Method and device for controlling air conditioner, air conditioner, and storage medium

Abstract

The present application relates to the field of smart home appliance technology and discloses a method for controlling an air conditioner, comprising: detecting the number of compressor frequency fluctuations within a first time period T1. If the number of compressor frequency fluctuations is greater than or equal to a threshold number, analyzing the current state of the heat exchanger based on the air conditioner's usage time. If the heat exchanger is attenuated, the compressor frequency is reduced; and / or, if the heat exchanger is improperly installed or used, an instruction is output to prompt after-sales maintenance. This method can reduce fluctuations in the compressor frequency during operation and improve the stability of the air conditioner system. The present application also discloses a device for controlling an air conditioner, an air conditioner, and a storage medium.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method, device, air conditioner, and storage medium for controlling an air conditioner. Background Art

[0002] As the use time increases, the air conditioner heat exchanger will become dirty, corroded, and aged, resulting in varying degrees of attenuation of the heat exchange effect. When the heat exchange effect decays to a certain extent, the original compressor frequency parameters no longer match it, causing the compressor frequency to fluctuate greatly during operation. It is necessary to reduce the fluctuation of the compressor frequency during operation and improve the stability of the air conditioner operation system.

[0003] To reduce compressor frequency fluctuations during operation, a related art discloses a compressor frequency control method: This method uses a high-pressure frequency limiting function to detect periodic frequency fluctuations. By predicting the high pressure trend, the system predicts impending high pressure and implements frequency limiting and reduction protection to stabilize the frequency. This method solves the frequency fluctuation problem caused by pressure detection lag, ensuring stable air conditioner operation and user comfort.

[0004] During the implementation of the disclosed embodiments, we discovered that the related art has at least the following issues: While the related art can ensure stable operation of the air conditioner under normal operating conditions, after the heat exchanger has been used for a certain period of time and the heat exchange effect has decayed to a certain extent, the compressor frequency adjusted using the related art still cannot meet the requirements of the decay state. The compressor frequency still frequently fluctuates during operation, affecting the stability of the air conditioner system. Summary of the Invention

[0005] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0006] Embodiments of the present disclosure provide a method and apparatus for controlling an air conditioner, an air conditioner, and a storage medium to reduce fluctuations in compressor frequency during operation and improve the stability of the air conditioner system.

[0007] In some embodiments, the method includes: detecting the number of fluctuations in the compressor frequency within a first time period T1; when the number of fluctuations in the compressor frequency is greater than or equal to a threshold number, analyzing the current state of the heat exchanger based on the usage time of the air conditioner; when the heat exchanger attenuates, reducing the compressor frequency; and / or, when the heat exchanger is improperly installed or used, outputting an instruction to prompt after-sales maintenance.

[0008] In the above embodiment, the heat exchanger's condition is analyzed by compressor frequency fluctuations. If the heat exchanger experiences attenuation, the compressor frequency can be reduced to match the adjusted compressor frequency with the attenuated state of the heat exchanger. This reduces compressor frequency fluctuations during operation. If the heat exchanger is improperly installed or used, an output instruction prompts after-sales maintenance, allowing the heat exchanger to be promptly adjusted to optimal operating conditions, thereby reducing compressor frequency fluctuations during operation.

[0009] Optionally, the current state of the heat exchanger is analyzed based on the usage time of the air conditioner, including: when the usage time of the air conditioner is greater than or equal to the second time length T2, determining that the heat exchanger has attenuated; when the usage time of the air conditioner is less than the third time length T3, determining that the heat exchanger is improperly installed or used; wherein T3≤T2.

[0010] Optionally, reducing the compressor frequency includes: lowering the operating frequency of the compressor according to a set frequency reduction value.

[0011] Optionally, reducing the compressor frequency includes: lowering the operating frequency of the compressor according to the number of fluctuations of the compressor frequency.

