise reduction mode;

[0034] Figure 4 This is a structural block diagram of an embodiment of the air conditioner control device provided by the present invention;

[0035] Figure 5 The figure shows a schematic flow chart of detecting sound pressure by a piezoelectric sensor according to the present invention. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and corresponding drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0038] Related technologies typically control the air conditioner's noise level based on the decibel level of the sound wave. However, in actual use, it's impossible to distinguish between the air conditioner and ambient noise, which can easily lead to misuse of the control or overlook indoor comfort in the interest of noise reduction. Extensive experimental data has shown that air conditioner components operate in a fixed manner, resulting in noise within a fixed frequency range. In indoor environments, this fixed frequency noise can be identified as being generated by the air conditioner.

[0039] Figure 1 1 is a schematic diagram of an embodiment of the air conditioner control method provided by the present invention.

[0040] like Figure 1 As shown, according to one embodiment of the present invention, the air conditioner control method includes at least step S110, step S120 and step S130.

[0041] Step S110 : When the air conditioner is running, audio data in the environment where the air conditioner is located is collected.

[0042] Preferably, before collecting audio data from the environment in which the air conditioner is located, it is first determined whether the air conditioner is currently in automatic noise reduction mode. If the air conditioner is currently in automatic noise reduction mode, the audio data from the environment in which the air conditioner is located is collected. If the air conditioner is currently in non-automatic noise reduction mode or forced noise reduction mode is not set, the unit will disable noise reduction operation and exit noise reduction mode if LFE is detected to be less than 40% at any logical node.

[0043] In a specific embodiment, the air conditioner noise reduction function may include the following modes: 1. Noise reduction function off: the user can choose to turn off the noise reduction function. When the noise reduction function is off, the noise reduction function is not executed; 2. Automatic noise reduction mode, that is, automatically turning on or off the noise reduction mode: in the automatic noise reduction mode, by judging whether the conditions for entering the noise reduction mode are met, entering the noise reduction mode or exiting the noise reduction mode; 3. Forced noise reduction mode. If in the forced noise reduction mode, the noise reduction function is always in the activated state.

[0044] Preferably, before collecting audio data from the air conditioner's environment, the indoor ambient temperature is detected in real time. When the difference between the indoor ambient temperature and the set temperature is detected to be within a preset range, audio data from the air conditioner's environment is collected. In other words, audio data from the air conditioner's environment is collected only when the indoor ambient temperature approaches the set temperature, ensuring that noise reduction control does not affect indoor comfort.

[0045] For example, after the air conditioner is turned on, if the user sets the automatic noise reduction mode, the air conditioning system operates according to the normal variable frequency cooling logic, detects the indoor ambient temperature in real time, calculates the difference ΔT between the indoor ambient temperature and the set temperature, and when -2℃≤ΔT≤2℃ is satisfied, that is, the ambient temperature is close to the set temperature, the audio data in the environment where the air conditioner is located is collected.

[0046] Specifically, audio data can be collected using an audio acquisition device (e.g., a microphone), and then processed to obtain spectrum data. For example, the collected audio data is first amplified and processed for interference prevention using a low-pass filter. A mode conversion is then performed to convert the analog signal into a digital signal. A Fourier transform (FFT) is then performed to convert the time domain signal into a frequency domain signal to obtain spectrum data. Converting the signal from the time domain to the frequency domain can display the distribution of different frequency components.

[0047] Step S120 , determining the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by human ears based on the collected audio data.

[0048] Specifically, the ratio of the total energy of the sound within the second preset frequency range in the collected audio data to the total energy of the sound within the first frequency range is calculated as the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear. That is, after processing the audio data to obtain spectrum data, the spectrum data within the first preset frequency range is extracted, and the spectrum data of the second preset frequency range is extracted from the spectrum data of the first preset frequency range. In a specific example, the following steps may be included:

[0049] 1. Collect audio data: First, use a device such as a microphone or piezoelectric sensor to collect sound signals.

[0050] 2. Fourier transform to spectrum: The time domain signal is converted into a spectrum in the frequency domain through Fourier transform.

[0051] 3. Extract the spectrum of the spectrum within a first preset frequency range (eg, 20 Hz to 5 kHz): For example, extract the range of 20 Hz to 5 kHz from the spectrum, focusing on analyzing the noise characteristics of low to medium frequencies.

[0052] 4. Further extract specific information: Further extract the required information from the extracted spectrum. For example, extract the spectrum in the range of 20 Hz to 5 kHz and calculate the low-frequency noise energy fraction (LFE).

[0053] For example, when any excitation frequency of the unit fan is f, after collecting indoor audio data, the spectrum feature data in the frequency range of 20Hz to 5kHz is extracted, and then the spectrum feature data in the frequency range of 20Hz to 1kHz is extracted from it.

[0054] The contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear is equal to the ratio of the total energy within the second preset frequency range in the collected audio data to the total energy within the first frequency range. More specifically, the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear is equal to the ratio of the integral of the sound pressure energy within the second preset frequency range to the integral of the sound pressure energy within the first frequency range in the collected audio data.

[0055] The human ear's hearing perception range is typically 20Hz to 20kHz, but this range varies depending on age, health, and environmental factors. Low frequencies (20Hz-200Hz): These are the "bass" portion of sound perception, such as a "dull hum." Mid-frequency frequencies (200Hz-5kHz): These are the primary frequency range for sound perception, allowing even slight noises to be perceived. High frequencies (5kHz-20kHz): These are the "high" portion of sound perception, such as crisp tones or high-frequency noises in the environment.

[0056] The first preset frequency range can specifically be a preset frequency range for the human ear to perceive ambient noise. For example, the range of 20 Hz to 5 kHz is the frequency range in which the human ear is most sensitive to ambient noise. The second preset frequency range can specifically be a preset frequency range for the noise generated by the air conditioner, for example, the range of 20 Hz to 1 kHz. Based on a large amount of experimental data measurement, it has been found that the operating mode of air conditioner components is fixed, and the noise has a fixed frequency range. In indoor environments, the noise in this fixed frequency range can be determined to be generated by the operation of the air conditioner.

[0057] In a specific implementation, the ratio may be represented by a low frequency noise energy ratio LFE (Low Frequency Energy, used to evaluate the impact of low frequency noise energy on the overall acoustic environment energy).

[0058] Assuming that the first preset frequency range is f0 to f1 and the second preset frequency range is f0 to f2, the LFE formula is defined as follows:

[0059]

[0060] is the integral of the sound pressure energy in the frequency band f0 to f2, is the integral of the sound pressure energy in the frequency band f0 to f1 (human ear perception in the room), Q(f) is the total energy transferred in the sound wave at the excitation frequency f, and its unit can be joule (J). It can be obtained by integrating the sound intensity I. The formula is:

[0061]

[0062] Where I is the sound intensity, P is the sound pressure, which can be detected by a piezoelectric sensor and the unit can be Pascal (Pa), and Z is the acoustic impedance, which can be Pascal seconds per cubic meter (Pa·s / m 3 ), in air, the acoustic impedance Z is a constant, for example, 415 Pa / cdotps / m³. After acquiring the spectrum, the sound pressure P is measured using a piezoelectric sensor. The sound intensity I is then integrated to determine the ratio of the f0-f2 frequency band to the f0-f1 frequency band. In other words, the numerator in the formula is the frequency range of the sound produced by the air conditioner during operation, and the denominator is the frequency range of the sound in the entire room. This can be measured in a laboratory, where the air conditioner components operate in a fixed manner and the noise has a fixed frequency range.

