A method for improving noise of indoor unit of air conditioner based on sound control technology

Abstract

The present invention relates to a method for improving noise of an air conditioner indoor unit based on sound control technology. After the corresponding relationship between working condition and annoyance degree and the corresponding relationship between working condition and control sound are established in advance, the upper limit A of noise annoyance degree is preset according to user needs. max Automatically perform sound control, through which the subjective annoyance of the noise of the air-conditioning indoor unit is reduced and the user comfort is improved without reducing the sound level of the noise of the air-conditioning indoor unit and at relatively low cost and system complexity.

Description

Technical Field

[0001] The present invention relates to the technical field of noise control, and in particular to a method for improving the noise of an indoor unit of an air conditioner based on sound control technology. Background Art

[0002] With the widespread use of air conditioners in today's society, air conditioners bring comfortable room temperature but also increasingly serious noise problems. Air conditioning noise is an important indicator that affects the user experience. At present, most air conditioner manufacturers control the noise of the air conditioner outdoor unit. However, the indoor unit is closer to the user, and the noise it generates cannot be ignored. At present, air conditioning noise reduction is mainly carried out from two aspects: passive control and active control. Among them, the low-frequency noise reduction effect of passive control is poor, and active control has problems such as narrow action frequency band, high cost, low popularity, and delay.

[0003] As a new type of noise control technology, sound control method is different from the above two methods. Its main purpose is not to reduce the sound level, but to change the sound characteristics by artificially adding appropriate natural sounds, music sounds, pink noise, etc., so as to improve the sound quality and reduce the annoyance of the original sound. In the sound control method, the original noise can be called the target sound, and the artificially added sound can be called the controlled sound. At present, sound control technology has a lot of theoretical and experimental research basis, and has been applied in the fields of soundscape, wind turbine noise, etc., but its application in the field of air conditioning noise control has not been reported. Studies have shown that when the A-weighted sound level is less than 60dB, the noise frequency domain and time domain characteristics can affect people's subjective annoyance response to noise more than the sound level. Sounds with lower sound levels but unbalanced spectra may also cause more serious subjective annoyance to the public; conversely, sounds with the same or even slightly higher sound levels but more balanced spectra will sound more comfortable; under normal operating conditions, the noise of air-conditioning indoor units is generally lower than 60dB, so simply taking measures to reduce its sound level may not be very effective in reducing users' subjective annoyance. The use of sound control technology can effectively improve the sound quality of air-conditioning indoor unit noise and improve users' comfort and experience; in addition, existing sound control applications are often accompanied by real-time noise collection in order to select appropriate control sounds for the collected noise, so it is necessary to add a noise collection module and configure the corresponding control and power supply structure, which will undoubtedly increase the manufacturing cost and system complexity. Summary of the invention

[0004] The problem solved by the present invention is how to automatically perform sound control according to user needs without adding noise collection equipment, thereby reducing the cost of air conditioning noise control and the complexity of sound control technology.

[0005] In order to solve the above problems, the present invention provides a method for improving the noise of an indoor unit of an air conditioner based on sound control technology, comprising:

[0006] Step 1, collecting the working noise of the air conditioner indoor unit in various working conditions, and extracting psychoacoustic parameters from the collected working noise;

[0007] Step 2: Input the psychoacoustic parameters into the psychoacoustic annoyance model to calculate the corresponding annoyance degree, and establish the corresponding relationship between the working condition and the annoyance degree;

[0008] Step 3: Superimpose different types of control sounds with the collected working noise in turn and input them into the psychoacoustic annoyance model to calculate the annoyance, select the best control sound based on the annoyance value, and establish the corresponding relationship between the working condition and the control sound;

[0009] Step 4: Based on the noise annoyance upper limit A pre-set by the user max ;

[0010] Step 5: The indoor unit of the indoor air conditioner is based on the upper limit A of the noise annoyance max Determine whether to perform sound control.

[0011] The beneficial effect of the present invention is that the present invention presets the upper limit A of the noise annoyance according to the user's needs by pre-establishing the corresponding relationship between the working condition and the annoyance degree and the corresponding relationship between the working condition and the control sound. max Automatically perform sound control, thereby reducing the cost of air conditioning noise control and the complexity of sound control technology.

[0012] Preferably, the step 5 specifically comprises:

[0013] Step 501A: When the air conditioner indoor unit is running, whether the annoyance corresponding to the current working condition of the air conditioner indoor unit is less than the preset upper limit of the noise annoyance A max If yes, then the optimal control sound is not superimposed on the current working condition; otherwise, the optimal control sound is superimposed on the current working condition.