[0012] Optionally, the operating frequency of the compressor is lowered according to the number of fluctuations of the compressor frequency, including: determining a frequency reduction value according to the number of fluctuations of the compressor frequency; lowering the operating frequency of the compressor according to the determined frequency reduction value; wherein the number of fluctuations of the compressor frequency is positively correlated with the frequency reduction value of the compressor frequency.

[0013] Optionally, determining the frequency reduction value according to the number of fluctuations of the compressor frequency includes: determining the frequency reduction value corresponding to the number of fluctuations of the compressor frequency according to a preset corresponding relationship.

[0014] Optionally, detecting the number of fluctuations of the compressor frequency within the first time length T1 includes: detecting the change of the operating frequency of the compressor within a set frequency range within the first time length T1; counting the cases where the operating frequency change is greater than or equal to the fluctuation threshold, and obtaining the number of fluctuations of the compressor frequency.

[0015] Optionally, the method further includes: when the number of fluctuations of the compressor frequency is less than a threshold number, the air-conditioning system continues to operate.

[0016] In some embodiments, the device includes: a detection module for detecting the number of fluctuations in the compressor frequency within a first time period T1; an analysis module for analyzing the current state of the heat exchanger based on the usage time of the air conditioner when the number of fluctuations in the compressor frequency is greater than or equal to a threshold number; and a control module for reducing the compressor frequency or outputting instructions to prompt after-sales maintenance.

[0017] In some embodiments, the apparatus includes: a processor and a memory storing program instructions, wherein the processor is configured to execute the above-mentioned method for controlling an air conditioner when running the program instructions.

[0018] In some embodiments, the air conditioner includes a compressor and a heat exchanger, and also includes the above-mentioned device for controlling the air conditioner.

[0019] In some embodiments, the storage medium includes: program instructions stored therein, and when the program instructions are run, the method for controlling the air conditioner as described above is executed.

[0020] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0022] Figure 1 Shows a schematic structural diagram of an air conditioner;

[0023] Figure 2 is a schematic diagram of a method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0024] Figure 3 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0025] Figure 4 is a schematic diagram of another method for controlling an air conditioner provided by an embodiment of the present disclosure;

[0026] Figure 5 is a schematic diagram of a device for controlling an air conditioner provided by an embodiment of the present disclosure;

[0027] Figure 6 2 is a schematic diagram of another device for controlling an air conditioner provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0028] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0029] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0030] Unless otherwise stated, the term "plurality" means two or more.

[0031] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0032] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0033] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0034] In some application scenarios, the air conditioner heat exchanger may become dirty, corroded, or aged. When the heat exchange effect decays to a certain extent, the original compressor frequency parameters no longer match it, causing large fluctuations in the compressor frequency during operation and unstable operation of the air conditioning system. Related technologies use the periodic fluctuations in the frequency of the compressor to control the frequency limiting function of the high-pressure pressure change trend. By judging the change trend, it predicts the impending high pressure in advance and performs frequency limiting protection in time to stabilize the frequency and enable the air conditioner to operate smoothly under normal working conditions. However, after the air conditioner heat exchanger decays to a certain extent, the compressor frequency adjusted by the relevant technology still cannot meet the needs of the heat exchanger in the decay state. The compressor frequency still fluctuates frequently during operation, affecting the stability of the air conditioner system.

[0035] like Figure 1As shown, an air conditioner typically includes a refrigeration cycle. The refrigeration cycle includes a compressor 11, an outdoor heat exchanger 12, a throttling device 13, an indoor heat exchanger 14, and a four-way valve 15. The air conditioner also includes an electronic control device (not shown) that controls the operation of the refrigeration cycle. The electronic control device includes a processor and a detection device. The detection device is used to detect the number of fluctuations in the compressor frequency, and the processor is used to receive signals transmitted by the detection device and adjust the throttling device 13 and other electronic control components to achieve various functions of the air conditioner.

[0036] Combine Figure 2 As shown, the embodiment of the present disclosure provides a method for controlling an air conditioner, comprising:

[0037] S201 , the detection device detects the number of fluctuations of the compressor frequency within a first time period T1 .