[0063] For example, the first preset frequency range is 20Hz~5kHz, and the second preset frequency range is 20Hz~1kHz; then

[0064]

[0065] in, is the integral of the sound pressure energy in the 20Hz-1000Hz frequency band, The sound pressure energy is integrated in the 20Hz-5000Hz frequency band. After obtaining the spectrum, the sound pressure P is obtained by combining with the piezoelectric sensor. Then the sound intensity I is integrated to obtain the ratio of the frequency distribution of 20Hz~1000Hz in 20Hz~5000Hz.

[0066] The sound pressure can be detected by a piezoelectric sensor. Specifically, the sound pressure signal is collected by the piezoelectric sensor, the signal output by the piezoelectric sensor is amplified by an amplifier, and then filtered by a bandpass filter to obtain a sound signal within a first preset frequency range and a sound pressure signal within a second preset frequency range. Figure 5 FIG. 2 shows a schematic diagram of a process for detecting sound pressure by a piezoelectric sensor according to the present invention. Figure 5As shown, to collect sound pressure using a piezoelectric sensor, a suitable piezoelectric sensor must be selected to ensure that its frequency response range covers 20 Hz to 5 kHz. The piezoelectric sensor's output signal (raw data packet) is amplified by a preamplifier and filtered using a bandpass filter 1 that only allows signals within a first preset frequency range (e.g., 20 Hz to 5 kHz) and a bandpass filter 2 that only allows signals within a second preset frequency range (e.g., 20 Hz to 1 kHz) to reduce interference from irrelevant frequencies. Before analog-to-digital conversion (ADC), an anti-aliasing filter can be used to prevent high-frequency signals from aliasing into the target frequency range. The conditioned analog signal is converted to a digital signal using an ADC for further digital signal processing. The digital signal is converted into a spectrum, for example, using a Fourier transform or other frequency domain analysis method, to extract sound pressure data for the first and second preset frequency ranges. This is used to integrate the sound intensity I and further calculate the low-frequency noise energy fraction (LFE).

[0067] Using the size of LFE as a representation can be conveniently matched with the logic loop. When judging the indoor human ear perception range, LFE is obtained by collecting the spectrum and sound pressure of the internal noise and indoor environmental noise of the unit during operation. Its calculated value facilitates the unit to adjust the internal parameters according to actual conditions, thereby improving the system accuracy and reliability.

[0068] Step S130: If the contribution is greater than a preset value, the air conditioner enters a noise reduction mode and is controlled to operate in noise reduction mode.

[0069] Specifically, if the contribution of the noise inside the air conditioner to the total value of the indoor human ear perception environment is greater than a preset threshold, for example, if the ratio of the sound pressure energy integral of the second preset frequency range to the sound pressure energy integral of the first frequency range in the collected audio data is greater than 40% (preset threshold), it means that the noise generated by the air conditioner at this time has a high contribution to the total value of the indoor human ear perception environment, that is, it switches to noise reduction mode.

[0070] In a specific embodiment, controlling the noise reduction operation of the air conditioner includes: detecting the indoor ambient temperature, and determining whether the temperature difference between the indoor ambient temperature and the set temperature is less than or equal to zero; if it is determined that the temperature difference is less than or equal to zero, controlling the indoor unit fan set speed to reduce the preset speed value; if it is determined that the temperature difference is greater than zero, controlling the indoor unit fan set speed to increase the preset speed value.

[0071] Specifically, after entering the noise reduction mode, the mode process is executed cyclically, with each cycle interval being a preset time (for example, the cycle is judged once every 180 seconds, and the shortest operating time of any fan speed is 90 seconds, ensuring that the fan speed can only be adjusted after running to a stable state). Real-time collection of indoor ambient temperature T real, calculate the indoor ambient temperature T real With the set temperature T set The temperature difference ΔT=T real -T set , determine whether ΔT is less than or equal to zero. If it is determined that ΔT≤0, the indoor fan setting speed is controlled to be reduced by a preset speed value, for example, the indoor fan speed is reduced by one gear. If it is determined that ΔT>0, the indoor fan setting speed is controlled to be increased by a preset speed value, for example, the indoor fan speed is increased by one gear.

[0072] Furthermore, after controlling the indoor fan to set the speed to lower the preset speed value, or controlling the indoor fan to set the speed to increase the preset speed value, the following steps are further included:

[0073] (1) If it is determined that the temperature difference is less than or equal to zero, after controlling the set speed of the indoor unit fan to reduce the preset speed value, collect audio data in the environment; determine the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data, and adjust the set speed of the indoor unit fan or the target operating frequency of the compressor based on the contribution change value of the currently determined contribution relative to the contribution change value determined last time (that is, the difference between the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear determined this time and the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear determined last time) and the change value of the indoor ambient temperature.

[0074] First, calculate the indoor ambient temperature T real If the temperature difference ΔT from the set temperature Tset is ≤ 0, that is, the indoor ambient temperature is less than or equal to the set temperature, the set speed of the indoor unit fan is reduced by a preset speed value, where the preset speed value is, for example, the fan speed. For example, the indoor unit fan speed is reduced by one speed. Then, the process proceeds to the next step to calculate the LFE value. The set speed of the indoor unit fan or the target operating frequency of the compressor is adjusted according to the change ΔLFE of the current LFE value relative to the previous LFE value.

[0075] According to a specific embodiment of the present invention, the indoor comfort level is first determined, that is, the fan speed is adjusted when the cooling capacity has met the indoor cooling demand to avoid causing trouble to the user. Secondly, the noise inside the air conditioner is mainly related to its fan-duct system. When the air duct, the size and number of fan blades, and the air guide plate are all finalized, its speed is the main influencing factor of the noise inside the machine. By adjusting the set fan speed, the contribution of the air conditioner to the total value of the indoor human ear perception environment is reduced.

[0076] Among them, if the temperature difference is less than a preset temperature difference threshold, the compressor of the air conditioner is controlled to stop, and the preset temperature difference threshold is less than zero. The preset temperature difference threshold can be, for example, -2°C. When the temperature difference ΔT between the indoor ambient temperature and the set temperature is less than the preset temperature difference threshold (for example, ΔT < -2°C), the cooling capacity is much greater than the heat load. In this case, considering saving power consumption, the compressor is stopped and the indoor unit keeps supplying air, which has almost no effect on the user's comfort. At the same time, in the present invention, the fan speed and the compressor frequency are in a linkage control relationship. When the compressor is stopped, the energy-saving target has been met. The completion relationship between the noise reduction and energy-saving targets can be mutually preceded and followed, and the two targets can be achieved at different times.

[0077] (2) If it is determined that the temperature difference is greater than zero, after controlling the set speed of the indoor unit fan to increase the preset speed value, collect audio data in the environment; determine the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data, and adjust the set speed of the indoor unit fan or the target operating frequency of the compressor based on the contribution change value of the currently determined contribution relative to the contribution change value determined last time (that is, the difference between the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear calculated this time and the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear calculated last time) and the change value of the indoor ambient temperature.

