Multi-connected air conditioner control method, device, equipment and storage medium

Abstract

The application provides a multi-connected air conditioner control method, device, equipment and storage medium, obtains indoor environment temperatures of environments corresponding to each indoor unit to be cleaned in a multi-connected air conditioner; determines a target pipe-in temperature according to the indoor environment temperatures and preset operation parameters of a self-cleaning mode corresponding to each indoor unit; obtains actual pipe-in temperatures of refrigerant input ends in each indoor unit when a compressor in the multi-connected air conditioner operates at the target pipe-in temperature, and adjusts the frequency of the compressor in the multi-connected air conditioner according to the actual pipe-in temperature and the target pipe-in temperature. Based on the indoor environment temperatures corresponding to each indoor unit and the preset operation parameters of the self-cleaning mode, the target pipe-in temperature is determined as a standard temperature, and the frequency of the compressor is adjusted according to the actual pipe-in temperature and the target pipe-in temperature, so that the stability of the output capacity of the compressor is ensured, batch self-cleaning control of the indoor unit of the multi-connected air conditioner is realized, and the stability of the self-cleaning of the multi-connected air conditioner is improved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, specifically to a multi-split air conditioning control method, apparatus, equipment, and storage medium. Background Technology

[0002] With the rapid development of the air conditioning industry, multi-split air conditioners have become increasingly widely used. Multi-split systems typically use a structure where one outdoor unit corresponds to multiple indoor units, enabling one-to-many air conditioning control. However, after prolonged use, dust easily accumulates on the evaporator, which can breed bacteria and affect air quality. Because the control parameters of the indoor units differ, related technologies generally rely on individual indoor unit defrosting control for self-cleaning, resulting in lower self-cleaning efficiency for multi-split air conditioners. Summary of the Invention

[0003] This application provides a method, apparatus, device, and storage medium for controlling multi-split air conditioners, aiming to solve the technical problem of low self-cleaning control efficiency in multi-split air conditioners. By performing batch self-cleaning control on each indoor unit, the self-cleaning efficiency of the multi-split air conditioner is improved.

[0004] In a first aspect, this application provides a method for controlling a multi-split air conditioner, comprising:

[0005] Obtain the ambient temperature of the environment corresponding to each indoor unit in a multi-split air conditioner that needs to be cleaned;

[0006] The target inlet temperature is determined based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode of each indoor unit. The preset operating parameters include at least one of the set temperature, the opening degree of the electronic expansion valve, and the indoor fan speed.

[0007] The actual refrigerant inlet temperature of each indoor unit is obtained when the compressor in the multi-split air conditioner is running at the target inlet temperature.

[0008] The frequency of the compressor in the multi-split air conditioner is adjusted based on the actual inlet pipe temperature and the target inlet pipe temperature.

[0009] In one possible implementation of this application, determining the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode corresponding to each indoor unit includes:

[0010] The set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode are obtained.

[0011] The target set temperature is determined based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature.

[0012] The target inlet pipe temperature is obtained by combining the target set temperature, the average speed of the indoor fan, the average opening of the electronic expansion valve, and the average ambient temperature.

[0013] In one possible implementation of this application, determining the target set temperature based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature includes:

[0014] For each indoor unit, a temperature difference value is determined based on the set temperature and the indoor ambient temperature, and the indoor ambient temperature is corrected based on the temperature difference value.

[0015] The temperature-corrected indoor ambient temperature is summed to obtain the first temperature, and the temperature difference values ​​corresponding to each indoor unit are summed to obtain the second temperature.

[0016] Calculate the ratio of the first temperature to the second temperature to obtain the target set temperature.

[0017] In one possible implementation of this application, obtaining the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in its corresponding self-cleaning mode includes:

[0018] Obtain the status parameters of each indoor unit, including any one of the following: self-cleaning operation time, indoor heat exchanger frost thickness, and indoor heat exchanger temperature.

[0019] If the state parameters meet the operating conditions for the self-cleaning condensation stage or the self-cleaning frosting stage, then the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode are obtained.

[0020] In one possible implementation of this application, adjusting the frequency of the compressor in the multi-split air conditioner based on the actual inlet pipe temperature and the target inlet pipe temperature includes:

[0021] The actual inlet temperature is averaged to obtain the average actual inlet temperature.

[0022] The frequency adjustment parameters are determined based on the deviation between the actual average inlet temperature and the target inlet temperature.

[0023] The compressor frequency is adjusted according to the frequency adjustment parameters.

[0024] In one possible implementation of this application, obtaining the indoor ambient temperature of the environment corresponding to each indoor unit to be cleaned in a multi-split air conditioner includes:

[0025] Receive self-cleaning requests from indoor units in a multi-split air conditioner;

[0026] Based on the indoor unit identifier carried in the self-cleaning request, the indoor units that sent the self-cleaning request are screened to determine the indoor units to be cleaned.

[0027] The system broadcasts a self-cleaning condensation stage control command to the indoor unit and receives the indoor ambient temperature feedback from each indoor unit.

[0028] In one possible implementation of this application, before filtering the indoor units sending self-cleaning requests based on the indoor unit identifier carried in the self-cleaning request to determine the indoor unit to be cleaned, the method further includes:

[0029] Obtain version information for the self-cleaning function of the indoor unit in a multi-split air conditioner;

[0030] Based on the correspondence between the version information and the preset version information, determine the indoor unit that is compatible with self-cleaning;

[0031] Assign self-cleaning identification information to the indoor units that are compatible with self-cleaning, so as to control the determination of the indoor unit to be cleaned based on the self-cleaning identification information.

[0032] Secondly, this application also provides a multi-split air conditioning control device, the device comprising:

[0033] First acquisition module: used to acquire the indoor ambient temperature of each indoor unit to be cleaned in a multi-split air conditioner;

[0034] Determining module: used to determine the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the corresponding self-cleaning mode of each indoor unit, wherein the preset operating parameters include at least one of the set temperature, the opening degree of the electronic expansion valve and the indoor fan speed;

[0035] The second acquisition module is used to acquire the actual refrigerant input temperature of each indoor unit when the compressor in the multi-split air conditioner is running at the target inlet pipe temperature.

[0036] Adjustment module: used to control the frequency of the compressor in the multi-split air conditioner to adjust according to the actual inlet pipe temperature and the target inlet pipe temperature.

[0037] Thirdly, this application also provides a multi-split air conditioning control device, the multi-split air conditioning control device comprising:

[0038] One or more processors;

[0039] Memory; and

[0040] One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps in any of the multi-split air conditioning control methods.

[0041] Fourthly, this application also provides a computer-readable storage medium having a computer program stored thereon, the computer program being loaded by a processor to perform the steps in any of the multi-split air conditioning control methods described above.

