Multi-split air conditioner regulation and control method and device, storage medium and multi-split air conditioner

Abstract

The invention discloses a multi-split air conditioner regulation and control method and device, a storage medium and a multi-split air conditioner, and relates to the technical field of air conditioners, the method comprises the steps that when the operation efficiency of a target outdoor unit module meets a preset rotation condition, candidate outdoor unit modules are determined from multiple outdoor unit modules, and the target outdoor unit module refers to an outdoor unit module in operation; obtaining a prediction system operation parameter of the switching candidate outdoor unit module, and performing calculation and analysis according to the prediction system operation parameter to obtain a module distribution coefficient; according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient and the complete machine demand capacity of the multi-split air conditioner, a module energy efficiency interval is determined; and controlling the target outdoor unit module and the candidate outdoor unit module to perform start-stop switching according to the module energy efficiency interval. The system energy efficiency of the multi-split air conditioner can be effectively improved, and the overall service life is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of air conditioners, and particularly to a control method, device, storage medium, and multi-connected air conditioner for a multi-connected air conditioner. Background Art

[0002] Multi-connected air conditioners are widely used in air conditioning of various building spaces. Their outdoor units are usually composed of multiple outdoor unit modules. During actual operation, due to factors such as individual differences in compressors, cumulative operation time, and operating condition changes of different outdoor unit modules, their operating efficiencies will vary.

[0003] The operating modes of the outdoor unit modules of traditional multi-connected air conditioners often lack a scientific and effective module rotation strategy, resulting in some outdoor unit modules being in a high-load and low-efficiency operating state for a long time, while the utilization rate of some outdoor unit modules is insufficient. This not only affects the system energy efficiency of the entire multi-connected air conditioner but may also shorten the overall service life of the multi-connected air conditioner due to the overuse of some outdoor unit modules. Summary of the Invention

[0004] Embodiments of this application provide an air conditioner control solution that can effectively improve the system energy efficiency of a multi-connected air conditioner and extend the overall service life.

[0005] Embodiments of this application provide the following technical solutions:

[0006] According to an embodiment of this application, a control method for a multi-connected air conditioner, the multi-connected air conditioner includes a plurality of outdoor unit modules, and the method includes: when the operating efficiency of a target outdoor unit module meets a preset rotation condition, determining a candidate outdoor unit module from the plurality of outdoor unit modules, where the target outdoor unit module refers to the operating outdoor unit module; obtaining predicted system operating parameters for switching the candidate outdoor unit module, and performing calculation and analysis based on the predicted system operating parameters to obtain a module distribution coefficient; determining a module energy efficiency interval according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall demand capacity of the multi-connected air conditioner; and controlling the start and stop switching of the target outdoor unit module and the candidate outdoor unit module according to the module energy efficiency interval.

[0007] In some embodiments of this application, the determining a module energy efficiency interval according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall demand capacity of the multi-connected air conditioner includes: if K M ×Cb1-rating<Qa-outdoor≤(Cb1-rating+Cb2-rating), then determining the module energy efficiency interval as the first module energy efficiency interval; if K M×Cb1 - rating < Qa - outdoor ≤ (K M - K1) × (Cb1 - rating + Cb2 - rating), then determine that the module energy efficiency range is the second module energy efficiency range; if 0 < Qa - outdoor ≤ (K M - K2) × (Cb1 - rating), then determine that the module energy efficiency range is the third module energy efficiency range; where K M refers to the module distribution coefficient, Cb1 - rating refers to the module rated capacity of the target outdoor unit module, Cb2 - rating refers to the module rated capacity of the candidate outdoor unit module, Qa - outdoor refers to the whole machine demand capacity, and K1 and K2 are respectively predetermined parameter values.

[0008] In some embodiments of the present application, controlling the start - stop switching of the target outdoor unit module and the candidate outdoor unit module according to the module energy efficiency range includes: when the module energy efficiency range is the first module energy efficiency range, controlling the target outdoor unit module to operate and the candidate outdoor unit module to stop operating; when the module energy efficiency range is the second module energy efficiency range, controlling the target outdoor unit module and the candidate outdoor unit module to maintain the original state; when the module energy efficiency range is the third module energy efficiency range, controlling the target outdoor unit module to operate and the candidate outdoor unit module to operate.

