An automatic shutdown control method and device of an air conditioner and the air conditioner

Abstract

The application discloses an automatic shutdown control method and device of an air conditioner and the air conditioner, and relates to the technical field of air conditioners. The automatic shutdown control method of the air conditioner comprises the following steps: timing the length of the running time of the air conditioner when the air conditioner is started, periodically detecting the noise fluctuation value in the room when the length of the running time is greater than a first preset length of time, judging whether a user in the room is in an active state based on the noise fluctuation value, controlling the air conditioner to run in an energy-saving mode if the user is not in the active state, detecting the change of the frequency of the compressor after the air conditioner runs in the energy-saving mode for a second preset length of time, and judging whether the air conditioner is controlled to automatically shut down based on the change of the frequency of the compressor. The application can accurately judge whether the air conditioner needs to be automatically shut down, avoids the problem that the air conditioner cannot be shut down when a user does not enter the room for a long time, and improves the user experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an automatic shutdown control method, device, and air conditioner for an air conditioner. Background Technology

[0002] Air conditioners typically require manual control to start and stop, or they can be set to run on a timer, automatically stopping after the set time. However, when manually controlling the air conditioner's start and stop, if the user forgets to turn it off and remains indoors for an extended period, it can lead to wasted energy. Similarly, when setting a timer, if the air conditioner automatically shuts off after the set time but the user is still indoors and unable to adapt to the indoor environment, the user needs to manually turn the air conditioner back on, reducing the user experience. Summary of the Invention

[0003] To address the aforementioned issues, this invention provides an automatic shutdown control method, device, and air conditioner that can accurately determine whether the air conditioner needs to be automatically shut off. This avoids energy waste and prevents the air conditioner from remaining on for extended periods without being turned off, thus improving the user experience.

[0004] According to an embodiment of the present invention, an automatic shutdown control method for an air conditioner is provided, comprising: timing the operating time of the air conditioner; periodically detecting indoor noise fluctuation values ​​when the operating time exceeds a first preset time; determining whether a user is active indoors based on the noise fluctuation values; if not, controlling the air conditioner to enter energy-saving mode; and after the air conditioner has been running in energy-saving mode for a second preset time, detecting changes in compressor frequency, and determining whether to control the air conditioner to automatically shut down based on the changes in compressor frequency.

[0005] By adopting the above technical solution, the system can accurately determine whether a user is indoors based on indoor noise fluctuations. When the system first detects that the user is not indoors, it controls the air conditioner to operate in energy-saving mode to reduce power consumption. This also avoids the need to turn the air conditioner back on when the user re-enters the room shortly after. After the air conditioner has been running in energy-saving mode for a period of time, the compressor frequency is checked again to determine whether anyone is indoors and whether the air conditioner needs to be automatically shut off. This avoids energy waste and prevents the air conditioner from failing to shut off when the user has not been indoors for an extended period, thus improving the user experience.

[0006] Preferably, the step of determining whether there is a user active indoors based on the noise fluctuation value includes: determining that there is a user active indoors when the noise fluctuation value is greater than a preset noise threshold.

[0007] By adopting the above technical solution, when the noise fluctuation value is large, it can be determined that there is user activity indoors, which improves the detection accuracy, reduces the detection cost, and requires less computation, thus improving the detection efficiency.

[0008] Preferably, the automatic shutdown control method further includes: when the noise fluctuation value is detected to be less than the preset noise threshold for a consecutive preset number of times, determining that no user is active in the room.

[0009] By adopting the above technical solution, when the noise fluctuation value is detected to be small in multiple consecutive tests, it is determined that there is no user activity indoors, thus achieving accurate detection of the unoccupied state of the room and providing an accurate data basis for the energy-saving operation of the air conditioner.

[0010] Preferably, the step of determining whether to control the air conditioner to automatically shut down based on the change in the compressor frequency includes: when it is detected that the compressor frequency has not changed within a third preset time period, determining that the user is not indoors, and controlling the air conditioner to automatically shut down.