[0042] This application provides a multi-split air conditioner control method, apparatus, equipment, and storage medium. It acquires the indoor ambient temperature of each indoor unit to be cleaned within the multi-split air conditioner; determines a target inlet pipe temperature based on the indoor ambient temperature and preset operating parameters of the self-cleaning mode corresponding to each indoor unit, wherein the preset operating parameters include at least one of a set temperature, an electronic expansion valve opening, and an indoor fan speed; acquires the actual inlet pipe temperature of the refrigerant input terminal in each indoor unit when the compressor in the multi-split air conditioner operates at the target inlet pipe temperature; and adjusts the frequency of the compressor in the multi-split air conditioner based on the actual inlet pipe temperature and the target inlet pipe temperature. This solution collects the indoor ambient temperature corresponding to multiple indoor units and determines the target inlet pipe temperature as the standard temperature based on the indoor ambient temperature of each indoor unit and the preset operating parameters corresponding to the self-cleaning mode. The compressor operation is controlled according to the target inlet pipe temperature, and the actual inlet pipe temperature of the refrigerant input terminal of each indoor unit is detected in real time. The compressor frequency is adjusted according to the actual inlet pipe temperature and the target inlet pipe temperature to ensure the stability of the compressor output capacity. This achieves batch self-cleaning control of indoor units of multi-split air conditioners and improves the stability of self-cleaning of multi-split air conditioners. Attached Figure Description

[0043] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of a scenario for the multi-split air conditioning control method provided in the embodiments of this application;

[0045] Figure 2 This is a schematic flowchart of an embodiment of the multi-split air conditioning control method provided in this application.

[0046] Figure 3 This is a schematic flowchart of one implementation scheme for determining the target inlet pipe temperature in the multi-split air conditioning control method provided in this application embodiment;

[0047] Figure 4 A schematic flowchart of one implementation scheme for obtaining preset operating parameters in the self-cleaning mode of the multi-split air conditioner control method provided in this application embodiment;

[0048] Figure 5 A schematic flowchart of one implementation scheme for compressor frequency adjustment in self-cleaning mode in the multi-split air conditioner control method provided in this application embodiment;

[0049] Figure 6 A schematic flowchart illustrating another implementation of the multi-split air conditioning control method provided in this application;

[0050] Figure 7 This is a schematic diagram of an embodiment of the multi-split air conditioning control device provided in this application.

[0051] Figure 8 This is a schematic diagram of an embodiment of the multi-split air conditioning control device provided in this application. Detailed Implementation

[0052] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0053] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] In this embodiment, "and / or" describes the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / ", unless otherwise specified, generally indicates that the preceding and following associated objects have an "or" relationship.

[0055] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0056] This application provides a multi-split air conditioning control method, apparatus, device, and computer-readable storage medium (hereinafter referred to as storage medium), which will be described in detail below.

[0057] The multi-split air conditioner control method in this embodiment of the invention is applied to a multi-split air conditioner control device. The multi-split air conditioner control device is installed in a multi-split air conditioner control equipment. The multi-split air conditioner control equipment is provided with one or more processors, a memory, and one or more application programs. The one or more application programs are stored in the memory and configured to be executed by the processor to implement the multi-split air conditioner control method. The multi-split air conditioner control equipment can be a terminal, such as a mobile phone or a tablet computer. The multi-split air conditioner control equipment can also be the outdoor unit of a multi-split air conditioner or any indoor unit of a multi-split air conditioner. It is understood that a multi-split air conditioner generally includes one outdoor unit and multiple indoor units. The number of indoor units is not specifically limited in this invention.

[0058] like Figure 1 As shown, Figure 1 This is a schematic diagram of a multi-split air conditioner control method according to an embodiment of this application. The multi-split air conditioner control scenario in this embodiment includes a multi-split air conditioner control device 100 (the multi-split air conditioner control device 100 integrates a multi-split air conditioner control unit). The multi-split air conditioner control device 100 is the outdoor unit of the multi-split air conditioner. The multi-split air conditioner control device 100 runs a computer-readable storage medium corresponding to the multi-split air conditioner control to execute the steps of the multi-split air conditioner control.

[0059] In this embodiment of the invention, the multi-split air conditioning control device 100 is mainly used for: acquiring the indoor ambient temperature of each indoor unit to be cleaned in the multi-split air conditioning system; determining the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode of each indoor unit, wherein the preset operating parameters include at least one of the set temperature, the opening degree of the electronic expansion valve, and the indoor fan speed; acquiring the actual inlet pipe temperature of the refrigerant input terminal in each indoor unit when the compressor in the multi-split air conditioning system is running at the target inlet pipe temperature; and adjusting the frequency of the compressor in the multi-split air conditioning system based on the actual inlet pipe temperature and the target inlet pipe temperature.

[0060] In this embodiment of the invention, the multi-split air conditioning control device 100 can be an independent multi-split air conditioning control device, or it can be a network or cluster of multi-split air conditioning control devices. For example, the multi-split air conditioning control device 100 described in this embodiment includes, but is not limited to, a computer, a network host, a single network multi-split air conditioning control device, a set of multiple network multi-split air conditioning control devices, or a cloud multi-split air conditioning control device composed of multiple multi-split air conditioning control devices. The cloud multi-split air conditioning control device is composed of a large number of computer or network multi-split air conditioning control devices based on cloud computing.

[0061] Those skilled in the art will understand that Figure 1 The application environment shown is merely one application scenario of the solution in this application and does not constitute a limitation on the application scenario of the solution in this application. Other application environments may include those that are more specific to this application. Figure 1 The more or fewer multi-split air conditioning control devices shown, or the network connection relationships of multi-split air conditioning control devices, for example... Figure 1 Only one multi-split air conditioning control device is shown in the diagram. It is understood that the scenario of this multi-split air conditioning control method may also include one or more other multi-split air conditioning control devices, which are not specifically limited here. The multi-split air conditioning control device 100 may also include a memory for storing data, such as storing image information acquired by shooting.

[0062] Furthermore, in the scenario of the multi-split air conditioner control method of this application, the multi-split air conditioner control device 100 may be equipped with a display device, or the multi-split air conditioner control device 100 may not have a display device but may communicate with an external display device 200. The display device 200 is used to output the results of the execution of the multi-split air conditioner control method in the multi-split air conditioner control device. The multi-split air conditioner control device 100 can access the background database 300 (the background database may be located in the local storage of the multi-split air conditioner control device, or it may be located in the cloud). The background database 300 stores information related to multi-split air conditioner control.

[0063] It should be noted that, Figure 1 The schematic diagram of the multi-split air conditioning control method shown is merely an example. The scenarios of the multi-split air conditioning control method described in the embodiments of the present invention are for the purpose of more clearly illustrating the technical solutions of the embodiments of the present invention, and do not constitute a limitation on the technical solutions provided in the embodiments of the present invention.

[0064] Based on the scenarios described above for multi-split air conditioning control methods, an embodiment of the multi-split air conditioning control method is proposed.

[0065] like Figure 2 The diagram shown is a flowchart of an embodiment of the multi-split air conditioner control method in this application. The multi-split air conditioner control method includes steps S201-S204:

[0066] S201. Obtain the indoor ambient temperature of each indoor unit in the multi-split air conditioner that needs to be cleaned.