[0078] Specifically, if ΔT>0, that is, the indoor ambient temperature is greater than the set temperature, the set speed of the indoor unit fan is increased by a preset speed value, and the preset speed value is, for example, the fan speed. For example, the indoor unit fan speed is increased by one level, and the next step is entered to calculate the LFE value. The set speed of the indoor unit fan or the target operating frequency of the compressor is adjusted according to the change value ΔLFE of the current LFE value relative to the previous LFE value.

[0079] If ΔT>0, it indicates that the indoor ambient temperature is still high and has not reached the user's set temperature. The overall cooling capacity of the air-conditioning system is less than the heat load. Increasing the fan speed of the indoor unit can improve the heat exchange efficiency of the inner air circulation. The fan speed has a direct impact on the cooling capacity of the air-conditioning. However, increasing the wind speed will increase the noise of the air-conditioning system, especially the high-frequency part of the spectrum. Therefore, it is necessary to calculate the LFE value to judge the contribution. The compressor performs fuzzy adjustment based on the LFE value feedback.

[0080] In the above step (1) or (2), adjusting the indoor unit fan speed or the compressor target operating frequency according to the contribution change value of the currently determined contribution relative to the contribution change value determined last time and the change value of the indoor ambient temperature may specifically include the following situations:

[0081] (1) When the contribution change value is less than or equal to 0, the indoor fan speed is controlled to decrease by the preset speed value according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor fan speed is controlled to increase or decrease by the preset speed value.

[0082] Specifically, if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan is increased or decreased (i.e., the change value of the indoor ambient temperature) is less than a first preset temperature threshold, the indoor fan speed is controlled to decrease by the preset speed value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan is increased or decreased is greater than a second preset temperature threshold, the indoor fan speed is controlled to increase by the preset speed value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the preset speed value of the indoor fan is increased or decreased is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold, the current state is maintained and operation continues. Preferably, the first preset temperature threshold is less than 0, and the second preset temperature threshold is greater than 0.

[0083] More specifically, each time the indoor unit speed changes, it directly causes a change in the fan excitation frequency. At this point, the unit recollects audio data and calculates LFE, generating a corresponding difference ΔLFE between the two acquisitions. If ΔLFE ≤ 0, the trend of the air conditioner's contribution to the total value of the indoor human ear's perception of the environment is decreasing. Further determination is made of the change in indoor ambient temperature ΔT after increasing or decreasing the indoor unit fan speed. real size.

[0084] For example, the first preset temperature threshold is -0.5°C, and the second preset temperature threshold is 0.5°C. If the indoor ambient temperature changes by ΔT real >0.5℃ (the second preset temperature threshold), that is, at this time, the indoor ambient temperature fluctuation exceeds 0.5℃, and the overall cooling capacity of the air-conditioning system is slightly lower than the heat load, resulting in indoor temperature fluctuation. real With the set temperature T setWhen the temperature difference ΔT is greater than the preset temperature difference threshold, and the indoor fan speed is set to a lower preset speed value (for example, in the previous step, ΔT ≥ -2°C and the indoor unit is reduced by one gear), there is a probability that the positive temperature fluctuation will be affected. Here, a fuzzy judgment is made on the indoor temperature fluctuation, that is, the reduction in fan speed is related to its fluctuation, but ΔLFE ≤ 0, that is, the trend of the contribution of the air conditioner to the total value of the indoor human ear perception environment is reflected as a decrease. The contribution of the total value of the indoor human ear perception environment is small and the trend of change is reflected as a decrease. The fan speed can be adjusted back to the original speed, but it will not affect the indoor cooling comfort. This situation may explain the speculation that the overall total value of the indoor side is increasing, that is, the denominator and numerator in the core formula appear to have a much greater increase in the denominator than the numerator in the formula. Second, if the indoor unit windshield is increased by one gear in the previous link, the probability of affecting the room temperature fluctuation is more negative. If ΔT real <-0.5℃, the room temperature fluctuation is negative and exceeds 0.5℃, that is, the overall cooling capacity of the air conditioning system is slightly higher than the heat load, resulting in room temperature fluctuations. It is judged that the fan speed can be further reduced to improve the noise reduction effect, so that the room can achieve better noise reduction effect and save power consumption while meeting the comfort requirements. If -0.5℃≤ΔT real ≤0.5℃. The room temperature fluctuation is within the fluctuation range. The overall cooling capacity of the air-conditioning system meets the heat load and the fluctuation is small. It is judged that the room has met the comfort level. The LFE change trend is reflected in a decrease. The noise reduction effect has reached an acceptable range, that is, the operation is maintained.

[0085] (2) When the contribution change is greater than 0, the target operating frequency of the compressor is controlled according to the change in the current indoor ambient temperature relative to the indoor ambient temperature before the speed of the indoor fan is increased or decreased by the preset speed value.

[0086] Specifically, if a change in the current indoor ambient temperature relative to the indoor ambient temperature before the set speed of the indoor unit fan is increased or decreased by a preset speed value (hereinafter referred to as the change in the indoor ambient temperature) is less than a first preset temperature threshold, the target operating frequency of the compressor is controlled to be reduced by a preset frequency value; if a change in the current indoor ambient temperature relative to the indoor ambient temperature before the set speed of the indoor unit fan is increased or decreased by a preset speed value is greater than a second preset temperature threshold, the target operating frequency of the compressor is controlled to be increased by a preset frequency value; if the change in the indoor ambient temperature is greater than the first preset temperature threshold and less than the second preset temperature threshold, the current state is maintained and operation is continued; wherein the preset frequency value is equal to the product of the change in the contribution degree and the target operating frequency of the compressor before adjustment, that is, if the change in the indoor ambient temperature is less than the first preset temperature threshold, the adjusted target operating frequency of the compressor is: fnew=fold-ΔLFE*fold; if the change in the indoor ambient temperature is greater than the second preset temperature threshold, the adjusted target operating frequency of the compressor is: fnew=fold+ΔLFE*fold; wherein ΔLFE is the change in the contribution degree, fold is the target operating frequency of the compressor before adjustment, and fnew is the target operating frequency of the compressor after adjustment.

[0087] More specifically, if ΔLFE > 0, indicating an increasing contribution of the air conditioner to the overall perceived indoor environment, the relationship between the fan excitation frequency and sound pressure energy is not completely linear, but rather a positive correlation between sound wave frequency and decibel level. When the excitation frequency shifts to the low-frequency portion of the sound wave, the sound wave vibrations tend to cause resonance between the air duct and the housing, resulting in a muffled sound characterized by a low, high sound pressure energy that easily penetrates the housing. When the excitation frequency shifts to the mid-frequency portion of the sound wave, this range primarily represents the air conditioner's primary sound wave frequency, and the air conditioning noise contribution to the environment is concentrated there. Within this frequency range, air conditioning noise may also be mixed with mid- and low-frequency noise. When the excitation frequency shifts to the high-frequency portion of the sound wave, the significantly increased frequency leads to a positive correlation with the decibel level, resulting in a significant increase in the decibel level. This sound wave intensity better reflects the complex relationship between frequency and decibel level, so using sound pressure energy as the judgment basis offers greater accuracy.