[0011] By adopting the above technical solution, when the compressor frequency does not change, it is determined that no one is in the room and the air conditioner is automatically turned off. This realizes automatic shutdown when the user has not been in the room for a long time, avoids large power consumption caused by the user not returning for a long time and not turning off the air conditioner, avoids resource waste, and improves user experience.

[0012] Preferably, the automatic shutdown control method further includes: when the compressor frequency is detected to change within a third preset time period for a set number of consecutive times, determining that the user is indoors, controlling the air conditioner to exit the energy-saving mode, and resuming operation in the original mode.

[0013] By adopting the above technical solution, when the compressor frequency changes are detected multiple times in succession, it is determined that someone is in the room, and the air conditioner is controlled to switch to normal operation. This ensures that no user forgets to turn off the air conditioner during long-term operation, while meeting the user's temperature needs, ensuring the comfort of the indoor temperature, and improving the user experience.

[0014] Preferably, the step of periodically detecting the noise fluctuation value in the room includes: detecting the noise value in the room in real time, and calculating the noise fluctuation value based on the difference between the maximum and minimum values ​​of the noise value within a fifth preset time interval every fourth preset time interval.

[0015] By adopting the above technical solution, the fluctuation value of noise level over a period of time can be periodically calculated, which can detect changes in indoor noise and thus detect whether there is activity indoors, thereby achieving energy-saving control of the air conditioner.

[0016] Preferably, the automatic shutdown control method further includes: after the noise fluctuation value of the current cycle is calculated and output, clearing the noise fluctuation value of the current cycle within a sixth preset time period, so as to store the noise fluctuation value calculated in the next cycle.

[0017] By adopting the above technical solution, the noise fluctuation value of the current cycle can be cleared in a timely manner within a certain period of time. This not only allows for the determination of whether there are people in the room based on the noise fluctuation value, but also provides temporary storage space for the noise fluctuation value to be calculated in the next cycle. This avoids the error caused by too many calculated noise fluctuation values ​​and improves the reliability of the automatic shutdown control of the air conditioner.

[0018] According to an embodiment of the present invention, another aspect provides an automatic shutdown control device for an air conditioner, comprising: a detection module for timing the operating time of the air conditioner, and periodically detecting indoor noise fluctuation values ​​when the operating time exceeds a first preset duration; a control module for determining whether a user is indoors based on the noise fluctuation values, and controlling the air conditioner to enter energy-saving mode if the user is detected not to be indoors; and a judgment module for detecting changes in compressor frequency after the air conditioner has been running in energy-saving mode for a second preset duration, and determining whether to control the air conditioner to automatically shut down based on the changes in compressor frequency.

[0019] According to an embodiment of the present invention, another aspect provides an air conditioner including a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method as described in any of the first aspects.

[0020] According to an embodiment of the present invention, another aspect provides a computer-readable storage medium storing a computer program that, when read and executed by a processor, implements the method as described in any of the first aspects.

[0021] The present invention has the following beneficial effects: by determining whether a user is indoors based on indoor noise fluctuations, it can accurately determine whether there is activity indoors. By controlling the air conditioner to operate in energy-saving mode when the user is first detected not indoors, the power consumption of the air conditioner is reduced. It also avoids the need to turn on the air conditioner again when the user enters the room again in a short period of time. By detecting the compressor frequency again after the air conditioner has been running in energy-saving mode for a period of time, it can determine whether there is anyone in the room again, thereby determining whether the air conditioner needs to be automatically turned off. This avoids energy waste and the problem of the air conditioner not being able to turn off when the user has not entered the room for a long time, thus improving the user experience. Attached Figure Description

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0023] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0024] Figure 1 A flowchart of an automatic shutdown control method for an air conditioner provided by the present invention; Figure 2 This invention provides a flowchart for the shutdown control of an air conditioner. Figure 3 A schematic diagram of an automatic shutdown control device for an air conditioner provided by the present invention. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] This embodiment provides an automatic shutdown control method for an air conditioner. This method can be applied to air conditioners, see below. Figure 1 The flowchart shown is for the automatic shutdown control method of an air conditioner. The method mainly includes the following steps S102 to S106: Step S102: Time the start-up time of the air conditioner. When the start-up time exceeds the first preset time, periodically detect the noise fluctuation value in the room. When the air conditioner is turned on, the timer counts the running time of the air conditioner and determines whether the running time is greater than a first preset time. The value of the first preset time can be 3h to 5h, with a preferred value of 4h.