[0009] In some embodiments of the present application, the target outdoor unit module includes a first compressor and a second compressor; the method further includes: collecting the operating parameters of the first compressor in the target outdoor unit module; performing calculation and analysis according to the operating parameters of the compressor to obtain a compressor performance score; determining a start - stop switching coefficient according to the compressor performance score; determining a compressor energy efficiency range according to the rated capacity of the first compressor, the start - stop switching coefficient, and the module distribution capacity of the target outdoor unit module; controlling the start - stop switching of the first compressor and the second compressor in the target outdoor unit module according to the compressor energy efficiency range.

[0010] In some embodiments of the present application, determining the compressor energy efficiency range according to the rated capacity of the first compressor, the start - stop switching coefficient, and the module distribution capacity of the target outdoor unit module includes: if C1 × K Y < C M , then determine that the compressor energy efficiency range is the first compressor energy efficiency range; if C1 × K Y - K3 < C M ≤ C1 × Kmax, then determine that the compressor energy efficiency range is the second compressor energy efficiency range; if 0 < C M ≤ C1 × K Y-K3, then determine that the compressor energy efficiency range is the third compressor energy efficiency range; where C1 refers to the rated capacity of the compressor of the first compressor, and K Y refers to the start-stop switching coefficient, and C M refers to the module allocation capacity of the target outdoor unit module, Kmax refers to the start-stop upper limit coefficient of the target outdoor unit module, and K3 is a predetermined parameter value.

[0011] In some embodiments of the present application, the controlling the start-stop switching of the first compressor and the second compressor in the target outdoor unit module according to the compressor energy efficiency range includes: when the compressor energy efficiency range is the first compressor energy efficiency range, controlling the first compressor to run and the second compressor to stop running; when the compressor energy efficiency range is the second compressor energy efficiency range, controlling the first compressor and the second compressor to maintain their original states; when the compressor energy efficiency range is the third compressor energy efficiency range, controlling the first compressor to run and the second compressor to run.

[0012] In some embodiments of the present application, after determining the start-stop switching coefficient according to the compressor performance score, the method further includes: receiving the actual operating power of the first compressor; calculating the theoretical operating power of the first compressor according to the compressor operating parameters of the first compressor; correcting the compressor performance score according to the deviation value between the actual operating power and the theoretical operating power; and updating the start-stop switching coefficient according to the corrected compressor performance score.

[0013] According to an embodiment of the present application, a multi-connected air conditioner control device includes: a memory storing a computer program; a processor reading the computer program stored in the memory to execute the method described in the embodiments of the present application.

[0014] According to another embodiment of the present application, a storage medium stores a computer program, and when the computer program is executed by a processor of a multi-connected air conditioner control device, the computer is enabled to execute the method described in the embodiments of the present application.

[0015] According to another embodiment of the present application, a heat pump device may include a multi-connected air conditioner control device.

[0016] According to another embodiment of the present application, a computer program product or a computer program includes computer instructions stored in a computer-readable storage medium. A processor of a multi-connected air conditioner control device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the multi-connected air conditioner control device executes the methods provided in the various optional implementation manners described in the embodiments of the present application.

[0017] In the embodiments of the present application, when the operating efficiency of the target outdoor unit module meets the preset rotation condition, a candidate outdoor unit module is determined from multiple outdoor unit modules, and the target outdoor unit module refers to the operating outdoor unit module; the predicted system operating parameters for switching the candidate outdoor unit module are obtained, and calculation and analysis are performed based on the predicted system operating parameters to obtain a module distribution coefficient; according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall demand capacity of the multi-split air conditioner, a module energy efficiency range is determined; and the start-stop switching of the target outdoor unit module and the candidate outdoor unit module is controlled according to the module energy efficiency range.

[0018] In this way of the embodiments of the present application, when the operating efficiency of the target outdoor unit module meets the preset rotation condition, a candidate outdoor unit module is determined and the module distribution coefficient is calculated and analyzed based on the predicted system operating parameters of the candidate outdoor unit module. Further, according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall demand capacity of the multi-split air conditioner, a module energy efficiency range is determined, and the start-stop switching of the target outdoor unit module and the candidate outdoor unit module is controlled according to this module energy efficiency range, which can effectively improve the system energy efficiency of the multi-split air conditioner and extend the overall service life. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.