[0088] For example, the first preset temperature threshold is -0.5°C, and the second preset temperature threshold is 0.5°C. If the change value of the indoor ambient temperature is ΔT real>0.5℃, that is, the indoor ambient temperature fluctuation exceeds 0.5℃ at this time, and the overall cooling capacity of the air-conditioning system is slightly lower than the heat load, resulting in indoor temperature fluctuations. The fuzzy judgment here is related to the reduction of the fan speed in the previous node, but the ΔLFE>0 trend is reflected as an increase. It can be judged that the compressor should be fuzzy controlled without changing the fan excitation frequency, and the compressor target operating frequency should be adjusted proportionally. The cooling capacity compensation is performed according to the formula: fnew=fold+ΔLFE*fold, so that the compressor can be adjusted without changing the indoor noise comfort. If ΔT real <-0.5℃, where the room temperature fluctuation is negative by more than 0.5℃, that is, the overall cooling capacity of the air conditioning system is reduced, resulting in negative room temperature fluctuations. It is judged that the compressor frequency can be reduced while maintaining the indoor noise comfort. The specific formula can be fnew=fold-ΔLFE*fold, so as to improve the energy saving effect while meeting the user's room cooling comfort. If -0.5℃≤ΔT real ≤0.5℃, the room temperature fluctuation here is in line with the preset fluctuation range, the overall cooling capacity of the air-conditioning system meets the heat load and the fluctuation is small. It is judged that the room has met the comfort level, the room temperature fluctuation is maintained within the range, and the next cycle judgment is entered.

[0089] To clearly illustrate the technical solution of the present invention, the execution process of the air conditioner control method provided by the present invention is described below with reference to a specific embodiment.

[0090] Figure 2 FIG. 1 is a schematic diagram of a specific embodiment of the air conditioning control method provided by the present invention. Figure 2 As shown, after the air conditioner is turned on, if the user sets the automatic noise reduction mode, the system operates according to the normal variable frequency cooling logic, and calculates the difference ΔT between the ambient temperature and the set temperature in real time. When the ambient temperature approaches the set temperature (-2℃≤ΔT≤2℃), the LFE value is detected and calculated. Based on the calculated LFE value, the unit enters or exits the noise reduction mode. If the LFE is ≥40%, the unit enters the noise reduction mode, otherwise it exits. If the unit is in non-automatic noise reduction mode, or the user does not set the forced noise reduction mode, the unit operates according to the noise reduction shutdown mode. At the same time, if the LFE is detected at any logic node <40%, the unit exits the noise reduction mode.

[0091] Figure 3 Figure 2 is a control logic diagram for the noise reduction mode. Figure 3 As shown, after entering the noise reduction mode, the noise reduction process is executed cyclically (for example, the judgment is repeated every 180 seconds, and the shortest running time of the fan at any speed is 90 seconds). The parameters of each judgment condition are collected and calculated in real time, such as ΔT, ΔT real , LFE, compressor frequency f (not fan excitation frequency), but only the value in the current cycle is used for logic judgment in each cycle. In one process:

[0092] First, calculate the indoor ambient temperature T real With the set temperature T set The temperature difference ΔT=T real -T set , determine whether ΔT is less than or equal to zero. If ΔT≤0, that is, the indoor ambient temperature is less than or equal to the set temperature, the indoor unit air speed (set indoor unit fan speed) is reduced by one level, and the process proceeds to the next step to calculate the LFE value. Further determine whether ΔT<-2℃ is satisfied. If so, the compressor stops and the process returns to the starting stage of the mode. If ΔT>0, that is, the ambient temperature is greater than the set temperature, the indoor unit air speed (set indoor unit fan speed) is increased by one level, and the process proceeds to the next step to calculate the LFE value.

[0093] After lowering or raising the indoor fan speed, calculate the LEF value, and calculate the change value relative to the last calculated LEF value to obtain ΔLFE, that is, the difference ΔLFE of the current calculated LEF value minus the last calculated LEF value. If ΔLFE≤0, the change trend of the air conditioner's contribution to the total value of the indoor human ear perception environment is reflected as a decrease. Further judge the size of the change value ΔTreal of the indoor ambient temperature after raising or lowering the indoor fan speed. If ΔTreal>0.5℃, the fan speed can be adjusted back to the original speed. If ΔT real <-0.5℃, the noise reduction effect can be improved by further reducing the fan speed. If -0.5℃≤ΔT real ≤0.5℃, it is judged that the room has met the comfort level, the LFE change trend is reflected in the decrease, the noise reduction effect has reached the acceptable range, and the operation is maintained. If ΔLFE>0, the change trend of the air conditioner's contribution to the total value of the indoor human ear perception environment is reflected in the increase, and if ΔT real >0.5℃, that is, the indoor ambient temperature fluctuation exceeds 0.5℃, the compressor target operating frequency is updated to fnew=fold+ΔLFE*fold, if ΔT real <-0.5℃, the compressor target operating frequency is updated to fnew=fold-ΔLFE*fold, in order to improve the energy saving effect while meeting the cooling comfort of the user's room. real ≤0.5℃, the room temperature fluctuation here is within the fluctuation range, the overall cooling capacity of the air-conditioning system meets the heat load and the fluctuation is small. It is judged that the room has met the comfort level, maintains the room temperature fluctuation within the range, and enters the next cycle judgment.

[0094] The invention also provides a control device for an air conditioner.

[0095] Figure 4 FIG. 1 is a structural block diagram of an embodiment of the air conditioner control device provided by the present invention. Figure 4As shown, the control device 100 includes: a collection unit 110 , a determination unit 120 and a control unit 130 .

[0096] The collecting unit 110 is configured to collect audio data in the environment where the air conditioner is located when the air conditioner is in operation.

[0097] Preferably, the device 100 further includes a mode determination unit (not shown) configured to determine whether the air conditioner is currently in automatic noise reduction mode before the collection unit 110 collects audio data from the air conditioner's environment. The collection unit 110 is further configured to collect audio data from the air conditioner's environment if the mode determination unit determines that the air conditioner is currently in automatic noise reduction mode. If the air conditioner is not currently in automatic noise reduction mode or forced noise reduction mode is not set, the unit disables noise reduction operation and exits noise reduction mode if LFE is detected to be less than 40% at any logical node.

[0098] In a specific embodiment, the air conditioner noise reduction function may include the following modes: 1. Noise reduction function off: the user can choose to turn off the noise reduction function. When the noise reduction function is off, the noise reduction function is not executed; 2. Automatic noise reduction mode, that is, automatically turning on or off the noise reduction mode: in the automatic noise reduction mode, by judging whether the conditions for entering the noise reduction mode are met, entering the noise reduction mode or exiting the noise reduction mode; 3. Forced noise reduction mode. If in the forced noise reduction mode, the noise reduction function is always in the activated state.

[0099] Preferably, the device 100 further includes a detection unit (not shown) configured to detect the indoor ambient temperature in real time before the collection unit 110 collects audio data from the air conditioner's environment. The collection unit 110 is further configured to collect audio data from the air conditioner's environment when the detection unit detects that the difference between the indoor ambient temperature and the set temperature is within a preset range. In other words, audio data from the air conditioner's environment is not collected until the indoor ambient temperature approaches the set temperature, ensuring that noise reduction control does not affect indoor comfort.