[0028] When the air conditioner has been running for a long time, it indicates that the air conditioner has been running for a long time. In order to prevent users from forgetting to turn off the air conditioner when they leave and thus consuming more electricity, the indoor noise level is detected in real time, and the indoor noise fluctuation value is calculated periodically based on the detected noise level, so as to make a preliminary judgment on whether there is anyone active in the room based on the indoor noise fluctuation value.

[0029] Step S104: Determine whether there are any users active indoors based on the noise fluctuation value. If not, control the air conditioner to enter energy-saving mode. When the indoor noise level fluctuates significantly, it indicates a wide range of noise fluctuations, suggesting potential human activity indoors. Conversely, when the indoor noise level fluctuates slightly, it indicates a narrow range of noise fluctuations, suggesting potential vacancy indoors. When vacancy is detected, the air conditioner enters energy-saving mode, which reduces the compressor frequency and shortens the airflow time of the indoor unit to decrease energy consumption.

[0030] Step S106: After the air conditioner has been running in energy-saving mode for a second preset period of time, detect the change in compressor frequency and determine whether to control the air conditioner to automatically shut down based on the change in compressor frequency.

[0031] The second preset duration can be between 20 minutes and 40 minutes, with 30 minutes being the preferred value. After the air conditioner has been running in energy-saving mode for a period of time, the compressor frequency is monitored in real time. Based on the changes in the compressor frequency, it is determined whether the user is indoors. If the user is indoors, there is no need to turn off the air conditioner; if the user is not indoors, the air conditioner is automatically turned off.

[0032] The automatic shutdown control method for the air conditioner provided in this embodiment can accurately determine whether there is activity indoors by judging whether the user is indoors based on the indoor noise fluctuation value. By controlling the air conditioner to operate in energy-saving mode when the user is first detected not indoors, the power consumption of the air conditioner is reduced. It can also avoid the need to turn on the air conditioner again when the user enters the room again in a short period of time. By detecting the compressor frequency again after the air conditioner has been running in energy-saving mode for a period of time, it can determine whether there is anyone in the room again, thereby determining whether the air conditioner needs to be automatically turned off. This avoids energy waste and the problem of the air conditioner not being able to turn off when the user has not entered the room for a long time, thus improving the user experience.

[0033] In one embodiment, this embodiment provides an implementation method for determining whether there is a user active indoors based on noise fluctuation values. The specific steps are as follows: Step (1): When the noise fluctuation value is greater than the preset noise threshold, it is determined that there is an active user indoors.

[0034] The preset noise threshold can range from 3 to 10 dB, with a preferred value of 5 dB. When the noise fluctuation value exceeds the preset noise threshold, it indicates a large range of indoor sound fluctuations, suggesting the presence of people indoors. By identifying indoor activity when noise fluctuations are large, detection accuracy is improved. Using only a noise detection sensor, the presence of people indoors can be accurately detected. Compared to existing technologies that use cameras or infrared sensors, this reduces detection costs and computational load, thus improving detection efficiency.

[0035] Step (2): When the noise fluctuation value is less than the preset noise threshold for a consecutive preset number of times, it is determined that no user is active indoors.

[0036] The preset number of times can range from 2 to 5 times, with 2 times being the preferred value. When the detected noise fluctuation value is less than the preset noise threshold, it indicates that the indoor sound fluctuation range is small. It is then determined whether the noise fluctuation values ​​detected multiple times consecutively are all less than the preset noise threshold. If the noise fluctuation values ​​detected multiple times consecutively are all less than the preset noise threshold, it can be determined that no user is active indoors.

[0037] By repeatedly detecting low noise fluctuations, it can be determined that there is no user activity indoors, thus achieving accurate detection of unoccupied indoor conditions and providing an accurate data basis for the energy-saving operation of air conditioners.