[0067] The indoor ambient temperature corresponding to each indoor unit, that is, the indoor ambient temperature corresponding to the installation environment of the indoor unit, can be collected by an ambient temperature detection sensor.

[0068] Specifically, the ambient temperature of the indoor unit can be acquired after receiving the self-cleaning control command, or it can be acquired during the preset self-cleaning time of the multi-split unit.

[0069] It is understood that for each indoor ambient temperature, it can be collected by multiple ambient temperature acquisition devices installed in the same room corresponding to the indoor unit, and the average temperature collected by the multiple ambient temperature acquisition devices can be calculated as the indoor ambient temperature corresponding to the indoor unit.

[0070] S202. Determine the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode of each indoor unit.

[0071] The preset operating parameters include at least one of the following: set temperature, electronic expansion valve opening, and indoor fan speed. Specifically, these preset operating parameters are the preset parameters for each indoor unit's corresponding self-cleaning mode. It can be understood that different indoor units will have different preset operating parameters for their respective self-cleaning modes.

[0072] It can be further understood that the self-cleaning includes different working stages: condensation stage, frosting stage, defrosting stage, drying stage, etc., or the drying stage is included in the defrosting stage, or the condensation stage is included in the frosting stage to form a condensation and frosting stage, etc. The specific division of stages is not specifically limited in this application, and different preset operating parameters are corresponding to different stages. For example, the temperature of the condensation and frosting stage is set to 16 degrees.

[0073] The target inlet pipe temperature, i.e., the standard value of the actual inlet pipe temperature at the refrigerant input end of the indoor unit in self-cleaning mode, can be either the measured value of the actual inlet pipe temperature or the high-pressure saturation temperature value of the inlet pipe.

[0074] It is understood that the target inlet pipe temperature corresponds to different temperatures in different working stages of the self-cleaning mode. For example, the target inlet pipe temperature of the indoor unit in the condensation and frosting stage of the self-cleaning mode is different from the target inlet pipe temperature in the defrosting and drying stage.

[0075] It is understood that the technical solution of this application determines a new standard target inlet pipe temperature based on various indoor ambient temperatures and set temperatures to ensure a balanced and stable output capacity of the compressor. However, this application does not specifically limit the determination of the target inlet pipe temperature.

[0076] For example, by calculating the first average indoor ambient temperature and the second average temperature of the set temperature, a preset mapping table is looked up based on the first average temperature and the second average temperature to obtain the actual inlet temperature of the target location corresponding to the first average temperature and the second average temperature.

[0077] For example, the indoor ambient temperature and the set temperature can be substituted into a preset calculation formula to calculate the target inlet temperature.

[0078] The target inlet pipe temperature is determined by integrating the preset operating parameters for each indoor unit's self-cleaning mode and the ambient temperature of the indoor unit.

[0079] S203. Obtain the actual refrigerant inlet temperature of each indoor unit when the compressor in the multi-split air conditioner is running at the target inlet temperature.

[0080] Specifically, after obtaining the target inlet pipe temperature, the target inlet pipe temperature is converted into the compressor's working capacity. Based on the compressor's working capacity, the compressor's working frequency is determined to control the compressor's operation. It can be understood that the compressor's operating frequency and the target inlet pipe temperature can be converted through a preset calculation formula, or the compressor's operating frequency corresponding to the target inlet pipe temperature can be obtained by looking up a table. This application does not make any specific limitations.

[0081] The actual inlet temperature of the refrigerant input terminal in the indoor unit, that is, the inlet temperature of the refrigerant flowing into the indoor heat exchanger in the indoor unit during different working stages of the self-cleaning mode, can be understood as the self-cleaning corresponding to different working stages including heating mode and cooling mode. That is, the actual inlet temperature of the refrigerant input terminal is not limited to a fixed end, but is determined according to the working stage.

[0082] Specifically, the control equipment of the multi-split air conditioner (in one embodiment of this application, the outdoor unit) controls the compressor to operate according to the target inlet pipe temperature, then acquires the actual inlet pipe temperature of the refrigerant input terminal in each indoor unit. Based on the actual inlet pipe temperature and the target inlet pipe temperature, it determines the compressor's work adjustment amount, thereby achieving dynamic adjustment of the compressor and ensuring the stability of the compressor's work capacity. It is understood that the actual inlet pipe temperature can be acquired according to a preset acquisition frequency or detected in real time. When the dynamic temperature change of the actual inlet pipe temperature corresponding to any indoor unit exceeds a preset change amount, it triggers all indoor units to report their actual inlet pipe temperatures to the control equipment of the multi-split air conditioner, thus achieving the acquisition of the actual inlet pipe temperature.

[0083] S204. Adjust the frequency of the compressor in the multi-split air conditioner according to the actual inlet pipe temperature and the target inlet pipe temperature.

[0084] Specifically, the frequency of the compressor in the multi-split air conditioner is adjusted based on the actual inlet pipe temperature and the target inlet pipe temperature. Specifically, the deviation between the actual inlet pipe temperature and the target inlet pipe temperature can be calculated based on the target inlet pipe temperature, and the compressor frequency can be adjusted according to the deviation.

[0085] For example, by looking up a preset mapping table of deviation and frequency, the frequency adjustment parameter corresponding to the average deviation is obtained, thereby realizing the frequency adjustment of the compressor.

[0086] For example, the compressor frequency can be obtained by inputting the actual inlet pipe temperature and the target inlet pipe temperature of the compressor into a preset calculation formula, thereby achieving frequency adjustment of the compressor.

[0087] Furthermore, based on the above implementation plan, see [link to relevant documentation]. Figure 3 , Figure 3 This is a flowchart illustrating one implementation of the multi-split air conditioning control method provided in this application for determining the target inlet pipe temperature, including steps S301-S303:

[0088] S301. Obtain the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode.

[0089] It is understandable that multi-split air conditioners connect the outdoor unit and multiple indoor units through refrigerant transmission pipes. Each indoor unit has an electronic expansion valve on its corresponding refrigerant pipe. The electronic expansion valve controls the refrigerant flow of each indoor unit based on its opening degree. The opening degree of the electronic expansion valve is the opening degree of the electronic expansion valve used to adjust the flow of the indoor unit.

[0090] The fan speed refers to the fan speed of each indoor unit in self-cleaning mode.

[0091] It is understood that, in this implementation scheme, the preset operating parameters include the set temperature, electronic expansion valve opening, and indoor fan speed for the indoor unit in its self-cleaning mode. These preset operating parameters can be directly obtained from the preset memory stored in the multi-split air conditioner.

[0092] S302. Determine the target set temperature based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature.

[0093] Specifically, after acquiring the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in its corresponding self-cleaning mode, the multi-split air conditioning control equipment determines the target set temperature based on the indoor ambient temperature and the temperature difference between the corresponding indoor ambient temperature and the set temperature in each indoor unit. For example, the target set temperature can be obtained by inputting the temperature difference and the indoor ambient temperature into a preset calculation model.