[0038] The detection device can be a separate detection component or a detection device within the air conditioner itself. Optionally, the detection device can be a frequency detection device or a power detection device. When the frequency detection device is used, the processor is connected to the frequency detection device by signal connection, and a preset fluctuation threshold for the compressor operating frequency is set. When the actual operating frequency of the compressor exceeds the fluctuation threshold, the number of fluctuations is counted as one, and the obtained number of compressor frequency fluctuations is transmitted to the processor as a signal. Similarly, the frequency detection device transmits the number of compressor frequency fluctuations obtained within a first time period T1 to the processor. When the power detection device is used, the power detection device is connected to the air conditioner circuit to detect the current and voltage values ​​of the compressor system. Based on the current and voltage values, the change in the compressor operating frequency within a set frequency range is calculated. Cases where the actual operating frequency change is greater than or equal to the fluctuation threshold are counted, and the power detection device transmits the calculated number of compressor frequency fluctuations within the first time period T1 to the processor. The more appropriate detection device can be selected for different air conditioner models based on actual needs, providing greater flexibility and practicality.

[0039] During the detection process, the outdoor unit's air inlet temperature significantly affects the compressor's raw frequency when it varies across temperature ranges. However, within the same temperature range, the compressor's raw frequency exhibits little fluctuation. For example, when the outdoor unit's air inlet temperature is between 35°C and 43°C, regardless of other factors, the compressor's operating frequency exhibits little fluctuation. However, when the outdoor unit's air inlet temperature falls within two different temperature ranges, even if all other factors remain the same, the actual compressor's raw frequency varies. Therefore, the outdoor unit's air inlet temperature should be collected and the compressor frequency variation detected within the same preset temperature range. Alternatively, the outdoor unit's air inlet temperature can be measured in preset temperature ranges, and frequency variations within the preset temperature range can be collected to determine the number of compressor frequency fluctuations. More specifically, the preset temperature range is 35°C to 43°C. Within the preset temperature range, the compressor's raw frequency parameter tends to be stable, allowing for clearer detection of compressor frequency fluctuations. This allows for more accurate determination of the compressor frequency fluctuations, minimizing errors, and improving detection efficiency and convenience.

[0040] S202: When the number of fluctuations of the compressor frequency is greater than or equal to a threshold number, the processor analyzes the current state of the indoor heat exchanger or the outdoor heat exchanger according to the usage time of the air conditioner.

[0041] The frequency threshold is open-ended and can be any positive integer greater than or equal to 1. It can be set based on actual circumstances. More specifically, the frequency threshold is greater than or equal to 3. When the frequency threshold for compressor frequency fluctuations is less than 3, the measured frequency of fluctuations is incidental and can be assumed to be within the acceptable error range. When the frequency of compressor frequency fluctuations is greater than or equal to 3, the measured data is more accurate, allowing for more precise analysis of the current status of the indoor or outdoor heat exchanger based on the air conditioner's usage time.

[0042] The unit of the air conditioner usage time is not limited and can be years, months or days. However, in actual applications, a relatively obvious difference will generally appear after one year of use of an indoor heat exchanger or an outdoor heat exchanger. Optionally, the unit of the air conditioner usage time is years.

[0043] S203: If the indoor heat exchanger or the outdoor heat exchanger is attenuated, the processor reduces the compressor frequency. And / or if the indoor heat exchanger or the outdoor heat exchanger is improperly installed or used, the processor outputs an instruction to prompt after-sales maintenance.

[0044] When the number of fluctuations in the compressor frequency is greater than or equal to the threshold, the usage time of the air conditioner is introduced for judgment. When the usage time of the air conditioner is greater than or equal to the preset usage time, it is determined that the indoor heat exchanger or the outdoor heat exchanger has attenuated. At this time, the compressor frequency needs to be reduced so that the compressor frequency matches the attenuated state of the indoor heat exchanger or the outdoor heat exchanger to reduce the fluctuation of the compressor frequency during operation.