[0020] Figure 1 Shows a flowchart of a multi-split air conditioner control method according to an embodiment of the present application.

[0021] Figure 2 Shows a compressor switching flowchart according to an embodiment of the present application.

[0022] Figure 3 Shows a start-stop switching coefficient calculation flowchart according to an embodiment of the present application.

[0023] Figure 4 Shows a block diagram of a multi-split air conditioner control device according to an embodiment of the present application.

[0024] Figure 5 Shows a block diagram of a multi-split air conditioner according to an embodiment of the present application. Detailed Embodiments

[0025] The present disclosure will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments provided herein are only used to explain the present disclosure and are not used to limit the present disclosure. In addition, the embodiments provided below are partial embodiments for implementing the present disclosure, rather than all embodiments for implementing the present disclosure. Without conflict, the technical solutions described in the embodiments of the present disclosure can be implemented in any combination.

[0026] It should be noted that in the embodiments of the present disclosure, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a method or device including a series of elements not only includes the elements clearly recited, but also includes other elements not explicitly listed, or elements inherent to the implementation of the method or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of other related elements in the method or device including the element (such as steps in the method or units in the device, and the unit can be part of a circuit, part of a processor, part of a program or software, etc.).

[0027] For example, the multi-split air conditioner control method provided in the embodiments of the present disclosure includes a series of steps, but the multi-split air conditioner control method provided in the embodiments of the present disclosure is not limited to the recited steps. Similarly, the multi-split air conditioner control device provided in the embodiments of the present disclosure includes a series of units, but the device provided in the embodiments of the present disclosure is not limited to including the explicitly recited units, and may also include units required for obtaining relevant information or processing based on information.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this disclosure belongs. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure.

[0029] It can be understood that in the specific implementation of this application, when it comes to relevant data, when the embodiments in this application are applied to specific products or technologies, user permission or consent is required, and the collection, use, and processing of relevant data need to comply with relevant laws, regulations, and standards.

[0030] Figure 1 The flowchart of the multi-split air conditioner control method according to an embodiment of the present application is schematically shown. The execution subject of the multi-split air conditioner control method can be a multi-split air conditioner control device with processing capabilities, and the multi-split air conditioner control device can be set in devices such as multi-split air conditioners, mobile phones, computers, smart watches, and other household appliances. The multi-split air conditioner control device can at least include a memory and a processor.

[0031] In a specific embodiment of the present application, the multi-connected air conditioner control device, which is the execution subject of the multi-connected air conditioner control method, is specifically arranged in the multi-connected air conditioner. The multi-connected air conditioner control device may include a processor and a memory. A computer program is stored in the memory, and the processor can read the computer program stored in the memory to execute the methods of the embodiments of the present application.

[0032] Among them, the outdoor unit of the multi-connected air conditioner may include multiple (i.e., at least two) outdoor unit modules, and each outdoor unit module may include a first compressor and a second compressor.

[0033] As Figure 1 shown, the multi-connected air conditioner control method of the embodiments of the present application may include steps S110 to S140.

[0034] Step S110, when the operating efficiency of the target outdoor unit module meets the preset rotation condition, determine the candidate outdoor unit modules from the multiple outdoor unit modules, where the target outdoor unit module refers to the operating outdoor unit module;

[0035] Step S120, obtain the predicted system operating parameters for switching the candidate outdoor unit modules, and perform calculation and analysis based on the predicted system operating parameters to obtain the module allocation coefficient;

[0036] Step S130, determine the module energy efficiency range according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit modules, the module allocation coefficient, and the total machine demand capacity of the multi-connected air conditioner;

[0037] Step S140, control the start and stop switching of the target outdoor unit module and the candidate outdoor unit modules according to the module energy efficiency range.