[0100] For example, after the air conditioner is turned on, if the user sets the automatic noise reduction mode, the air conditioning system operates according to the normal variable frequency cooling logic, detects the indoor ambient temperature in real time, calculates the difference ΔT between the indoor ambient temperature and the set temperature, and when -2℃≤ΔT≤2℃ is satisfied, that is, the ambient temperature is close to the set temperature, the audio data in the environment where the air conditioner is located is collected.

[0101] Specifically, the acquisition unit can acquire audio data through an audio acquisition device (e.g., a microphone), and then process the acquired audio data to obtain spectrum data. For example, the acquired audio data is first amplified and subjected to interference prevention processing through a low-pass filter. A mode conversion is then performed to convert the analog signal into a digital signal. A Fourier transform (FFT) is then performed to convert the time domain signal into a frequency domain signal to obtain spectrum data. Converting the signal from the time domain to the frequency domain can display the distribution of different frequency components.

[0102] The determining unit 120 is configured to determine, based on the audio data collected by the collecting unit, a contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by human ears.

[0103] Specifically, the ratio of the total energy of the sound within the second preset frequency range in the collected audio data to the total energy of the sound within the first frequency range is calculated as the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear. That is, after processing the audio data to obtain spectrum data, the spectrum data within the first preset frequency range is extracted, and the spectrum data of the second preset frequency range is extracted from the spectrum data of the first preset frequency range. In a specific example, the following steps may be included:

[0104] 1. Collect audio data: First, use a device such as a microphone or piezoelectric sensor to collect sound signals.

[0105] 2. Fourier transform to spectrum: The time domain signal is converted into a spectrum in the frequency domain through Fourier transform.

[0106] 3. Extract the spectrum of the spectrum within a first preset frequency range (eg, 20 Hz to 5 kHz): For example, extract the range of 20 Hz to 5 kHz from the spectrum, focusing on analyzing the noise characteristics of low to medium frequencies.

[0107] 4. Further extract specific information: Further extract the required information from the extracted spectrum. For example, extract the spectrum in the range of 20 Hz to 5 kHz and calculate the low-frequency noise energy fraction (LFE).

[0108] For example, when any excitation frequency of the unit fan is f, after collecting indoor audio data, the spectrum feature data in the frequency range of 20Hz to 5kHz is extracted, and then the spectrum feature data in the frequency range of 20Hz to 1kHz is extracted from it.

[0109] The contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear is equal to the ratio of the total energy within the second preset frequency range in the collected audio data to the total energy within the first frequency range. More specifically, the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear is equal to the ratio of the integral of the sound pressure energy within the second preset frequency range to the integral of the sound pressure energy within the first frequency range in the collected audio data.

[0110] The first preset frequency range can specifically be a preset frequency range for the human ear to perceive ambient noise. For example, the range of 20 Hz to 5 kHz is the frequency range in which the human ear is most sensitive to ambient noise. The second preset frequency range can specifically be a preset frequency range for the noise generated by the air conditioner, for example, the range of 20 Hz to 1 kHz. Based on a large amount of experimental data measurement, it has been found that the operating mode of air conditioner components is fixed, and the noise has a fixed frequency range. In indoor environments, the noise in this fixed frequency range can be determined to be generated by the operation of the air conditioner.

[0111] In a specific implementation, the ratio may be represented by a low frequency noise energy ratio LFE (Low Frequency Energy, used to evaluate the impact of low frequency noise energy on the overall acoustic environment energy).

[0112] Assuming that the first preset frequency range is f0 to f1 and the second preset frequency range is f0 to f2, the LFE formula is defined as follows:

[0113]

[0114] is the integral of the sound pressure energy in the frequency band f0 to f2, is the integral of the sound pressure energy in the frequency band f0 to f1 (human ear perception in the room), Q(f) is the total energy transferred in the sound wave at the excitation frequency f, and its unit can be joule (J). It can be obtained by integrating the sound intensity I. The formula is:

[0115]

[0116] Where I is the sound intensity, P is the sound pressure, which can be detected by a piezoelectric sensor and the unit can be Pascal (Pa), and Z is the acoustic impedance, which can be Pascal seconds per cubic meter (Pa·s / m 3), in air, the acoustic impedance Z is a constant, for example, 415 Pa / cdotps / m³. After acquiring the spectrum, the sound pressure P is measured using a piezoelectric sensor. The sound intensity I is then integrated to determine the ratio of the f0-f2 frequency band to the f0-f1 frequency band. In other words, the numerator in the formula is the frequency range of the sound produced by the air conditioner during operation, and the denominator is the frequency range of the sound in the entire room. This can be measured in a laboratory, where the air conditioner components operate in a fixed manner and the noise has a fixed frequency range.

[0117] For example, the first preset frequency range is 20Hz~5kHz, and the second preset frequency range is 20Hz~1kHz; then

[0118]

[0119] in, is the integral of the sound pressure energy in the 20Hz-1000Hz frequency band, The sound pressure energy is integrated in the 20Hz-5000Hz frequency band. After obtaining the spectrum, the sound pressure P is obtained by combining with the piezoelectric sensor. Then the sound intensity I is integrated to obtain the ratio of the frequency distribution of 20Hz~1000Hz in 20Hz~5000Hz.

[0120] The sound pressure can be detected by a piezoelectric sensor. Specifically, the sound pressure signal is collected by the piezoelectric sensor, the signal output by the piezoelectric sensor is amplified by an amplifier, and then filtered by a bandpass filter to obtain a sound signal within a first preset frequency range and a sound pressure signal within a second preset frequency range. Figure 5 FIG. 2 shows a schematic diagram of a process for detecting sound pressure by a piezoelectric sensor according to the present invention. Figure 5 As shown, to collect sound pressure using a piezoelectric sensor, a suitable piezoelectric sensor must be selected to ensure that its frequency response range covers 20 Hz to 5 kHz. The piezoelectric sensor's output signal (raw data packet) is amplified by a preamplifier and filtered using a bandpass filter 1 that only allows signals within a first preset frequency range (e.g., 20 Hz to 5 kHz) and a bandpass filter 2 that only allows signals within a second preset frequency range (e.g., 20 Hz to 1 kHz) to reduce interference from irrelevant frequencies. Before analog-to-digital conversion (ADC), an anti-aliasing filter can be used to prevent high-frequency signals from aliasing into the target frequency range. The conditioned analog signal is converted to a digital signal using an ADC for further digital signal processing. The digital signal is converted into a spectrum, for example, using a Fourier transform or other frequency domain analysis method, to extract sound pressure data for the first and second preset frequency ranges. This is used to integrate the sound intensity I and further calculate the low-frequency noise energy fraction (LFE).

[0121] Using the size of LFE as a representation can be conveniently matched with the logic loop. When judging the indoor human ear perception range, LFE is obtained by collecting the spectrum and sound pressure of the internal noise and indoor environmental noise of the unit during operation. Its calculated value facilitates the unit to adjust the internal parameters according to actual conditions, thereby improving the system accuracy and reliability.