[0014] Preferably, the step 5 specifically comprises:

[0015] Step 501B: according to the noise annoyance upper limit A pre-set by the user max and the operating conditions and annoyance of the indoor air conditioner, and then compare the noise annoyance corresponding to each operating condition and the upper limit of the noise annoyance A max By comparison, it will be less than the upper limit of noise annoyance A max The low annoyance attribute will be greater than or equal to the upper limit of noise annoyance A max The attribute of giving high annoyance degree;

[0016] Step 502B: when the indoor air conditioner is running, if the operating condition belongs to the low annoyance attribute, no sound control is performed; if the operating condition belongs to the high annoyance attribute, sound control is performed by superimposing the corresponding control sound according to the corresponding relationship between the operating condition, the annoyance and the control sound.

[0017] Preferably, the psychoacoustic parameters extracted in step 1 include cumulative percentage loudness N5, sharpness S, wow and flutter F and roughness R;

[0018] Preferably, the step 2 of calculating the annoyance degree using the psychoacoustic annoyance degree model specifically includes:

[0019]

[0020]

[0021]

[0022] Where PA is the psychoacoustic annoyance. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below.

[0024] A method for improving noise of an indoor unit of an air conditioner based on sound control technology, comprising:

[0025] Step 1: Collect the working noise of the air conditioner indoor unit in various working conditions, and extract psychoacoustic parameters from each working noise through noise analysis software; the noise analysis software in this embodiment is ArtemiS software, which belongs to the scope of the prior art and will not be described in detail here; the extracted psychoacoustic parameters include cumulative percentage loudness N5, sharpness S, jitter F and roughness R;

[0026] Step 2: Input the extracted psychoacoustic parameters into the constructed psychoacoustic annoyance model to calculate the annoyance corresponding to the working noise, wherein the calculation formula of the constructed psychoacoustic annoyance model is:

[0027]

[0028]

[0029]

[0030] Where, PA is the psychoacoustic annoyance;

[0031] The corresponding relationship between working conditions and annoyance degree is established based on the psychoacoustic annoyance degree calculation model;

[0032] Step 3: Collect different types of control sounds. The types of control sounds in this embodiment include but are not limited to natural sounds such as running water, birdsong, wind, rain, etc. at different sound levels, and artificial sounds such as pink noise and white noise. Perform the following operations on the working noises under various working conditions to select the optimal control sound:

[0033] Step 301, superimposing the working noise with the regulated sounds of different sound levels in sequence to obtain superimposed sound;

[0034] Step 302: extract psychoacoustic parameters from each working noise through noise analysis software; and input the extracted psychoacoustic parameters into a psychoacoustic annoyance model to calculate an annoyance degree;

[0035] Step 303: Filter out the control sound with the largest decrease in annoyance from step 302 as the optimal control sound; and establish a corresponding relationship between the working condition, annoyance and control sound based on the corresponding relationship between the working condition and the annoyance; the corresponding relationship between the working condition, annoyance and control sound established in this embodiment is shown in Table 1:

[0036] Working conditions 1 2 3 4 5 6 7 Annoyance <![CDATA[A1]]> <![CDATA[A2]]> <![CDATA[A3]]> <![CDATA[A4]]> <![CDATA[A5]]> <![CDATA[A6]]> <![CDATA[A7]]> Control sound <![CDATA[S1]]> <![CDATA[S2]]> <![CDATA[S3]]> <![CDATA[S4]]> <![CDATA[S5]]> <![CDATA[S6]]> <![CDATA[S7]]>

[0037] Table 1

[0038] Step 4: Based on the noise annoyance upper limit A pre-set by the user max In this embodiment, the upper limit of the noise annoyance is adjusted based on the user's personalized selection of noise sensitivity. max ;

[0039] Step 5: When the air conditioner indoor unit is running, obtain the current operating condition of the air conditioner indoor unit and the annoyance degree A corresponding to the current operating condition. 当前 ; Comparative Annoyance A 当前 Is it less than the upper limit of noise annoyance A? max If so, then the optimal control sound is not superimposed on the current working condition for sound control; otherwise, the optimal control sound is superimposed on the current working condition for sound control.