[0045] When the number of fluctuations in the compressor frequency is greater than or equal to the threshold, the usage time of the air conditioner is introduced for judgment. When the usage time of the air conditioner is less than the preset usage time, it is determined that the indoor heat exchanger or outdoor heat exchanger is improperly installed or used, and an instruction is output to prompt after-sales maintenance to adjust the indoor heat exchanger or outdoor heat exchanger to the optimal working state in time, thereby reducing the fluctuation of the compressor frequency during operation.

[0046] In the above embodiment, the condition of the indoor or outdoor heat exchanger is analyzed by analyzing compressor frequency fluctuations. If the indoor or outdoor heat exchanger experiences attenuation, the compressor frequency is reduced to match the adjusted compressor frequency with the attenuated condition of the indoor or outdoor heat exchanger. This reduces compressor frequency fluctuations during operation. If the indoor or outdoor heat exchanger is improperly installed or used, an output instruction prompts after-sales maintenance, allowing the indoor or outdoor heat exchanger to be promptly adjusted to optimal operating condition, thereby reducing compressor frequency fluctuations during operation.

[0047] Optionally, the processor analyzing the current state of the indoor heat exchanger or the outdoor heat exchanger based on the usage time of the air conditioner includes: if the usage time of the air conditioner is greater than or equal to a second time period T2, the processor determining that the indoor heat exchanger or the outdoor heat exchanger has degraded. If the usage time of the air conditioner is less than a third time period T3, the processor determining that the indoor heat exchanger or the outdoor heat exchanger is improperly installed or used. Wherein, T3 ≤ T2.

[0048] Among them, the second time length T2 and the third time length T3 are the years of use of the air conditioner, and the second time length T2 and the third time length T3 are not limited and can be set according to the model of the indoor heat exchanger or outdoor heat exchanger of the air conditioner. More specifically, T2 is greater than or equal to 5 years; T3 is less than 4 years. For example: when the number of fluctuations in the compressor frequency is greater than or equal to 3, the use time of the air conditioner is greater than or equal to 5 years, it is judged that the indoor heat exchanger or the outdoor heat exchanger has attenuated, and the compressor needs to be optimized. When the number of fluctuations in the compressor frequency is greater than or equal to 3, the use time of the air conditioner is less than 4 years, it is judged that the indoor heat exchanger or the outdoor heat exchanger is improperly installed or used, and after-sales maintenance is required.

[0049] Optionally, the processor reducing the compressor frequency includes: the processor lowering the operating frequency of the compressor according to a set frequency reduction value.

[0050] The set frequency reduction value is greater than or equal to 2 Hz and less than or equal to 20 Hz. When the compressor frequency needs to be reduced, the processor issues a command to the air conditioner's backend system via the network to modify the compressor frequency parameters, thereby lowering the compressor's operating frequency. This method simplifies the control logic, reduces complexity, and lowers costs.

[0051] Optionally, the processor reducing the compressor frequency includes: the processor lowering the operating frequency of the compressor according to the number of fluctuations of the compressor frequency.

[0052] Based on the compressor frequency fluctuations obtained above, the processor issues a command to the air conditioner's backend system via the network to modify the compressor frequency parameters, thereby lowering the compressor's operating frequency. This makes the compressor frequency reduction value more reasonable and helps reduce compressor frequency fluctuations during operation.

[0053] Optionally, the processor lowering the operating frequency of the compressor based on the number of compressor frequency fluctuations includes: the processor determining a frequency reduction value based on the number of compressor frequency fluctuations. The processor lowers the operating frequency of the compressor according to the determined frequency reduction value. The number of compressor frequency fluctuations is positively correlated with the frequency reduction value of the compressor frequency.

[0054] The greater the number of fluctuations in the compressor frequency, the greater the frequency reduction value of the compressor frequency. In this way, the number of times the compressor frequency is lowered can be reduced, and the efficiency of matching the adjusted compressor frequency with the attenuated state of the indoor heat exchanger or the outdoor heat exchanger can be improved.