[0122] The control unit 130 is configured to enter a noise reduction mode and control the air conditioner to operate in noise reduction mode if the contribution is greater than a preset value.

[0123] Specifically, if the contribution of the noise inside the air conditioner to the total value of the indoor human ear perception environment is greater than a preset threshold, for example, if the ratio of the sound pressure energy integral of the second preset frequency range to the sound pressure energy integral of the first frequency range in the collected audio data is greater than 40% (preset threshold), it means that the noise generated by the air conditioner at this time has a high contribution to the total value of the indoor human ear perception environment, that is, it switches to noise reduction mode.

[0124] In a specific embodiment, the control unit 130 controls the noise reduction operation of the air conditioner, including: detecting the indoor ambient temperature, and determining whether the temperature difference between the indoor ambient temperature and the set temperature is less than or equal to zero; if it is determined that the temperature difference is less than or equal to zero, then controlling the indoor fan set speed to reduce the preset speed value; if it is determined that the temperature difference is greater than zero, then controlling the indoor fan set speed to increase the preset speed value.

[0125] Specifically, after entering the noise reduction mode, the mode process is executed cyclically, with each cycle interval being a preset time (for example, the cycle is judged once every 180 seconds, and the shortest operating time of any fan speed is 90 seconds, ensuring that the fan speed can only be adjusted after running to a stable state). Real-time collection of indoor ambient temperature T real , calculate the indoor ambient temperature T real With the set temperature T set The temperature difference ΔT=T real -T set , determine whether ΔT is less than or equal to zero. If it is determined that ΔT≤0, the indoor fan setting speed is controlled to be reduced by a preset speed value, for example, the indoor fan speed is reduced by one gear. If it is determined that ΔT>0, the indoor fan setting speed is controlled to be reduced by a preset speed value, for example, the indoor fan speed is increased by one gear.

[0126] Furthermore, after controlling the indoor fan to set the speed to lower the preset speed value, or controlling the indoor fan to set the speed to increase the preset speed value, the following steps are further included:

[0127] (1) If it is determined that the temperature difference is less than or equal to zero, after controlling the set speed of the indoor unit fan to reduce the preset speed value, collect audio data in the environment; determine the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data, and adjust the set speed of the indoor unit fan or the target operating frequency of the compressor based on the contribution change value of the currently determined contribution relative to the contribution change value determined last time (that is, the difference between the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear determined this time and the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear determined last time) and the change value of the indoor ambient temperature.

[0128] First, calculate the indoor ambient temperature T real With the set temperature T set If ΔT≤0, that is, the indoor ambient temperature is less than or equal to the set temperature, the set speed of the indoor fan is reduced by a preset speed value, where the preset speed value is, for example, the fan speed. For example, the indoor fan speed is reduced by one speed. Then, the process proceeds to the next step of calculating the LFE value and adjusting the set speed of the indoor fan or the target operating frequency of the compressor according to the change ΔLFE of the current LFE value relative to the previous LFE value.

[0129] According to a specific embodiment of the present invention, the indoor comfort level is first determined, that is, the fan speed is adjusted when the cooling capacity has met the indoor cooling demand to avoid causing trouble to the user. Secondly, the noise inside the air conditioner is mainly related to its fan-duct system. When the air duct, the size and number of fan blades, and the air guide plate are all finalized, its speed is the main influencing factor of the noise inside the machine. By adjusting the set fan speed, the contribution of the air conditioner to the total value of the indoor human ear perception environment is reduced.

[0130] Among them, if the temperature difference is less than a preset temperature difference threshold, the compressor of the air conditioner is controlled to stop, and the preset temperature difference threshold is less than zero. The preset temperature difference threshold can be, for example, -2°C. When the temperature difference ΔT between the indoor ambient temperature and the set temperature is less than the preset temperature difference threshold (for example, ΔT < -2°C), the cooling capacity is much greater than the heat load. In this case, considering saving power consumption, the compressor is stopped and the indoor unit keeps supplying air, which has almost no effect on the user's comfort. At the same time, in the present invention, the fan speed and the compressor frequency are in a linkage control relationship. When the compressor is stopped, the energy-saving target has been met. The completion relationship between the noise reduction and energy-saving targets can be mutually preceded and followed, and the two targets can be achieved at different times.

[0131] (2) If it is determined that the temperature difference is greater than zero, after controlling the set speed of the indoor unit fan to increase the preset speed value, collect audio data in the environment; determine the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear based on the collected audio data, and adjust the set speed of the indoor unit fan or the target operating frequency of the compressor based on the contribution change value of the currently determined contribution relative to the contribution change value determined last time (that is, the difference between the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear calculated this time and the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear calculated last time) and the change value of the indoor ambient temperature.

[0132] Specifically, if ΔT>0, that is, the indoor ambient temperature is greater than the set temperature, the set speed of the indoor unit fan is increased by a preset speed value, and the preset speed value is, for example, the fan speed. For example, the indoor unit fan speed is increased by one level, and the next step is entered to calculate the LFE value. The set speed of the indoor unit fan or the target operating frequency of the compressor is adjusted according to the change value ΔLFE of the current LFE value relative to the previous LFE value.

[0133] If ΔT>0, it indicates that the indoor ambient temperature is still high and has not reached the user's set temperature. The overall cooling capacity of the air-conditioning system is less than the heat load. Increasing the fan speed of the indoor unit can improve the heat exchange efficiency of the inner air circulation. The fan speed has a direct impact on the cooling capacity of the air-conditioning. However, increasing the wind speed will increase the noise of the air-conditioning system, especially the high-frequency part of the spectrum. Therefore, it is necessary to calculate the LFE value to judge the contribution. The compressor performs fuzzy adjustment based on the LFE value feedback.

[0134] In the above step (1) or (2), adjusting the indoor unit fan speed or the compressor target operating frequency according to the contribution change value of the currently determined contribution relative to the contribution change value determined last time and the change value of the indoor ambient temperature may specifically include the following situations:

[0135] (1) When the contribution change value is less than or equal to 0, the indoor fan speed is controlled to decrease by the preset speed value according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor fan speed is controlled to increase or decrease by the preset speed value.

[0136] Specifically, if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value (i.e., the change value of the indoor ambient temperature) is less than the first preset temperature threshold, the indoor unit fan speed is controlled to decrease the preset speed value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value is greater than the second preset temperature threshold, the indoor unit fan speed is controlled to increase the preset speed value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the indoor unit fan setting speed is increased or decreased by the preset speed value is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold, the current state is maintained and operation continues.