[0094] In one embodiment of this application, determining the target set temperature based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature specifically includes the following steps:

[0095] (1) For each indoor unit, a temperature difference value is determined based on the set temperature and the indoor ambient temperature, and the indoor ambient temperature is corrected based on the temperature difference value;

[0096] (2) The temperature-corrected indoor ambient temperature is summed to obtain the first temperature, and the temperature difference value corresponding to each indoor unit is summed to obtain the second temperature;

[0097] (3) Calculate the ratio of the first temperature to the second temperature to obtain the target set temperature.

[0098] Specifically, please refer to the calculation formula for the above calculation steps:

[0099]

[0100] in, That is, the target set temperature, where △Tenv-target = Ti-env-Ti-target, Ti-env is the indoor ambient temperature of the i-th indoor unit, and Ti-target is the set temperature of the i-th indoor unit. For example, the set temperature of the i-th indoor unit during the condensation and frosting stage is 16 degrees.

[0101] Specifically, △Tenv-target×T i-envThat is, for each indoor unit, a temperature difference value is determined based on the set temperature and the indoor ambient temperature, and the indoor ambient temperature is corrected based on the temperature difference value.

[0102] S303. The target inlet pipe temperature is obtained by taking the target set temperature, the average speed of the indoor fan, the average opening of the electronic expansion valve, and the average ambient temperature of the indoor environment and outputting a preset fusion formula.

[0103] In one embodiment of this application, after obtaining the target set temperature, the average ambient temperature of each indoor environment, the average rotational speed of each indoor fan, and the average opening degree of each electronic expansion valve are calculated. The target set temperature, the average rotational speed of the indoor fans, the average opening degree of the electronic expansion valves, and the average ambient temperature are then input into a preset calculation formula to calculate the target inlet pipe temperature. The specific preset fusion formula is as follows:

[0104]

[0105] Among them, the K is the target inlet pipe temperature, and D1 is the proportionality coefficient for the target set temperature; T is the proportionality coefficient for the average opening value of the indoor unit's electronic expansion valve. EXV D2 is the average opening value of the indoor unit's electronic expansion valve, and T is the proportionality coefficient of the average indoor ambient temperature. in D3 is the average ambient temperature; D3 is the proportionality coefficient of the average indoor unit fan speed; V fan Average speed of indoor fans.

[0106] In this implementation scheme, the self-cleaning capability of each indoor unit is balanced by using a preset weighted algorithm, based on indoor ambient temperature and preset operating parameters corresponding to self-cleaning, to ensure the stability of the batch self-cleaning capability output of the compressor.

[0107] Furthermore, based on the above implementation plan, see [link to relevant documentation]. Figure 4 , Figure 4 A flowchart illustrating one implementation scheme for obtaining preset operating parameters in the self-cleaning mode of the multi-split air conditioner control method provided in this application embodiment includes steps S401-S404:

[0108] S401. Obtain the status parameters of each indoor unit.

[0109] The state parameters include any one of the following: self-cleaning duration, indoor heat exchanger frost thickness, and indoor heat exchanger temperature. It is understood that the indoor units of a multi-split air conditioner have different preset operating parameters for different self-cleaning stages. For example, during the condensation and frosting stages of self-cleaning, cooling is the primary function, while during the defrosting and drying stages, heating is the primary function. The required fan operation, electronic expansion valve opening, or fan speed may differ for each stage of operation. Therefore, the indoor units have different states for each stage. For example, during the condensation stage, there is water vapor on the indoor unit's heat exchanger; during the frosting stage, there is frost on the indoor heat exchanger. The temperature of the heat exchanger is different in each stage. In other words, this application can detect the state parameters of each indoor unit upon receiving a self-cleaning command to determine the appropriate stage for self-cleaning, thereby improving the efficiency of self-cleaning.

[0110] The self-cleaning duration can be the runtime of each self-cleaning stage of the indoor unit, or the overall runtime of each indoor unit in the self-cleaning state.

[0111] Understandably, the status parameters of each indoor unit can also be obtained during the self-cleaning process. For example, when controlling a certain working stage of self-cleaning, the status parameters can be obtained by accumulating the working time and the temperature of the indoor unit heat exchanger corresponding to that working stage.

[0112] S402. If the state parameters meet the operating conditions for the self-cleaning condensation stage or the self-cleaning frosting stage, then obtain the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode.

[0113] The self-cleaning condensation stage operating conditions and the self-cleaning frosting stage operating conditions can be preset according to corresponding state parameters. For example, if the state parameter is the self-cleaning work duration, then the self-cleaning condensation stage operating condition can be a duration of zero minutes, and the self-cleaning frosting stage operating condition can be 10 minutes. That is, the self-cleaning work duration is zero minutes. Then, the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode (condensation stage) are obtained. When the self-cleaning work duration is 10 minutes, the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode (frosting stage) are obtained again.

[0114] In some other embodiments of this application, if the state parameters meet the operating conditions for the self-cleaning condensation and frosting stage, the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode are obtained. It is understood that the operating conditions for the condensation and frosting stage can be preset according to the above-mentioned setting rules.

[0115] S403. Determine the target set temperature based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature.

[0116] S404. The target inlet pipe temperature is obtained by taking the target set temperature, the average speed of the indoor fan, the average opening of the electronic expansion valve, and the average ambient temperature of the indoor environment, and outputting a preset fusion formula.

[0117] Specifically, the specific steps of steps S403-S404 are shown in any of the above implementation schemes.

[0118] Specifically, different work stages are determined based on different state parameters in order to obtain preset operating parameters for different work stages.

[0119] In other embodiments of this application, if the state parameters meet the operating conditions for the self-cleaning defrost drying stage or the self-cleaning frosting stage, the set temperature and fan speed of the indoor unit in the corresponding self-cleaning mode are obtained. Based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature, a target set temperature is determined. Furthermore, based on the target set temperature, the average speed of the indoor fan, and the average ambient temperature, a target inlet pipe temperature is determined. For example, the calculation is described below:

[0120] During the self-cleaning defrosting and sterilization stage (defrosting and drying stage), when the system is in heating mode, the average system pressure is at a high pressure of 57°C and the inlet temperature of the indoor evaporator (indoor heat exchanger) coil is above 60°C, the system distribution capacity is stabilized, and the frequency of the variable frequency compressor is kept running smoothly and stably, thereby achieving a good defrosting and sterilization effect.

[0121] Self-cleaning, defrosting, and sterilization stage: Balanced capability control algorithm.

[0122] a. The target set temperature in the system is calculated using a weighted algorithm:

[0123]

[0124] Here, the subscript i represents the serial number of the indoor unit in the multi-split system. For example, the number of indoor units in a multi-split air conditioner is 80, i.e., i <= 80.

[0125] Where △Tenv-target = Ti-env - Ti-target. Ti-env is the indoor ambient temperature of the i-th indoor unit, which is 25°C for example. Ti-target is the set temperature of the i-th indoor unit, which is 31°C for example.

[0126] b. Calculate the average target high-pressure saturation temperature of the indoor unit evaporator inlet pipe (i.e., the target inlet pipe temperature):

[0127]

[0128] Where K is the proportionality coefficient of the target inlet pipe temperature; D1 is the proportionality coefficient of the average indoor ambient temperature; and T in D2 is the average ambient temperature; D2 is the proportionality coefficient of the average indoor unit speed; V fan Average indoor fan speed.