[0038] The operating outdoor unit module among the multiple outdoor unit modules is used as the target outdoor unit module, and it is monitored whether the operating efficiency of the target outdoor unit module meets the preset rotation condition. Among them, the operating efficiency can be calculated based on the actual operating parameters (such as cooling capacity and input power, etc.) of the target outdoor unit module. In addition, when the operating efficiency of the target outdoor unit module is lower than the predetermined efficiency or the operating efficiency difference between multiple target outdoor unit modules exceeds the predetermined range, it is determined that the operating efficiency of the target outdoor unit module meets the preset rotation condition.

[0039] When the operating efficiency of the target outdoor unit module meets the preset rotation condition, a module rotation decision is triggered, and then one or several outdoor unit modules are determined from the multiple outdoor unit modules as the candidate outdoor unit modules participating in the rotation. For example, one or several outdoor unit modules can be selected from the multiple outdoor unit modules as the candidate outdoor unit modules participating in the rotation according to the compliance requirements of the multi-connected air conditioner (such as building load) and the parameters of each outdoor unit module (such as rated capacity or operating efficiency, etc.).

[0040] Further, for a candidate outdoor unit module, first obtain the predicted system operating parameters for switching the candidate outdoor unit module. The predicted system operating parameters are the estimated operating parameters of the multi-connected air conditioner for switching the candidate outdoor unit module (for example, turning off and turning on the candidate outdoor unit module); then, perform calculation and analysis based on the predicted system operating parameters to obtain the module allocation coefficient.

[0041] Determine the module energy efficiency range when the target outdoor unit module and the candidate outdoor unit module work together according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module allocation coefficient, and the total demand capacity of the multi-connected air conditioner. Among them, the total demand capacity of the multi-connected air conditioner is the sum of the demand capacities of all indoor units in the multi-connected air conditioner.

[0042] Control the start and stop switching of the target outdoor unit module and the candidate outdoor unit module according to the module energy efficiency range, which can make the multi-connected air conditioner always maintain a high operating efficiency state, reduce the overall system energy consumption, and avoid some outdoor unit modules from being in a high-load and low-efficiency operating state for a long time. Subsequently, the system energy efficiency of the multi-connected air conditioner can be effectively improved and the overall service life can be extended.

[0043] In summary, in the manner of this embodiment of the present application, when the operating efficiency of the target outdoor unit module meets the preset rotation condition, determine the candidate outdoor unit module and calculate and analyze the module allocation coefficient according to the predicted system operating parameters of the candidate outdoor unit module. Further, determine the module energy efficiency range according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module allocation coefficient, and the total demand capacity of the multi-connected air conditioner, and control the start and stop switching of the target outdoor unit module and the candidate outdoor unit module according to the module energy efficiency range, which can effectively improve the system energy efficiency of the multi-connected air conditioner and extend the overall service life.

[0044] The following description Figure 1 Specific embodiments that are further optional under each step when performing multi-connected air conditioner regulation in the embodiment.

[0045] In one embodiment, in step S120, obtaining the predicted system operating parameters for switching the candidate outdoor unit module may include: querying the predicted system operating parameters from a preset parameter table according to the rated module capacities of both the candidate outdoor unit module and the target outdoor unit module.

[0046] Further, in an embodiment of the present application, in step S120, obtaining the predicted system operating parameters of the switching candidate outdoor unit module may include: determining the preliminary compressor frequency for starting the operation of the candidate outdoor unit module according to the module parameters of the candidate outdoor unit module; taking the sum of the ambient temperature and the predetermined temperature value as the predicted system high pressure; taking the product of the indoor unit startup capacity ratio and the low pressure value of the target outdoor unit module as the predicted system low pressure; the predicted system operating parameters may include the preliminary compressor frequency, the predicted system high pressure, and the predicted system low pressure.

[0047] The module parameters may include the module capacity of the candidate outdoor unit module (such as the rated cooling capacity or heating capacity, etc.) and parameters such as the model of the first compressor in the candidate outdoor unit module. The preliminary compressor frequency corresponding to the module parameters can be queried from the preset predicted frequency table, and thus the preliminary compressor frequency can be determined as the preliminary compressor frequency for starting the operation of the candidate outdoor unit module.