[0137] More specifically, each time the indoor unit speed changes, it directly causes a change in the fan excitation frequency. At this point, the unit recollects audio data and calculates LFE, generating a corresponding difference ΔLFE between the two acquisitions. If ΔLFE ≤ 0, the trend of the air conditioner's contribution to the total value of the indoor human ear's perception of the environment is decreasing. Further determination is made of the change in indoor ambient temperature ΔT after increasing or decreasing the indoor unit fan speed. real For example, the first preset temperature threshold is -0.5°C and the second preset temperature threshold is 0.5°C. If the indoor ambient temperature change value ΔT real >0.5℃ (the second preset temperature threshold), that is, at this time, the indoor ambient temperature fluctuation exceeds 0.5℃, and the overall cooling capacity of the air-conditioning system is slightly lower than the heat load, resulting in indoor temperature fluctuation. set and indoor ambient temperature T real When the temperature difference ΔT is greater than the preset temperature difference threshold, and the indoor fan speed is set to a lower preset speed value (for example, in the previous step, ΔT ≥ -2°C and the indoor unit is reduced by one gear), there is a probability that the positive value of the temperature fluctuation will be affected. Here, a fuzzy judgment is made on the indoor temperature fluctuation, that is, the reduction in fan speed is related to its fluctuation, but ΔLFE ≤ 0, that is, the trend of the contribution of the air conditioner to the total value of the indoor human ear perception environment is reflected as a decrease. The contribution of the total value of the indoor human ear perception environment is small and the trend of change is reflected as a decrease. The fan speed can be adjusted back to the original speed, but it will not affect the indoor cooling comfort. This situation may explain the speculation that the overall total value of the indoor side is increasing, that is, the denominator and numerator in the core formula appear to have a much greater increase in the denominator than the numerator in the formula. Second, if the indoor unit windshield is increased by one gear in the previous link, the probability of affecting the room temperature fluctuation is more negative. Further, if ΔT real<-0.5℃, the room temperature fluctuation is negative and exceeds 0.5℃, that is, the overall cooling capacity of the air conditioning system is slightly higher than the heat load, resulting in room temperature fluctuations. It is judged that the fan speed can be further reduced to improve the noise reduction effect, so that the room can achieve better noise reduction effect and save power consumption while meeting the comfort level. Further, if -0.5℃≤ΔT real ≤0.5℃. The room temperature fluctuation is within the fluctuation range. The overall cooling capacity of the air-conditioning system meets the heat load and the fluctuation is small. It is judged that the room has met the comfort level. The LFE change trend is reflected in a decrease. The noise reduction effect has reached an acceptable range, that is, the operation is maintained.

[0138] (2) When the contribution change is greater than 0, the target operating frequency of the compressor is controlled according to the change in the current indoor ambient temperature relative to the indoor ambient temperature before the speed of the indoor fan is increased or decreased by the preset speed value.

[0139] Specifically, if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the set speed of the indoor unit fan is increased or decreased by the preset speed value (hereinafter referred to as the change value of the indoor ambient temperature) is less than a first preset temperature threshold, the target operating frequency of the compressor is controlled to be reduced by the preset frequency value; if the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the set speed of the indoor unit fan is increased or decreased by the preset speed value is greater than a second preset temperature threshold, the target operating frequency of the compressor is controlled to be increased by the preset frequency value; if the change value of the indoor ambient temperature is greater than the first preset temperature threshold and less than the second preset temperature threshold, the current state is maintained and the operation is continued;

[0140] Among them, the preset frequency value is equal to the product of the change value of the contribution degree and the target operating frequency of the compressor before adjustment, that is, if the change value of the indoor ambient temperature is less than the first preset temperature threshold, the adjusted target operating frequency of the compressor is: fnew = fold-ΔLFE*fold; if the change value of the indoor ambient temperature is greater than the second preset temperature threshold, the adjusted target operating frequency of the compressor is: fnew = fold+ΔLFE*fold; among them, ΔLFE is the change value of the contribution degree, fold is the target operating frequency of the compressor before adjustment, and fnew is the target operating frequency of the compressor after adjustment.

[0141] More specifically, if ΔLFE > 0, indicating an increasing contribution of the air conditioner to the overall perceived indoor environment, the relationship between the fan excitation frequency and sound pressure energy is not completely linear, but rather a positive correlation between sound wave frequency and decibel level. When the excitation frequency shifts to the low-frequency portion of the sound wave, the sound wave vibrations tend to cause resonance between the air duct and the housing, resulting in a muffled sound characterized by a low, high sound pressure energy that easily penetrates the housing. When the excitation frequency shifts to the mid-frequency portion of the sound wave, this range primarily represents the air conditioner's primary sound wave frequency, and the air conditioning noise contribution to the environment is concentrated there. Within this frequency range, air conditioning noise may also be mixed with mid- and low-frequency noise. When the excitation frequency shifts to the high-frequency portion of the sound wave, the significantly increased frequency leads to a positive correlation with the decibel level, resulting in a significant increase in the decibel level. This sound wave intensity better reflects the complex relationship between frequency and decibel level, so using sound pressure energy as the judgment basis offers greater accuracy.

[0142] If the change in indoor ambient temperature ΔT real >0.5℃, that is, the indoor ambient temperature fluctuation exceeds 0.5℃ at this time, and the overall cooling capacity of the air-conditioning system is slightly lower than the heat load, resulting in indoor temperature fluctuations. The fuzzy judgment here is related to the reduction of the fan speed in the previous node, but the ΔLFE>0 trend is reflected as an increase. It can be judged that the compressor should be fuzzy controlled without changing the fan excitation frequency. The compressor target operating frequency is adjusted proportionally, and the cooling capacity compensation is performed according to the formula: fnew=fold+ΔLFE*fold, so that the compressor can be adjusted without changing the indoor noise comfort. Further, if ΔT real <-0.5℃, where the room temperature fluctuation is negative by more than 0.5℃, that is, the overall cooling capacity of the air conditioning system is reduced, resulting in the room temperature fluctuation being negative. It is judged that the compressor frequency can be reduced while maintaining the indoor noise comfort. The specific formula can be fnew=fold-ΔLFE*fold, so as to improve the energy saving effect while meeting the user's room cooling comfort. Further, if -0.5℃≤ΔT real ≤0.5℃, the room temperature fluctuation here is in line with the preset fluctuation range, the overall cooling capacity of the air-conditioning system meets the heat load and the fluctuation is small. It is judged that the room has met the comfort level, the room temperature fluctuation is maintained within the range, and the next cycle judgment is entered.

[0143] The present invention also provides a storage medium corresponding to the air conditioner control method, on which a computer program is stored. When the computer program is executed by a processor, the steps of any of the above methods are implemented.

[0144] The present invention also provides an air conditioner corresponding to the air conditioner control method, comprising a processor, a memory, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of any of the aforementioned methods when executing the computer program.

[0145] The present invention also provides an air conditioner corresponding to the control device of the air conditioner, comprising any of the aforementioned control devices of the air conditioner.

[0146] The present invention also provides a computer program product corresponding to the air conditioner control method, comprising a computer program, which implements the steps of any of the aforementioned methods when executed by a processor.

[0147] Based on this, the solution provided by the present invention determines the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear by collecting and calculating the proportion of the noise of a fixed frequency band in the environment where the air conditioner is located (that is, the fixed frequency range of the noise generated by the air conditioner) in the environmental noise perceived by the human ear, and thus enters the noise reduction mode when the contribution is greater than a preset value, and performs noise reduction control according to the size of the temperature difference between the set temperature and the indoor ambient temperature. It can distinguish the noise generated by the air conditioner from the environmental noise, and determine whether to enter the noise reduction mode according to the proportion of the noise generated by the air conditioner in the environmental noise perceived by the human ear, accurately judge whether the air conditioner noise has a greater impact on the human ear's perception of the environment, and then perform noise control.