[0129] Furthermore, based on the above implementation plan, see [link to relevant documentation]. Figure 5 , Figure 5 This application provides a schematic flowchart of one implementation scheme for compressor frequency adjustment in self-cleaning mode in a multi-split air conditioning control method, including steps S501-S503:

[0130] S501. The actual inlet temperature is averaged to obtain the average actual inlet temperature.

[0131] The actual inlet pipe temperature refers to the average actual inlet pipe temperature obtained by controlling the compressor to run based on the target inlet pipe temperature, detecting the actual inlet pipe temperature, obtaining the actual inlet pipe temperature of each indoor unit at the same time, calculating the average value.

[0132] S502. Determine the frequency adjustment parameters based on the deviation change information between the actual average inlet pipe temperature and the target inlet pipe temperature.

[0133] Furthermore, the deviation between the average actual inlet pipe temperature and the target inlet pipe temperature is calculated, and the compressor frequency is adjusted accordingly based on the deviation change information. It can be understood that a preset PID balancing algorithm can be used to determine the frequency adjustment parameters based on the deviation change information between the average actual inlet pipe temperature and the target inlet pipe temperature, output the compression frequency, and realize real-time adjustment of the compressor frequency based on the deviation change information.

[0134] Specifically, in one embodiment of this application, the PID balancing algorithm is implemented as follows:

[0135] The PID principle is expressed by the following definition:

[0136]

[0137] Where e is the deviation Δp (i.e., the deviation between the target inlet temperature and the average actual inlet temperature), and T D Let Ti be the differential time and Ti be the integral time.

[0138] Based on the above, it can be deduced that:

[0139] Δp n =p n -pset n

[0140] Where, p n This refers to the average actual inlet pipe temperature of the indoor unit; that is:

[0141]

[0142]

[0143]

[0144] This expression represents the rate of change of the actual inlet pipe temperature of the indoor unit. Δt is the sampling time period for the inlet pipe temperature.

[0145] Simplified calculation yields:

[0146]

[0147] Where, Δp n Proportional gain: L p Δp n ;

[0148] Δp n Integral gain: L i ∑Δp n ;

[0149] ΔKpn differential gain: L d (Δp n -Δp n-1 );

[0150] △OUTPUT(Pn) is in percentage form (representing the percentage of current capacity added);

[0151] Furthermore, calculate the internal balancing capacity requirement value Qreal:

[0152] Q real =Q cac *△OUTPUT(Pn).

[0153] Among them, Q cac For the calculation of the basic capacity requirements of the indoor unit, it is understood that the basic capacity requirements can be obtained by converting the target inlet pipe temperature. The conversion method can be found by looking up a preset mapping table or calculated based on a preset conversion formula. This application does not make any specific limitations.

[0154] That is, multiply the basic capacity requirement (compressor power output capacity requirement value) by a percentage to obtain an actual capacity requirement value, and determine the target frequency of the compressor based on the actual capacity requirement value, that is, the frequency adjustment parameter.

[0155] S503. Adjust the compressor frequency according to the frequency adjustment parameters.

[0156] Furthermore, the compressor frequency is controlled according to the frequency adjustment parameters to ensure the stability of the compressor's output capacity.

[0157] Furthermore, based on the above implementation plan, see [link to relevant documentation]. Figure 6 , Figure 6 A schematic flowchart of another embodiment of the multi-split air conditioning control method provided in this application includes steps S601-S606:

[0158] S601: Receives a self-cleaning request sent by the indoor unit of a multi-split air conditioner.

[0159] The self-cleaning request of the multi-split air conditioner can be initiated autonomously by one or more indoor units, or it can be obtained by inputting a self-cleaning command based on any indoor unit.

[0160] For example, a user sends a self-cleaning start request based on a certain indoor unit, and multiple indoor units simultaneously send self-cleaning start requests to the user's terminal.

[0161] S602. Based on the indoor unit identifier carried in the self-cleaning request, filter the indoor units that sent the self-cleaning request and determine the indoor unit to be cleaned.

[0162] The indoor unit identifier, that is, the identification information of each indoor unit, can be, for example, an indoor unit number.

[0163] Furthermore, after receiving the self-cleaning command sent by the indoor unit, the multi-split air conditioning control device obtains the identification information of each indoor unit and filters according to the identification information. For example, the identification information is compared with a preset identification database that can perform batch self-cleaning, and the indoor units corresponding to the identification information included in the preset identification database that can perform batch self-cleaning are identified as the indoor units to be cleaned.

[0164] S603. Broadcast a self-cleaning condensation stage control command to the indoor unit and receive the indoor ambient temperature feedback from each indoor unit.

[0165] Furthermore, in this embodiment, the multi-split air conditioner uses a CAN bus for communication, exemplarily with a baud rate of 20kbps and a communication cycle of 200ms, ensuring low latency for self-cleaning commands and status updates. Multiple indoor units send cleaning requests to the outdoor unit via the bus. The outdoor unit uses the indoor unit identifier to arbitrate and selects the indoor units to be cleaned, then obtains the operating status of each selected unit. If an indoor unit is in operation, it can determine whether to remove it from the group of units to be cleaned based on its cleaning priority. After determining the final indoor units to be cleaned, a self-cleaning condensation stage control command is broadcast to each indoor unit, and the indoor ambient temperature is received from each unit. It is understood that in other embodiments of this application, the indoor and outdoor units can also communicate via a wireless communication module.

[0166] S604. Determine the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode of each indoor unit.

[0167] The preset operating parameters include at least one of the following: set temperature, electronic expansion valve opening, and indoor fan speed;

[0168] S605. Obtain the actual refrigerant inlet temperature of each indoor unit when the compressor in the multi-split air conditioner is running at the target inlet temperature.

[0169] S606. Adjust the frequency of the compressor in the multi-split air conditioner according to the actual inlet pipe temperature and the target inlet pipe temperature.

[0170] The specific implementation of steps S604-S606 is not specifically limited in this application.

[0171] Furthermore, in some other embodiments of this application, before filtering the indoor units that sent the self-cleaning requests based on the indoor unit identifier carried in the self-cleaning request to determine the indoor unit to be cleaned, the method further includes the following steps:

[0172] (1) Obtain the version information of the self-cleaning function of the indoor unit in the multi-split air conditioner;

[0173] (2) Determine compatible self-cleaning indoor units based on the correspondence between the version information and the preset version information;

[0174] (3) Assign self-cleaning identification information to the indoor unit that is compatible with self-cleaning, so as to control the determination of the indoor unit to be cleaned based on the self-cleaning identification information.