[0038] In one embodiment, this embodiment provides an implementation method for determining whether to control the air conditioner to automatically shut down based on changes in compressor frequency. The specific steps are as follows: Step 1): When the compressor frequency is detected to remain unchanged within the third preset time period, it is determined that the user is not indoors, and the air conditioner is automatically turned off.

[0039] When no user is detected in the room, to further improve detection accuracy, after the air conditioner runs in energy-saving mode for a period of time, it can be determined whether the compressor frequency has changed over that period. If no one is in the room, the indoor environment is stable, and the compressor frequency will not change in a short period of time. The value range of the aforementioned third preset time period can be 5~15s. By determining that no one is in the room when the compressor frequency does not change and controlling the air conditioner to automatically shut down, automatic shutdown is achieved when the user has not been in the room for a long time. This avoids excessive power consumption caused by the user not returning for a long time and leaving the air conditioner on, thus avoiding resource waste and improving the user experience.

[0040] Step 2): When the compressor frequency changes within the third preset time period after a set number of consecutive tests, the system determines that the user is indoors, controls the air conditioner to exit energy-saving mode, and resumes operation in the original mode.

[0041] If the user is indoors, human activity will cause an imbalance in the indoor load. The compressor will automatically adjust its frequency according to the load balance to achieve the target load balance of the indoor environment. When a change in compressor frequency is detected within a short period of time, and this change is detected multiple times consecutively, it is determined that someone is in the room, and the air conditioner is switched from energy-saving mode to normal mode. The value of the above-mentioned number of times can be between 2 and 4, with a preferred value of 2.

[0042] By detecting changes in compressor frequency multiple times in succession, the system determines that someone is in the room and controls the air conditioner to switch to normal operation. This ensures that no user forgets to turn off the air conditioner during long-term operation, while also meeting the user's temperature needs, ensuring a comfortable indoor temperature, and improving the user experience.

[0043] In one embodiment, this embodiment provides a specific implementation method for periodically detecting indoor noise fluctuation values: the indoor noise value is detected in real time, and the noise fluctuation value is calculated based on the difference between the maximum and minimum noise values ​​within a fifth preset time interval every fourth preset time interval.

[0044] The fourth preset duration can range from 1 to 3 minutes, with a preferred value of 2 minutes. The fifth preset duration can range from 40 to 80 seconds, with a preferred value of 60 seconds. The formula for calculating the noise fluctuation value is: B = [Max(Lx) - Min(Lx)], where Max(Lx) is the maximum noise value detected within the fifth preset duration, and Min(Lx) is the minimum noise value detected within the fifth preset duration.

[0045] By periodically calculating the fluctuation of noise levels over a period of time, changes in indoor noise can be detected, which in turn can indicate whether there is activity indoors, thus enabling energy-saving control of the air conditioner.

[0046] In one embodiment, the method provided in this embodiment further includes: after the noise fluctuation value of the current period is calculated and output, clearing the noise fluctuation value of the current period within a sixth preset time period, so as to store the noise fluctuation value calculated in the next period.

[0047] The air conditioner controller is equipped with a storage device that stores the noise fluctuation values ​​calculated in each cycle. The aforementioned sixth preset duration can range from 40 to 80 seconds, with a preferred value of 60 seconds. After calculating and outputting the noise fluctuation value for the current cycle, the noise fluctuation value for the current cycle is promptly cleared within a certain period. This allows for the determination of whether someone is indoors based on the noise fluctuation value, and also provides temporary storage space for the noise fluctuation value to be calculated in the next cycle. This avoids errors caused by too many calculated noise fluctuation values, thus improving the reliability of the air conditioner's automatic shutdown control.

[0048] The automatic shutdown control method for air conditioners provided in this embodiment can automatically shut down the air conditioner when it is determined that no one is in the room, thereby achieving energy-saving control of the air conditioner and avoiding users' concerns about whether the air conditioner is turned off when they go on a long trip, thus improving the user experience.