[0055] Optionally, the processor determining the frequency reduction value according to the number of fluctuations of the compressor frequency includes: the processor determining the frequency reduction value corresponding to the number of fluctuations of the compressor frequency according to a preset corresponding relationship.

[0056] More specifically, Table 1 shows an optional correspondence between the number of fluctuations of the compressor frequency and the frequency reduction value.

[0057] Table 1

[0058] Number of compressor frequency fluctuations (C) Frequency reduction value (F) 3≤C＜5 4 5≤C＜7 5 7≤C＜9 6 9≤C＜11 7 11≤C＜13 8 13≤C＜15 9 C≥15 10

[0059] Optionally, the detecting device detecting the number of fluctuations in the compressor frequency within the first time period T1 includes: within the first time period T1, the detecting device detecting changes in the operating frequency of the compressor within a set frequency range; and counting instances where the operating frequency change is greater than or equal to a fluctuation threshold to obtain the number of fluctuations in the compressor frequency.

[0060] Among them, the first duration T1 is not limited and can be set according to the actual outdoor ambient temperature or the manually controlled operating temperature. The whole or part of the duration corresponding to the same preset temperature section is selected as the first duration T1. However, in order to ensure that the corresponding number of fluctuations of the compressor frequency is detected within the T1 duration, optionally, under the same preset temperature section, the first duration T1 is greater than or equal to 2h and less than or equal to 10h. In this way, it can be ensured that the effective number of fluctuations of the compressor frequency is detected within the first duration T1, avoiding the situation where the compressor frequency does not fluctuate in a short time, and can improve the detection efficiency and save time. More specifically, the values ​​of the first duration T1 are: 2h, 3h, 4h, 5h, 6h, 7h, 8h, 9h, 10h.

[0061] More specifically, the frequency range is set to be greater than or equal to 30 Hz and less than or equal to 120 Hz. The changes in the compressor operating frequency are detected within this set frequency range, and the cases where the operating frequency changes are greater than or equal to the fluctuation threshold are counted as the number of fluctuations of the compressor frequency, which is used together with the usage time of the air conditioner to determine the status of the indoor heat exchanger or the outdoor heat exchanger.

[0062] More specifically, the fluctuation threshold is greater than or equal to 5 Hz. When the fluctuation threshold is less than 5 Hz, it indicates that the compressor frequency fluctuation amplitude is small and, by default, within the allowable error range. Therefore, setting the fluctuation threshold to greater than or equal to 5 Hz makes the detection results more accurate.

[0063] Optionally, the method further includes: when the number of fluctuations of the compressor frequency is less than a threshold number, the processor controls the air conditioning system to continue operating.

[0064] When the number of fluctuations in the compressor frequency is less than the threshold, the fluctuation is accidental and is within the allowable error range by default. At this time, the number of fluctuations in the compressor frequency is within the normal range, and the compressor can continue to operate within the existing frequency range.

[0065] Combine Figure 3 As shown, the embodiment of the present disclosure provides another method for controlling an air conditioner, comprising:

[0066] S301 , the detection device detects the number of fluctuations of the compressor frequency within a first time period T1 .

[0067] S302: When the number of fluctuations of the compressor frequency is less than the threshold, the processor controls the air-conditioning system to continue operating.

[0068] S303: When the number of fluctuations of the compressor frequency is greater than or equal to the number threshold, the processor analyzes the current state of the indoor heat exchanger or the outdoor heat exchanger according to the usage time of the air conditioner.

[0069] S304, when the indoor heat exchanger or the outdoor heat exchanger is attenuated, the processor reduces the compressor frequency; and / or, when the indoor heat exchanger or the outdoor heat exchanger is improperly installed or used, the processor outputs an instruction to prompt after-sales maintenance.

[0070] Optionally, if the number of compressor frequency fluctuations within the first time period T1 is greater than or equal to a frequency threshold, the processor periodically executes the above method until the number of compressor frequency fluctuations within the first time period T1 is less than the frequency threshold. At this point, the compressor frequency fluctuation range is within a normal range, and the compressor can continue to operate within the existing frequency range.