[0148] According to the technical solution of the present invention, after entering the noise reduction mode, the noise reduction control can be performed according to the temperature difference between the indoor ambient temperature and the set temperature. While ensuring the indoor comfort, the fan speed can be adjusted to avoid affecting the comfort of the user; after adjusting the speed of the indoor fan, the speed of the indoor fan or the compressor frequency is further adjusted according to the proportion of the noise generated by the air conditioner in the ambient noise perceived by the human ear and the size of the indoor temperature change, which can achieve effective control between the noise reduction effect and temperature comfort.

[0149] According to the technical solution of the present invention, the noise reduction reliability of the air-conditioning unit can be improved. When the unit is in the noise reduction mode, it can be linked with the operating parameters of the unit itself to complete the air-conditioning noise reduction without reducing the cooling effect, and realize accurate and balanced linkage control between the noise reduction effect of the indoor unit and the unit regulation, thereby effectively improving the comfort of the air-conditioning noise reduction.

[0150] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwiring, or a combination of any of these. Furthermore, each functional unit may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0151] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only exemplary. For example, the division of the units can be a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0152] The units described as separate components may or may not be physically separate, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed across multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0153] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the relevant technology, or all or 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 and includes several instructions for enabling a computer device (which can be a personal computer, server or network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk, etc. Various media that can store program codes.

[0154] The foregoing description is merely an embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of the claims.

Claims

1. A method for controlling an air conditioner, characterized in that: include: When the air conditioner is running, collecting audio data in the environment where the air conditioner is located; Determining, based on the collected audio data, the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear; If the contribution is greater than a preset value, the air conditioner enters a noise reduction mode and is controlled to operate in noise reduction mode.

2. The method according to claim 1, characterized in that Also includes: Before collecting audio data in the environment where the air conditioner is located, determining whether the air conditioner is currently in an automatic noise reduction mode; When the air conditioner is currently in an automatic noise reduction mode, audio data in an environment where the air conditioner is located is collected.

3. The method according to claim 1 or 2, characterized in that Also includes: Before collecting audio data in the environment where the air conditioner is located, detecting the indoor ambient temperature in real time; When it is detected that the difference between the indoor ambient temperature and the set temperature is within a preset range, audio data in the environment where the air conditioner is located is collected.

4. The method according to claim 1 or 2, characterized in that Determining, based on the collected audio data, the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear, including: The proportion of the total energy of the sound within the second preset frequency range in the collected audio data to the total energy of the sound within the first frequency range is calculated as the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear.

5. The method according to claim 1 or 2, characterized in that Controlling the noise reduction operation of the air conditioner includes: Detect the indoor ambient temperature and determine whether the temperature difference between the indoor ambient temperature and the set temperature is less than or equal to zero; If it is determined that the temperature difference is less than or equal to zero, the fan speed of the indoor unit is controlled to be lowered to a preset speed value; If it is determined that the temperature difference is greater than zero, the speed setting of the indoor fan is controlled to increase the preset speed value.

6. The method according to claim 5, characterized in that Controlling the noise reduction operation of the air conditioner also includes: If it is determined that the temperature difference is less than or equal to zero, after controlling the set speed of the indoor unit fan to decrease by a preset speed value, audio data in the environment is collected; determining, based on the collected audio data, the contribution of the noise generated by the air conditioner to the total value of the indoor ambient noise perceived by the human ear, and adjusting the set speed of the indoor unit fan or the target operating frequency of the compressor based on a change in the currently determined contribution relative to the last determined contribution and a change in the indoor ambient temperature; and / or, If it is determined that the temperature difference is greater than zero, after controlling the set speed of the indoor unit fan to increase the preset speed value, audio data in the environment is collected; based on the collected audio data, the contribution of the noise generated by the air conditioner to the total value of the indoor environmental noise perceived by the human ear is calculated, and according to the contribution change value of the currently determined contribution relative to the last determined contribution, the set speed of the indoor unit fan or the target operating frequency of the compressor is adjusted.

7. The method according to claim 6, characterized in that Adjusting the fan speed of the indoor unit or the target operating frequency of the compressor according to a change value of the currently determined contribution relative to the last determined contribution and a change value of the indoor ambient temperature includes: When the contribution change value is less than or equal to 0, the speed of the indoor fan is controlled to be reduced by the preset speed value according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the speed of the indoor fan is controlled to be increased or decreased by the preset speed value; and / or, When the contribution change value is greater than 0, the target operating frequency of the compressor is controlled according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the set speed of the indoor fan is increased or decreased by the preset speed value.

8. The method according to claim 7, characterized in that When the contribution change value is less than or equal to 0, controlling the indoor unit fan speed to reduce the preset speed value according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the set speed of the indoor unit fan is increased or decreased by the preset speed value includes: If the change in the current indoor ambient temperature relative to the indoor ambient temperature before the indoor fan speed is increased or decreased by the preset speed value is less than the first preset temperature threshold, the indoor fan speed is controlled to decrease by the preset speed value; If the change in the current indoor ambient temperature relative to the indoor ambient temperature before the indoor fan speed is increased or decreased by the preset speed value is greater than the second preset temperature threshold, the indoor fan speed is increased by the preset speed value; If the change in the current indoor ambient temperature relative to the indoor ambient temperature before the fan speed of the indoor unit is increased or decreased by the preset speed value is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold, the current state is maintained and the operation continues; and / or, When the contribution change value is greater than 0, controlling the target operating frequency of the compressor according to the change value of the current indoor ambient temperature relative to the indoor ambient temperature before the set speed of the indoor fan is increased or decreased by the preset speed value includes: If the change in the current indoor ambient temperature relative to the indoor ambient temperature before the indoor fan speed is increased or decreased by the preset speed value is less than the first preset temperature threshold, the target operating frequency of the compressor is controlled to be decreased by the preset frequency value; If the change in the current indoor ambient temperature relative to the indoor ambient temperature before the indoor fan speed is increased or decreased by the preset speed value is greater than the second preset temperature threshold, the target operating frequency of the compressor is controlled to increase by the preset frequency value; If the change value of the indoor ambient temperature is greater than or equal to the first preset temperature threshold and less than or equal to the second preset temperature threshold, the current state is maintained and the operation is continued.

9. The method according to claim 8, characterized in that The preset frequency value is equal to the product of the change value of the contribution and the target operating frequency of the compressor before adjustment.

10. A control device for an air conditioner, characterized in that: include: A collection unit, configured to collect audio data in an environment where the air conditioner is located when the air conditioner is in operation; a determining unit, configured to determine, based on the audio data collected by the collecting unit, a contribution of the noise generated by the air conditioner to a total value of the indoor ambient noise perceived by a human ear; The control unit is configured to enter a noise reduction mode and control the air conditioner to operate in noise reduction mode if the contribution degree is greater than a preset value.

11. A storage medium, characterized in that: A computer program is stored thereon, and when the program is executed by a processor, the steps of the method according to any one of claims 1 to 9 are implemented.

12. An air conditioner, characterized in that: The air conditioner includes a processor, a memory, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the steps of any method described in claims 1-9 are implemented, or the air conditioner includes the control device described in claim 10.

13. A computer program product, characterized in that The invention comprises a computer program, which implements the steps of the method according to any one of claims 1 to 9 when the computer program is executed by a processor.

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