[0049] Corresponding to the automatic shutdown control method for air conditioners provided in the above embodiments, this embodiment of the invention provides an example of using the above-described automatic shutdown control method to control the shutdown of an air conditioner, see below. Figure 2 The air conditioner shutdown control flowchart shown below can be followed as follows: Step S201: After the air conditioner has been running for 4 hours, the indoor environment tends to stabilize, and the noise detection mode is activated. Step S202: Record the noise value detected in real time, calculate the noise fluctuation value within 1 minute, and output the noise fluctuation value B; Noise fluctuation value B = [Max(1mins:Lx) - Min(1mins:Lx)]; Max(1mins:Lx) is the maximum noise value detected within 1 minute, and Min(1mins:Lx) is the minimum noise value detected within 1 minute; Step S203: After the noise fluctuation value B is output, clear the stored noise fluctuation value within 1 minute, wait for 2 minutes, and start the next noise fluctuation value detection again. Step S204: When the noise fluctuation value B is greater than 5dB, it is determined that there is activity indoors; Step S205: When the noise fluctuation value is detected to be less than 5dB, and the noise fluctuation value is less than 5dB in 3 instances, it is preliminarily determined that there is no one in the room, and the air conditioner enters the energy-saving mode. Step S206: After running in energy-saving mode for half an hour, determine whether the compressor frequency has changed; If someone is indoors, human activity will cause an imbalance in the indoor load. The air conditioner inverter unit will automatically adjust the compressor frequency according to the load balance to achieve the target load balance of the indoor environment. If no one is indoors, the indoor environment is stable and the compressor frequency does not change.

[0050] Step S207: If the compressor frequency does not change, it is determined that no one is in the room, and a shutdown command is sent to the air conditioner; In step S208, if the compressor frequency changes and both detections show a change, it is determined that someone is in the room, and the system switches from energy-saving mode to normal mode.

[0051] Corresponding to the automatic shutdown control method for air conditioners provided in the above embodiments, this invention provides an automatic shutdown control device for air conditioners. This device can be applied to air conditioners, see below. Figure 3 The diagram shows the structure of the automatic shutdown control device for an air conditioner. This device includes the following modules: The detection module 31 is used to time the running time of the air conditioner. When the running time exceeds the first preset time, it periodically detects the noise fluctuation value in the room. Control module 32 is used to determine whether the user is indoors based on the noise fluctuation value. If the user is not indoors, the control module 32 controls the air conditioner to enter the energy-saving mode. The judgment module 33 is used to detect the change in compressor frequency after the air conditioner has been running in energy-saving mode for a second preset time, and to determine whether to control the air conditioner to automatically shut down based on the change in compressor frequency.

[0052] The automatic shutdown control device for the air conditioner provided in this embodiment can accurately determine whether there is anyone active indoors by judging whether the user is indoors based on the indoor noise fluctuation value. By controlling the air conditioner to operate in energy-saving mode when the user is first detected not indoors, the power consumption of the air conditioner is reduced. It can also avoid the need to turn on the air conditioner again when the user enters the room again in a short period of time. By detecting the compressor frequency again after the air conditioner has been running in energy-saving mode for a period of time, it can determine whether there is anyone in the room again, thereby determining whether the air conditioner needs to be automatically turned off. This avoids energy waste and the problem of the air conditioner not being able to turn off when the user has not entered the room for a long time, thus improving the user experience.

[0053] In one embodiment, the control module 32 is used to determine that a user is active indoors when the noise fluctuation value is greater than a preset noise threshold.

[0054] In one embodiment, the control module 32 is used to determine that no user is active in the room when the noise fluctuation value is detected to be less than the preset noise threshold for a consecutive preset number of times.

[0055] In one embodiment, the aforementioned determination module 33 is used to determine that the user is not indoors when the compressor frequency is detected to have not changed within a third preset time period, and to control the air conditioner to automatically shut down.

[0056] In one embodiment, the aforementioned judgment module 33 is used to determine that the user is indoors when the compressor frequency changes within a third preset time period after a set number of consecutive detections, and to control the air conditioner to exit the energy-saving mode and resume the original operating mode.

[0057] In one embodiment, the detection module 31 is used to detect indoor noise levels in real time, and calculate the noise fluctuation value based on the difference between the maximum and minimum noise values ​​within a fifth preset time interval every fourth preset time interval.