[0071] The system periodically monitors compressor frequency fluctuations and the air conditioner's usage time to analyze the current status of the indoor or outdoor heat exchanger. If the indoor or outdoor heat exchanger experiences attenuation, the compressor frequency is reduced. By reducing the compressor frequency, the adjusted compressor frequency matches the attenuated state of the indoor or outdoor heat exchanger. This reduces compressor frequency fluctuations during operation. If the indoor or outdoor heat exchanger is improperly installed or used, a command is output to request after-sales service. The indoor or outdoor heat exchanger can be promptly adjusted to optimal operating conditions, thereby reducing compressor frequency fluctuations during operation. This system improves the stability of the air conditioner system after the heat exchange effect of the indoor or outdoor heat exchanger has decayed to a certain extent after a certain period of use.

[0072] Combine Figure 4 As shown, the embodiment of the present disclosure provides another method for controlling an air conditioner, comprising:

[0073] S401 , when the temperature at the air inlet of the outdoor unit is in the range of 35° C. to 43° C., the detection device detects changes in the operating frequency of the compressor in the range of 30 Hz to 120 Hz within 2 hours.

[0074] S402: The detection device counts the number of times the fluctuation threshold of the operating frequency change is greater than or equal to 5 Hz to obtain the number of fluctuations of the compressor frequency.

[0075] In step S403 , the processor determines whether the number of fluctuations of the compressor frequency is less than 3. If so, the process proceeds to step S4041 ; if not, the process proceeds to step S4042 .

[0076] S4041: The processor controls the air conditioning system to continue operating.

[0077] S4042: The processor analyzes the current state of the heat exchanger based on the usage time of the air conditioner.

[0078] S4051: When the air conditioner has been in use for 5 years or more, the processor determines that the heat exchanger has degraded.

[0079] S4061, the processor lowers the operating frequency of the compressor according to the set frequency reduction value of 2 Hz; or, the processor determines the frequency reduction value corresponding to the number of fluctuations of the compressor frequency according to a preset corresponding relationship and lowers the operating frequency of the compressor.

[0080] S4052: When the air conditioner is less than 4 years old, the processor determines that the heat exchanger is improperly installed or used.

[0081] S4062: The processor outputs an instruction prompting after-sales maintenance.

[0082] Combine Figure 5 The present disclosure provides an apparatus for controlling an air conditioner, comprising a detection module 51, an analysis module 52, and a control module 53. The detection module 51 detects the number of compressor frequency fluctuations within a first time period T1. If the number of compressor frequency fluctuations is greater than or equal to a threshold, the analysis module 52 analyzes the current status of the indoor heat exchanger or the outdoor heat exchanger based on the air conditioner's usage time. The control module 53 is configured to reduce the compressor frequency or output a command prompting after-sales maintenance.

[0083] Combine Figure 6 , an embodiment of the present disclosure provides a device for controlling an air conditioner, comprising a processor 100 and a memory 101. Optionally, the device for controlling an air conditioner may further comprise a communication interface 102 and a bus 103. The processor 100, the communication interface 102, and the memory 101 may communicate with each other via the bus 103. The communication interface 102 may be used for information transmission. The processor 100 may call the logic instructions in the memory 101 to execute the method for controlling an air conditioner of the above embodiment.

[0084] In addition, the logic instructions in the memory 101 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0085] The memory 101, as a storage medium, can be used to store software programs and computer executable programs, such as program instructions / modules corresponding to the methods in the embodiments of the present disclosure. The processor 100 executes the program instructions / modules stored in the memory 101 to execute functional applications and data processing, thereby implementing the air conditioner control method in the above-mentioned embodiments.

[0086] The memory 101 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 101 may include high-speed random access memory and non-volatile memory.

[0087] An embodiment of the present disclosure provides an air conditioner, comprising the above-mentioned device for controlling an air conditioner.

[0088] An embodiment of the present disclosure provides a storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for controlling an air conditioner.