[0048] In addition, the predetermined temperature value can be set according to the actual situation. For example, the predetermined temperature value can be equal to 15 °C, and the sum of the ambient temperature and the predetermined temperature value is taken as the predicted system high pressure. Further, the product of the indoor unit startup capacity ratio and the low pressure value of the target outdoor unit module is taken as the predicted system low pressure. Among them, the indoor unit startup capacity ratio can be the ratio of the capacity of the started outdoor units in a multi-connected air conditioner to the total demand capacity of the indoor units in the multi-connected air conditioner, and the low pressure value of the target outdoor unit module can be detected by a low pressure sensor in the target outdoor unit module.

[0049] Taking the preliminary compressor frequency, the predicted system high pressure, and the predicted system low pressure obtained in the manner of this embodiment as the predicted system operating parameters and using these predicted system operating parameters to calculate and analyze the module distribution coefficient can further reliably ensure that the multi-connected air conditioner always maintains a high operating efficiency state.

[0050] Further, in an embodiment, the predicted system operating parameters may include the preliminary compressor frequency, the predicted system high pressure, the predicted system low pressure, and the cumulative operating duration of the candidate outdoor unit module. Furthermore, this embodiment can further consider the cumulative operating duration of the candidate outdoor unit module to calculate and analyze the module distribution coefficient, which can further reliably avoid the candidate outdoor unit module from being in a high-load and low-efficiency operating state for a long time.

[0051] Further, in an embodiment, in step S120, calculating and analyzing according to the predicted system operating parameters to obtain the module distribution coefficient may include: calculating the system operating performance score based on the predicted system operating parameters; determining the module distribution coefficient according to the system operating performance score.

[0052] For example, a ten - coefficient model can be used to calculate the system operation performance score using the predicted system operation parameters. The system operation performance score can reflect the comprehensive performance characteristics of the multi - split air conditioner when operating under the predicted system operation parameters. Further, the module allocation coefficient corresponding to the system operation performance score can be queried from the preset model allocation coefficient table.

[0053] In one embodiment, the target outdoor unit module includes a first compressor and a second compressor; referring to Figure 2 , the multi - split air conditioner control method according to the embodiment of the present application may further include: Step S210, collecting the compressor operation parameters of the first compressor in the target outdoor unit module; Step S220, performing calculation and analysis based on the compressor operation parameters to obtain the compressor performance score; Step S230, determining the start - stop switching coefficient according to the compressor performance score; Step S240, determining the compressor energy - efficiency interval according to the rated capacity of the first compressor, the start - stop switching coefficient, and the module allocation capacity of the target outdoor unit module; Step S250, controlling the start - stop switching of the first compressor and the second compressor in the target outdoor unit module according to the compressor energy - efficiency interval.

[0054] For the first compressor operating in the target outdoor unit module, the compressor operation parameters of the first compressor can be collected. The compressor operation parameters of the first compressor may include, but are not limited to, suction pressure, discharge pressure, suction temperature, discharge temperature, compressor speed, refrigerant flow rate, etc.

[0055] Performing calculation and analysis based on the compressor operation parameters to obtain the compressor performance score, which can reflect the comprehensive performance characteristics of the first compressor. Among them, in one specific implementation, a ten - coefficient model can be used to perform calculations using the compressor operation parameters, and the calculated ten - coefficient value is used as the compressor performance score. Using the ten - coefficient value as the compressor performance score can further improve the accuracy of the compressor performance score.

[0056] According to the compressor performance score, the start - stop switching coefficient matching the compressor performance score can be queried and determined from the preset start - stop switching coefficient table; according to the rated capacity of the first compressor, the start - stop switching coefficient, and the module allocation capacity of the target outdoor unit module, the compressor energy - efficiency interval is determined, where the module allocation capacity refers to the capacity allocated to the target outdoor unit module in the multi - split air conditioner.

[0057] Controlling the start - stop switching of the first compressor and the second compressor in the target outdoor unit module according to the compressor energy - efficiency interval can further ensure that the target outdoor unit module always maintains a high operating efficiency state, and overall further improve the overall system energy efficiency of the multi - split air conditioner.