[0040] In addition, when the air conditioner indoor unit receives the switching working condition instruction, it obtains the corresponding annoyance degree A according to the working condition corresponding to the switching working condition instruction. 拟切换 and control sound S 拟切换 , if the A 拟切换 Greater than or equal to A max , then before completing the working state switching, for the S 拟切换 Be ready to call and play the corresponding control sound; and play the corresponding control sound when the working condition switching is completed; if the A 拟切换 Less than A max , then when the working state switching is completed, the control does not start the sound regulation. Specific embodiment 2

[0042] The difference between this embodiment and the specific embodiment 1 lies in step 5. Step 5 of this embodiment includes: before the indoor air conditioner is turned on, according to the user's preset adaptive noise annoyance upper limit A maxand the operating conditions and annoyance of the indoor air conditioner, and then compare the noise annoyance corresponding to each operating condition and the upper limit of the noise annoyance A max By comparison, it will be less than the upper limit of noise annoyance A max The low annoyance attribute will be greater than or equal to the upper limit of noise annoyance A max The high annoyance attribute is assigned; when the indoor air conditioner is running, if the operating condition belongs to the low annoyance attribute, no sound control is performed; if the operating condition belongs to the high annoyance attribute, sound control is performed by superimposing the corresponding control sound according to the corresponding relationship between the operating condition, annoyance and control sound.

[0043] Through sound control, the subjective annoyance of the air-conditioning indoor unit noise is reduced and the user comfort is improved without reducing the sound level of the air-conditioning indoor unit noise and at relatively low cost and system complexity.

[0044] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A method for improving noise of an air conditioner indoor unit based on sound control technology, characterized in that: include: Step 1, collecting the working noise of the air conditioner indoor unit in various working conditions, and extracting psychoacoustic parameters from the collected working noise; Step 2: Input the psychoacoustic parameters into the psychoacoustic annoyance model to calculate the corresponding annoyance degree, and establish the corresponding relationship between the working condition and the annoyance degree; Step 3: Superimpose different types of control sounds with the collected working noise in turn and input them into the psychoacoustic annoyance model to calculate the annoyance, select the best control sound based on the annoyance value, and establish the corresponding relationship between the working condition and the control sound; Step 301, superimposing the working noise with the regulated sounds of different sound levels in sequence to obtain superimposed sound; Step 302, extracting psychoacoustic parameters from each working noise by using noise analysis software; The extracted psychoacoustic parameters are input into the psychoacoustic annoyance model to calculate the annoyance degree; Step 303, selecting the control sound with the largest reduction in annoyance from step 302 as the optimal control sound; And on the basis of the corresponding relationship between the working condition and the annoyance degree, the corresponding relationship between the working condition, the annoyance degree and the control sound is established; Step 4: Based on the user's pre-set upper limit of noise annoyance ; Step 5: The air conditioner indoor unit is based on the upper limit of the noise annoyance Determine whether to perform sound control. When the indoor unit of the air conditioner receives a switching operating condition instruction, obtain the corresponding annoyance degree according to the operating condition corresponding to the switching operating condition instruction. and control sound , if the Greater than or equal to , then before completing the working state switching, for the Be prepared to call up and play the corresponding control sound; When the working condition is switched, the corresponding control sound is played; if the Less than , then when the working state switching is completed, the control does not start the sound regulation.

2. The method for improving noise of an air conditioner indoor unit based on sound control technology according to claim 1, characterized in that: The step 5 specifically includes: Step 501A: When the air conditioner indoor unit is running, whether the annoyance corresponding to the current working condition of the air conditioner indoor unit is less than the preset upper limit of the noise annoyance If yes, then the optimal control sound is not superimposed on the current working condition; otherwise, the optimal control sound is superimposed on the current working condition.

3. The method for improving noise of an air conditioner indoor unit based on sound control technology according to claim 1, characterized in that: The step 5 specifically includes: Step 501B: according to the upper limit of noise annoyance level pre-set by the user and the operating conditions and annoyance of the indoor air conditioner, and the noise annoyance and the upper limit of the noise annoyance corresponding to each operating condition are calculated in turn. By comparison, it will be less than the upper limit of noise annoyance The low annoyance attribute will be greater than or equal to the upper limit of noise annoyance The attribute of giving high annoyance degree; Step 502B: when the indoor air conditioner is running, if the operating condition belongs to the low annoyance attribute, no sound control is performed; if the operating condition belongs to the high annoyance attribute, sound control is performed by superimposing the corresponding control sound according to the corresponding relationship between the operating condition, the annoyance and the control sound.

4. The method for improving noise of an air conditioner indoor unit based on sound control technology according to claim 1, characterized in that: The psychoacoustic parameters extracted in step 1 include the cumulative percentage loudness , sharpness , Wow and Flutter and roughness .

5. The method for improving noise of an air conditioner indoor unit based on sound control technology according to claim 1, characterized in that: The step 2 of calculating the annoyance degree using the psychoacoustic annoyance degree model specifically includes: ； ； ； Where PA is the psychoacoustic annoyance.

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