[0175] The version information, i.e., the program version information executed by the indoor unit's self-cleaning function, can be understood as different indoor units may have incompatible self-cleaning control versions, meaning they cannot be controlled to perform self-cleaning simultaneously. It is understood that compatible self-cleaning version information (preset version information) can be preset, and the compatible indoor units can be controlled according to the version information. Self-cleaning identification information is also broadcast and distributed to the compatible indoor units to control the determination of the indoor unit to be cleaned based on the self-cleaning identification information. That is, when an indoor unit sends a self-cleaning request, the self-cleaning request carries the self-cleaning identification information. The self-cleaning identification information can be a group identifier for a group of compatible indoor units. It is understood that the self-cleaning identification information can be used as a substitute for the aforementioned indoor unit identifier.

[0176] For example, the design follows a master-slave protocol. The outdoor unit (indoor unit) acts as the self-cleaning control master (multi-split air conditioning control device), and the indoor units act as slave units. The outdoor unit can simultaneously control 80 indoor units for self-cleaning operations. The execution flow is as follows: The master unit identifies and assigns an indoor unit self-cleaning IPID (self-cleaning identification information) -> The indoor unit (infrared / wired trigger request / remote control) initiates a self-cleaning request -> The master unit arbitrates the indoor unit's request -> The master unit successfully arbitrates -> The master unit broadcasts a system request -> The indoor unit writes a request -> The indoor unit reports its write status (indoor unit operating status) -> The master unit detects that the system request status is ready -> The master unit broadcasts a condensation command -> The master unit detects that the system is ready for condensation -> The indoor units perform condensation -> The master unit determines that the system condensation is complete (this can be based on the status parameters of the indoor units) -> The master unit broadcasts a frosting command -> The master unit detects that the system is ready for frosting -> The indoor units perform frosting -> The master unit determines that the system frosting is complete -> The process is as follows: The host broadcasts a defrost and sterilization command -> the outdoor unit detects that the system is ready for defrost and sterilization -> the indoor unit performs defrost and sterilization -> the outdoor unit determines that the system has completed defrost and sterilization -> the host broadcasts a self-cleaning completion command -> the indoor unit performs sub-cleaning and exits -> the indoor unit reports its exit status -> the outdoor unit's arbitration system completes sub-cleaning -> the host system exits sub-cleaning; In other words, the outdoor unit identifies and assigns a cleaning ID; the indoor unit responds with a self-cleaning request; the host selects the target indoor unit for self-cleaning and broadcasts a self-cleaning command to the target indoor unit; the target indoor unit responds with its status, and the host controls the target indoor unit to perform condensation according to the device's settings; the outdoor unit determines that condensation is complete and controls frosting; the outdoor unit determines that frosting is complete and controls defrost and sterilization; the outdoor unit determines that defrost and sterilization is complete and controls the exit from self-cleaning. This completes the batch self-cleaning control of the indoor units.

[0177] Specifically, in some implementation schemes, for scenarios where self-cleaning is not possible (wine cellars / laboratories / constant temperature rooms, etc.), a disabling setting can be configured via a wired controller / remote controller / programmable control system. That is, the multi-split air conditioning control equipment assigns a disabling self-cleaning flag to the corresponding indoor unit based on the indoor unit's installation environment information. After the indoor unit is set with the disabling self-cleaning flag, it will refuse to request a self-cleaning IPID and will not perform sub-cleaning related actions when the main outdoor unit's self-cleaning function is recognized. Furthermore, for older models that have already been shipped and do not have a self-cleaning function or a self-cleaning flag, the indoor unit will not request a self-cleaning IPID and will not perform sub-cleaning related actions when the main outdoor unit's self-cleaning function is recognized. Further, in some implementation schemes, the indoor unit's electronic expansion valve is uniformly controlled by the outdoor unit. Indoor units without an assigned self-cleaning IPID will operate with the indoor valve closed during the cooling defrost / frost stage and with the minimum valve opening during the heating sterilization defrost stage. This achieves batch self-cleaning control for different models.

[0178] This application provides a multi-split air conditioner control method. It acquires the indoor ambient temperature of each indoor unit to be cleaned within the multi-split air conditioner; and determines a target inlet pipe temperature based on the indoor ambient temperature and preset operating parameters of the self-cleaning mode for each indoor unit. The preset operating parameters include at least one of a set temperature, electronic expansion valve opening, and indoor fan speed. It also acquires the actual inlet pipe temperature of the refrigerant input terminal in each indoor unit when the compressor operates at the target inlet pipe temperature, and adjusts the compressor frequency based on the actual inlet pipe temperature and the target inlet pipe temperature. This solution collects the indoor ambient temperature corresponding to multiple indoor units and determines the target inlet pipe temperature as a standard temperature based on the indoor ambient temperature of each indoor unit and the preset operating parameters corresponding to the self-cleaning mode. The compressor operation is controlled according to the target inlet pipe temperature, and the actual inlet pipe temperature of the refrigerant input terminal of each indoor unit is monitored in real time. The compressor frequency is adjusted based on the actual inlet pipe temperature and the target inlet pipe temperature to ensure the stability of the compressor output capacity, thereby achieving batch self-cleaning control of the indoor units of the multi-split air conditioner and improving the stability of the self-cleaning process.

[0179] To better implement the multi-split air conditioner control method in the embodiments of this application, a multi-split air conditioner control device is also provided in the embodiments of this application, such as... Figure 7 As shown, the multi-split air conditioning control device includes modules 701-704:

[0180] First acquisition module 701: used to acquire the indoor ambient temperature of each indoor unit to be cleaned in a multi-split air conditioner;

[0181] Determining module 702: used to determine the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the corresponding self-cleaning mode of each indoor unit, wherein the preset operating parameters include at least one of the set temperature, the opening degree of the electronic expansion valve and the indoor fan speed;

[0182] The second acquisition module 703 is used to acquire the actual refrigerant input temperature of each indoor unit when the compressor in the multi-split air conditioner is running at the target inlet pipe temperature.

[0183] Adjustment module 704: used to control the frequency of the compressor in the multi-split air conditioner to be adjusted according to the actual inlet pipe temperature and the target inlet pipe temperature.

[0184] In one embodiment of this application, the determining module 702 is used to determine the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode corresponding to each indoor unit, specifically including:

[0185] The set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode are obtained.

[0186] The target set temperature is determined based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature.

[0187] The target inlet pipe temperature is obtained by combining the target set temperature, the average speed of the indoor fan, the average opening of the electronic expansion valve, and the average ambient temperature.

[0188] In one embodiment of this application, the determining module 702 is configured to determine a target set temperature based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature, specifically including:

[0189] For each indoor unit, a temperature difference value is determined based on the set temperature and the indoor ambient temperature, and the indoor ambient temperature is corrected based on the temperature difference value.

[0190] The temperature-corrected indoor ambient temperature is summed to obtain the first temperature, and the temperature difference values ​​corresponding to each indoor unit are summed to obtain the second temperature.

[0191] Calculate the ratio of the first temperature to the second temperature to obtain the target set temperature.

[0192] In one embodiment of this application, the determining module 702 is used to acquire the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in its corresponding self-cleaning mode, specifically including:

[0193] Obtain the status parameters of each indoor unit, including any one of the following: self-cleaning operation time, indoor heat exchanger frost thickness, and indoor heat exchanger temperature.