[0058] Reasonably dividing the compressor energy efficiency range can reliably ensure that the target outdoor unit module always maintains a high operating efficiency state. Optionally, in some embodiments, determining the compressor energy efficiency range according to the rated capacity of the compressor of the first compressor, the start-stop switching coefficient, and the module allocation capacity of the target outdoor unit module may include: querying from a preset compressor energy efficiency range table the compressor energy efficiency range that matches the rated capacity of the compressor of the first compressor, the start-stop switching coefficient, and the module allocation capacity of the target outdoor unit module.

[0059] Furthermore, in an embodiment of the present application, determining the compressor energy efficiency range according to the rated capacity of the compressor of the first compressor, the start-stop switching coefficient, and the module allocation capacity of the target outdoor unit module may specifically include:

[0060] If C1×K Y <C M , then determine that the compressor energy efficiency range is the first compressor energy efficiency range; if C1×K Y -K3<C M ≤C1×Kmax, then determine that the compressor energy efficiency range is the second compressor energy efficiency range; if 0<C M ≤C1×K Y -K3, then determine that the compressor energy efficiency range is the third compressor energy efficiency range; where C1 refers to the rated capacity of the compressor of the first compressor, K Y refers to the start-stop switching coefficient, C M refers to the module allocation capacity of the target outdoor unit module, Kmax refers to the start-stop upper limit coefficient of the target outdoor unit module, and K3 is a predetermined parameter value.

[0061] In this embodiment, according to C1×K Y <C M , C1×K Y -K3<C M ≤C1×Kmax, and 0<C M ≤C1×K Y -K3 to divide the first compressor energy efficiency range, the second compressor energy efficiency range, and the third compressor energy efficiency range. The applicant has found that in this way, the compressor energy efficiency range can be further reasonably divided. When controlling the start-stop switching of the first compressor and the second compressor according to the first compressor energy efficiency range, the second compressor energy efficiency range, and the third compressor energy efficiency range, it can be further reliably ensured that the target outdoor unit module always maintains a high operating efficiency state. Among them, in a specific implementation manner, K3 is equal to 0.1; it can be understood that in other implementation manners, the value of K3 can be set according to the actual situation.

[0062] Based on the division of the first compressor energy efficiency interval, the second compressor energy efficiency interval, and the third compressor energy efficiency interval, in an embodiment of the present application, the start-stop switching of the first compressor and the second compressor in the target outdoor unit module is controlled according to the compressor energy efficiency interval, which may specifically include:

[0063] When the compressor energy efficiency interval is the first compressor energy efficiency interval, control the first compressor to run and the second compressor to stop running; when the compressor energy efficiency interval is the second compressor energy efficiency interval, control the first compressor and the second compressor to maintain their original states; when the compressor energy efficiency interval is the third compressor energy efficiency interval, control the first compressor to run and the second compressor to run.

[0064] In this embodiment, as shown in the following table, when the compressor energy efficiency interval is the first compressor energy efficiency interval, the first compressor "runs" and the second compressor "stops running"; when the compressor energy efficiency interval is the second compressor energy efficiency interval, the first compressor and the second compressor "maintain their original states", and maintaining the original state means maintaining the running state of the compressor before the compressor energy efficiency interval is the second compressor energy efficiency interval; when the compressor energy efficiency interval is the third compressor energy efficiency interval, the first compressor "runs" and the second compressor "runs".

[0065]

[0066] When dividing the first compressor energy efficiency interval, the second compressor energy efficiency interval, and the third compressor energy efficiency interval according to C1×K Y <C M 、C1×K Y -K3<C M ≤C1×Kmax and 0<C M ≤C1×K Y -K3, and controlling the start-stop switching of the first compressor and the second compressor in this implementation manner can further reliably ensure that the target outdoor unit module always maintains a high operating efficiency state.

[0067] Further, in an embodiment, referring to Figure 3 , after determining the start-stop switching coefficient according to the compressor performance score, the multi-line air conditioner control method of the embodiment of the present application may further include:

[0068] Step S310, receiving the actual operating power of the first compressor; step S320, calculating the theoretical operating power of the first compressor according to the compressor operating parameters of the first compressor; step S330, correcting the compressor performance score according to the deviation value between the actual operating power and the theoretical operating power; step S340, updating the start-stop switching coefficient according to the corrected compressor performance score.