[0089] The aforementioned storage medium may be a transient computer-readable storage medium or a non-transient computer-readable storage medium. Non-transient storage media include various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks. These media may also be transient storage media.

[0090] The above description and the accompanying drawings fully illustrate the embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless explicitly required, separate components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or replace parts and features of other embodiments. Moreover, the words used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to also include plural forms. Similarly, the term "and / or" as used in this application refers to any and all possible combinations of one or more associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups of these. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be found in the description of the method part.

[0091] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0092] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified function or action, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for controlling an air conditioner, characterized in that: include: Detect the temperature at the air inlet of the outdoor unit and preset the temperature range; When the temperature is within the preset temperature range, the number of fluctuations of the compressor frequency is detected within a first time period T1; When the number of fluctuations of the compressor frequency is greater than or equal to the number threshold, and the usage time of the air conditioner is greater than or equal to the second time period T2, it is determined that the heat exchanger has decayed; If the usage time of the air conditioner is less than the third time period T3, it is determined that the heat exchanger is improperly installed or used; wherein T3≤T2, the second time period T2 and the third time period T3 are the years of usage of the air conditioner; In case of improper installation or use of the heat exchanger, the output instruction prompts after-sales maintenance; In the event of attenuation of the heat exchanger, the operating frequency of the compressor is lowered according to the set frequency reduction value; or the operating frequency of the compressor is lowered according to the number of fluctuations of the compressor frequency; wherein the number of fluctuations of the compressor frequency is positively correlated with the frequency reduction value of the compressor frequency.

2. The method according to claim 1, characterized in that According to the number of fluctuations in the compressor frequency, reduce the operating frequency of the compressor, including: Determine the frequency reduction value according to the number of fluctuations of the compressor frequency; According to the determined frequency reduction value, reduce the operating frequency of the compressor.

3. The method according to claim 2, characterized in that The frequency reduction value is determined based on the number of compressor frequency fluctuations, including: According to the preset corresponding relationship, the frequency reduction value corresponding to the number of fluctuations of the compressor frequency is determined.

4. The method according to any one of claims 1 to 3, characterized in that The number of fluctuations of the compressor frequency is detected within the first time period T1, including: During the first time period T1, the operating frequency change of the compressor within the set frequency range is detected; The number of times the operating frequency changes is greater than or equal to the fluctuation threshold is counted to obtain the number of fluctuations in the compressor frequency.

5. The method according to any one of claims 1 to 3, characterized in that Also includes: When the number of fluctuations of the compressor frequency is less than the number threshold, the air conditioning system continues to operate.

6. A device for controlling an air conditioner, characterized in that: include: The detection module detects the temperature at the air inlet of the outdoor unit and presets the temperature range; When the temperature is within the preset temperature range, the number of fluctuations of the compressor frequency is detected within a first time period T1; The analysis module determines that the heat exchanger has attenuated when the number of fluctuations of the compressor frequency is greater than or equal to a number threshold and when the air conditioner has been in use for a time period greater than or equal to a second time period T2; If the usage time of the air conditioner is less than the third time period T3, it is determined that the heat exchanger is improperly installed or used; wherein T3≤T2, the second time period T2 and the third time period T3 are the years of usage of the air conditioner; The control module outputs instructions to prompt after-sales maintenance if the heat exchanger is improperly installed or used; if the heat exchanger is attenuated, the operating frequency of the compressor is lowered according to the set frequency reduction value; or the operating frequency of the compressor is lowered according to the number of fluctuations of the compressor frequency; among which the number of fluctuations of the compressor frequency is positively correlated with the frequency reduction value of the compressor frequency.

7. A device for controlling an air conditioner, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for controlling an air conditioner according to any one of claims 1 to 5 when running the program instructions.

8. An air conditioner comprising a compressor and a heat exchanger, characterized in that: It also includes the device for controlling an air conditioner as claimed in claim 6 or 7.

9. A storage medium storing program instructions, characterized in that: When the program instructions are executed, the method for controlling an air conditioner according to any one of claims 1 to 5 is executed.

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