[0194] If the state parameters meet the operating conditions for the self-cleaning condensation stage or the self-cleaning frosting stage, then the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode are obtained.

[0195] In one embodiment of this application, the adjustment module 704 is used to control the frequency of the compressor in the multi-split air conditioner to be adjusted according to the actual inlet pipe temperature and the target inlet pipe temperature, specifically including:

[0196] The actual inlet temperature is averaged to obtain the average actual inlet temperature.

[0197] The frequency adjustment parameters are determined based on the deviation between the actual average inlet temperature and the target inlet temperature.

[0198] The compressor frequency is adjusted according to the frequency adjustment parameters.

[0199] In one embodiment of this application, the first acquisition module 701 is used to acquire the indoor ambient temperature of each indoor unit to be cleaned in a multi-split air conditioner, specifically including:

[0200] Receive self-cleaning requests from indoor units in a multi-split air conditioner;

[0201] Based on the indoor unit identifier carried in the self-cleaning request, the indoor units that sent the self-cleaning request are screened to determine the indoor units to be cleaned.

[0202] The system broadcasts a self-cleaning condensation stage control command to the indoor unit and receives the indoor ambient temperature feedback from each indoor unit.

[0203] In one embodiment of this application, the first acquisition module 701 is configured to: filter the indoor units sending self-cleaning requests based on the indoor unit identifier carried in the self-cleaning request; before determining the indoor unit to be cleaned, specifically include:

[0204] Obtain version information for the self-cleaning function of the indoor unit in a multi-split air conditioner;

[0205] Based on the correspondence between the version information and the preset version information, determine the indoor unit that is compatible with self-cleaning;

[0206] Assign self-cleaning identification information to the indoor units that are compatible with self-cleaning, so as to control the determination of the indoor unit to be cleaned based on the self-cleaning identification information.

[0207] This application provides a multi-split air conditioner control device, comprising: a first acquisition module for acquiring the indoor ambient temperature of each indoor unit to be cleaned in the multi-split air conditioner; a determination module for determining a target inlet pipe temperature based on the indoor ambient temperature and preset operating parameters of the self-cleaning mode of each indoor unit, wherein the preset operating parameters include at least one of a set temperature, an electronic expansion valve opening, and an indoor fan speed; a second acquisition module for acquiring the actual inlet pipe temperature of the refrigerant input terminal in each indoor unit when the compressor in the multi-split air conditioner is running at the target inlet pipe temperature; and an adjustment module for adjusting the frequency of the compressor in the multi-split air conditioner based on the actual inlet pipe temperature and the target inlet pipe temperature. This solution collects the indoor ambient temperature corresponding to multiple indoor units and determines the target inlet pipe temperature as the standard temperature based on the indoor ambient temperature of each indoor unit and the preset operating parameters corresponding to the self-cleaning mode. The compressor operation is controlled according to the target inlet pipe temperature, and the actual inlet pipe temperature of the refrigerant input terminal of each indoor unit is detected in real time. The compressor frequency is adjusted according to the actual inlet pipe temperature and the target inlet pipe temperature to ensure the stability of the compressor output capacity. This achieves batch self-cleaning control of indoor units of multi-split air conditioners and improves the stability of self-cleaning of multi-split air conditioners.

[0208] Based on the above implementation scheme, this embodiment of the invention also provides a multi-split air conditioning control device, such as... Figure 8 As shown, Figure 8 This is a schematic diagram of an embodiment of the multi-split air conditioning control device provided in this application.

[0209] Multi-split air conditioning control equipment includes:

[0210] One or more processors;

[0211] Memory; and

[0212] One or more applications, wherein the applications are stored in memory and configured to be executed by a processor from the steps of the multi-split air conditioning control method in any of the embodiments described above.

[0213] Specifically, a multi-split air conditioning control device may include components such as a processor 1001 with one or more processing cores, a memory 1002 with one or more computer-readable storage media, a power supply 1003, and an input unit 1004. Those skilled in the art will understand that... Figure 8 The structure of the multi-split air conditioning control device shown does not constitute a limitation on the multi-split air conditioning control device. It may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein:

[0214] The processor 1001 is the central control unit of the multi-split air conditioning control device. It connects various parts of the device via interfaces and lines, and executes software programs and / or modules stored in the memory 1002, as well as calling data stored in the memory 1002, to perform various functions and process data, thereby providing overall monitoring of the multi-split air conditioning control device. It is understood that the processor 1001 communicates with the controller via signal transmission. Optionally, the processor 1001 may include one or more processing cores; preferably, the processor 1001 may integrate an application processor and a modem processor. The application processor primarily handles the operating system, user interface, and applications, while the modem processor primarily handles wireless communication. It is understood that the modem processor may not be integrated into the processor 1001.

[0215] The memory 1002 can be used to store software programs and modules. The processor 1001 executes various functional applications and data processing by running the software programs and modules stored in the memory 1002. The memory 1002 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, application programs required for at least one function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created based on the use of the multi-split air conditioning control device, etc. In addition, the memory 1002 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 1002 may also include a memory controller to provide the processor 1001 with access to the memory 1002.

[0216] In some embodiments of this application, the multi-split air conditioning control device can be implemented as a computer program, and the computer program can be implemented in, for example... Figure 6 The multi-split air conditioning control device shown is running. The memory of the multi-split air conditioning control device can store the various program modules that make up the multi-split air conditioning control unit, for example, Figure 5The diagram shows a first acquisition module 701, a determination module 702, a second acquisition module 703, and an adjustment module 704. The computer program comprised of these modules causes the processor to execute the steps in the control methods for multi-unit air conditioning control devices described in the various embodiments of this application.

[0217] For example, Figure 8 The multi-split air conditioning control device shown can be controlled by, for example Figure 7 The first acquisition module 701 in the multi-split air conditioning control device shown executes step S201. The multi-split air conditioning control device can execute step S202 through the determination module 702. The multi-split air conditioning control device can execute step S203 through the second acquisition module 703. The multi-split air conditioning control device can execute step S204 through the communication adjustment module 704. The multi-split air conditioning control device includes a processor, a memory, and a network interface connected via a system bus. The processor of the multi-split air conditioning control device provides computing and control capabilities. The memory of the multi-split air conditioning control device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The network interface of the multi-split air conditioning control device is used for communication with external multi-split air conditioning control devices via a network connection. When the computer program is executed by the processor, it implements a control method for the multi-split air conditioning control device.

[0218] The multi-split air conditioning control device also includes a power supply 1003 that supplies power to the various components. Preferably, the power supply 1003 can be logically connected to the processor 1001 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 1003 may also include one or more DC or AC power supplies, recharging systems, power fault detection circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0219] The multi-split air conditioning control device may also include an input unit 1004, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0220] Although not shown, the multi-split air conditioning control device may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 1001 in the multi-split air conditioning control device loads the executable files corresponding to the processes of one or more application programs into the memory 1002 according to the following instructions, and the processor 1001 runs the application programs stored in the memory 1002 to realize various functions, as follows:

[0221] Obtain the ambient temperature of the environment corresponding to each indoor unit in a multi-split air conditioner that needs to be cleaned;

[0222] The target inlet temperature is determined based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode of each indoor unit. The preset operating parameters include at least one of the set temperature, the opening degree of the electronic expansion valve, and the indoor fan speed.