[0058] In one embodiment, the detection module 31 is used to clear the noise fluctuation value of the current period within a sixth preset time period after the noise fluctuation value of the current period is calculated and output, so as to store the noise fluctuation value calculated in the next period.

[0059] The automatic shutdown control device for the air conditioner provided in this embodiment can automatically shut down the air conditioner when it is determined that no one is in the room, thereby achieving energy-saving control of the air conditioner and avoiding users' concerns about whether the air conditioner will be turned off when they go on a long trip, thus improving the user experience.

[0060] Corresponding to the automatic shutdown control method for air conditioners provided in the above embodiments, this embodiment provides an air conditioner that includes a computer-readable storage medium storing a computer program and a processor. The computer program is read and executed by the processor to implement the automatic shutdown control method for air conditioners provided in the above embodiments.

[0061] This embodiment also provides a computer-readable storage medium storing a computer program. When executed by a processor, this computer program implements the various processes of the above-described automatic shutdown control method embodiment for an air conditioner, achieving the same technical effect. To avoid repetition, it will not be described again here. The computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, etc.

[0062] Of course, those skilled in the art will understand that all or part of the processes in the above embodiments can be implemented by computer-controlled devices. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments. The storage medium can be a memory, a disk, an optical disk, etc.

[0063] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0064] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. Regarding the automatic shutdown control device and air conditioner disclosed in the embodiments, since they correspond to the automatic shutdown control method of the air conditioner disclosed in the embodiments, the description is relatively simple, and relevant parts can be referred to the method section. The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0065] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. An automatic shutdown control method for an air conditioner, characterized in that, include: The operating time of the air conditioner is timed, and when the operating time exceeds a first preset time, the indoor noise fluctuation value is periodically detected. Based on the noise fluctuation value, determine whether the user is indoors; if not, control the air conditioner to enter energy-saving mode. After the air conditioner has been running in the energy-saving mode for a second preset period of time, the change in compressor frequency is detected, and based on the change in compressor frequency, it is determined whether to control the air conditioner to automatically shut down. The step of determining whether a user is indoors based on the noise fluctuation value includes: When the noise fluctuation value is greater than a preset noise threshold, it is determined that someone is in the room; When the noise fluctuation value is detected to be less than the preset noise threshold for a preset number of consecutive preset number of times, it is determined that there is no one in the room; The step of determining whether to automatically shut down the air conditioner based on changes in the compressor frequency includes: When it is detected that the compressor frequency has not changed within a third preset time period, it is determined that the user is not indoors, and the air conditioner is controlled to automatically turn off. When the compressor frequency is detected to change within a third preset time period for a set number of consecutive times, it is determined that the user is indoors, and the air conditioner is controlled to exit the energy-saving mode and resume the original operating mode.

2. The automatic shutdown control method as described in claim 1, characterized in that, The step of periodically detecting indoor noise fluctuations includes: The noise level in the room is detected in real time, and the noise fluctuation value is calculated every fourth preset time interval based on the difference between the maximum and minimum values ​​of the noise level within a fifth preset time interval.

3. The automatic shutdown control method as described in claim 1, characterized in that, Also includes: After the noise fluctuation value of the current period is calculated and output, the noise fluctuation value of the current period is cleared within a sixth preset time period so as to store the noise fluctuation value calculated for the next period.

4. An automatic shutdown control device for an air conditioner, characterized in that, The automatic shutdown control method according to any one of claims 1-3, wherein the automatic shutdown control device comprises: The detection module is used to time the operating time of the air conditioner. When the operating time exceeds a first preset time, it periodically detects the noise fluctuation value in the room. The control module is used to determine whether the user is indoors based on the noise fluctuation value. If the user is not indoors, the control module controls the air conditioner to enter energy-saving mode. The judgment module is used to detect the change in compressor frequency after the air conditioner has been running in the energy-saving mode for a second preset period of time, and to determine whether to control the air conditioner to automatically shut down based on the change in compressor frequency.

5. An air conditioner, characterized in that, The method includes a computer-readable storage medium storing a computer program, which is read and executed by the processor to implement the method as described in any one of claims 1-3.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that is read and executed by a processor to implement the method as described in any one of claims 1-3.

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