[0223] The actual refrigerant inlet temperature of each indoor unit is obtained when the compressor in the multi-split air conditioner is running at the target inlet temperature.

[0224] The frequency of the compressor in the multi-split air conditioner is adjusted based on the actual inlet pipe temperature and the target inlet pipe temperature.

[0225] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0226] Therefore, embodiments of the present invention provide a computer-readable storage medium (hereinafter referred to as the storage medium), which may include: read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc. A computer program is stored thereon, and the computer program is loaded by a processor to execute the steps in any of the multi-split air conditioning control device control methods provided in the embodiments of the present invention. For example, the computer program loaded by the processor can execute the following steps:

[0227] Obtain the ambient temperature of the environment corresponding to each indoor unit in a multi-split air conditioner that needs to be cleaned;

[0228] The target inlet temperature is determined based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode of each indoor unit. The preset operating parameters include at least one of the set temperature, the opening degree of the electronic expansion valve, and the indoor fan speed.

[0229] The actual refrigerant inlet temperature of each indoor unit is obtained when the compressor in the multi-split air conditioner is running at the target inlet temperature.

[0230] The frequency of the compressor in the multi-split air conditioner is adjusted based on the actual inlet pipe temperature and the target inlet pipe temperature.

[0231] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the detailed descriptions of other embodiments above, which will not be repeated here.

[0232] In practice, each of the above units or structures can be implemented as an independent entity or can be arbitrarily combined to be implemented as the same or several entities. For the specific implementation of each of the above units or structures, please refer to the previous method embodiments, which will not be repeated here.

[0233] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0234] The above provides a detailed description of a multi-split air conditioning control method, apparatus, device, and storage medium provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for controlling a multi-split air conditioner, characterized in that, include: Obtain the ambient temperature of the environment corresponding to each indoor unit in a multi-split air conditioner that needs to be cleaned; The target inlet temperature is determined based on the indoor ambient temperature and the preset operating parameters of the self-cleaning mode of each indoor unit. The preset operating parameters include at least one of the set temperature, the opening degree of the electronic expansion valve, and the indoor fan speed. The actual refrigerant inlet temperature of each indoor unit is obtained when the compressor in the multi-split air conditioner is running at the target inlet temperature. The frequency of the compressor in the multi-split air conditioner is adjusted according to the actual inlet pipe temperature and the target inlet pipe temperature. The step of determining the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the corresponding self-cleaning mode of each indoor unit includes: The set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode are obtained. The target set temperature is determined based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature. The target inlet pipe temperature is obtained by combining the target set temperature, the average speed of the indoor fan, the average opening of the electronic expansion valve, and the average ambient temperature.

2. The multi-split air conditioning control method according to claim 1, characterized in that, Determining the target set temperature based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature includes: For each indoor unit, a temperature difference value is determined based on the set temperature and the indoor ambient temperature, and the indoor ambient temperature is corrected based on the temperature difference value. The temperature-corrected indoor ambient temperature is summed to obtain the first temperature, and the temperature difference values ​​corresponding to each indoor unit are summed to obtain the second temperature. Calculate the ratio of the first temperature to the second temperature to obtain the target set temperature.

3. The multi-split air conditioning control method according to claim 1, characterized in that, The process of obtaining the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in its corresponding self-cleaning mode includes: Obtain the status parameters of each indoor unit, including any one of the following: self-cleaning operation time, indoor heat exchanger frost thickness, and indoor heat exchanger temperature. If the state parameters meet the operating conditions for the self-cleaning condensation stage or the self-cleaning frosting stage, then the set temperature, electronic expansion valve opening, and indoor fan speed of each indoor unit in the corresponding self-cleaning mode are obtained.

4. The multi-split air conditioning control method according to claim 1, characterized in that, The step of adjusting the frequency of the compressor in the multi-split air conditioner based on the actual inlet pipe temperature and the target inlet pipe temperature includes: The actual inlet temperature is averaged to obtain the average actual inlet temperature. The frequency adjustment parameters are determined based on the deviation between the actual average inlet temperature and the target inlet temperature. The compressor frequency is adjusted according to the frequency adjustment parameters.

5. The multi-split air conditioning control method according to any one of claims 1-4, characterized in that, The process of obtaining the indoor ambient temperature of each indoor unit to be cleaned in a multi-split air conditioner includes: Receive self-cleaning requests from indoor units in a multi-split air conditioner; Based on the indoor unit identifier carried in the self-cleaning request, the indoor units that sent the self-cleaning request are screened to determine the indoor units to be cleaned. The system broadcasts a self-cleaning condensation stage control command to the indoor unit and receives the indoor ambient temperature feedback from each indoor unit.

6. The multi-split air conditioning control method according to claim 5, characterized in that, Before filtering indoor units that sent self-cleaning requests based on the indoor unit identifier carried in the self-cleaning request to determine the indoor unit to be cleaned, the process further includes: Obtain version information for the self-cleaning function of the indoor unit in a multi-split air conditioner; Based on the correspondence between the version information and the preset version information, determine the indoor unit that is compatible with self-cleaning; Assign self-cleaning identification information to the indoor units that are compatible with self-cleaning, so as to control the determination of the indoor unit to be cleaned based on the self-cleaning identification information.

7. A multi-split air conditioning control device, characterized in that, The device includes: First acquisition module: used to acquire the indoor ambient temperature of each indoor unit to be cleaned in a multi-split air conditioner; Determining module: used to determine the target inlet pipe temperature based on the indoor ambient temperature and the preset operating parameters of the corresponding self-cleaning mode of each indoor unit, wherein the preset operating parameters include at least one of the set temperature, the opening degree of the electronic expansion valve and the indoor fan speed; The second acquisition module is used to acquire the actual refrigerant input temperature of each indoor unit when the compressor in the multi-split air conditioner is running at the target inlet pipe temperature. Adjustment module: used to control the frequency of the compressor in the multi-split air conditioner to be adjusted according to the actual inlet pipe temperature and the target inlet pipe temperature; The determining module is used to: obtain the set temperature, electronic expansion valve opening and indoor fan speed of each indoor unit in the corresponding self-cleaning mode; The target set temperature is determined based on the indoor ambient temperature and the temperature difference between the indoor ambient temperature and the set temperature. The target inlet pipe temperature is obtained by combining the target set temperature, the average speed of the indoor fan, the average opening of the electronic expansion valve, and the average ambient temperature.

8. A multi-split air conditioning control device, characterized in that, The multi-split air conditioning control device includes: One or more processors; Memory; and One or more applications, wherein the one or more applications are stored in the memory and configured to be executed by the processor to implement the steps of the multi-split air conditioning control method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, It stores a computer program, which is loaded by a processor to execute the steps of the multi-split air conditioning control method according to any one of claims 1 to 6.

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