[0069] The actual operating power of the first compressor can be collected through the compressor drive module, and the theoretical operating power of the first compressor can be calculated based on the compressor operating parameters of the first compressor collected in real time. For example, using a ten-factor model, the theoretical operating power of the first compressor can be obtained by fitting and calculating with the compressor operating parameters of the first compressor.

[0070] The deviation value between the actual operating power and the theoretical operating power (i.e., the difference between the actual operating power and the theoretical operating power) can reflect the accuracy of the compressor performance score calculated above. The compressor performance score is corrected according to this deviation value, and the start-stop switching coefficient is updated according to the corrected compressor performance score. Using the updated start-stop switching coefficient to determine the compressor energy efficiency interval can further reliably ensure that the target outdoor unit module always maintains a high operating efficiency state.

[0071] Among them, correcting the compressor performance score according to the deviation value between the actual operating power and the theoretical operating power can be: when the deviation value is greater than the predetermined deviation, the correction coefficient corresponding to the deviation value can be determined from the preset correction coefficient identifier according to the deviation value, and the correction coefficient is multiplied by the compressor performance score calculated above to obtain the corrected compressor performance score.

[0072] Updating the start-stop switching coefficient according to the corrected compressor performance score can be: querying and determining the start-stop switching coefficient matching the corrected compressor performance score from the preset start-stop switching coefficient table, and the start-stop switching coefficient matching the corrected compressor performance score is the updated start-stop switching coefficient.

[0073] Furthermore, reasonably dividing the module energy efficiency interval can reliably ensure that the multi-split air conditioner always maintains a high operating efficiency state and avoid some outdoor unit modules from being in a high-load and low-efficiency operating state for a long time. Optionally, in some embodiments, determining the module energy efficiency interval according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall machine demand capacity of the multi-split air conditioner may include: querying from the preset module energy efficiency interval table the module energy efficiency interval matching the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall machine demand capacity of the multi-split air conditioner.

[0074] Furthermore, in an embodiment of the present application, in step S130, determining the module energy efficiency interval according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall machine demand capacity of the multi-split air conditioner may specifically include:

[0075] If K MIf ×Cb1-rating<Qa-outdoor≤(Cb1-rating+Cb2-rating), then determine that the module energy efficiency range is the first module energy efficiency range; if K M ×Cb1-rating<Qa-outdoor≤(K M -K1)×(Cb1-rating+Cb2-rating), then determine that the module energy efficiency range is the second module energy efficiency range; if 0<Qa-outdoor≤(K M -K2)×(Cb1-rating), then determine that the module energy efficiency range is the third module energy efficiency range; where K M refers to the module allocation coefficient, Cb1-rating refers to the module rated capacity of the target outdoor unit module, Cb2-rating refers to the module rated capacity of the candidate outdoor unit module, Qa-outdoor refers to the whole machine demand capacity, and K1 and K2 are respectively predetermined parameter values.

[0076] In this embodiment, according to K M ×Cb1-rating<Qa-outdoor≤(Cb1-rating+Cb2-rating), K M ×Cb1-rating<Qa-outdoor≤(K M -K1)×(Cb1-rating+Cb2-rating), and 0<Qa-outdoor≤(K M -K2)×(Cb1-rating) to divide the first module energy efficiency range, the second module energy efficiency range, and the third module energy efficiency range. The applicant finds that in this way, the module energy efficiency range can be further reasonably divided. When controlling the start-stop switching of the target outdoor unit module and the candidate outdoor unit module according to the first module energy efficiency range, the second module energy efficiency range, and the third module energy efficiency range, it can be further reliably ensured that the multi-connected air conditioner always maintains a high operating efficiency state and avoids some outdoor unit modules from being in a high-load and low-efficiency operating state for a long time. Among them, in a specific embodiment, K1 is equal to 0.1 and K2 is equal to 0.2; it can be understood that in other embodiments, the magnitudes of K1 and K2 can be set according to actual situations.

[0077] On the basis of dividing the first module energy efficiency range, the second module energy efficiency range, and the third module energy efficiency range, in an embodiment of the present application, in step S140, controlling the start-stop switching of the target outdoor unit module and the candidate outdoor unit module according to the module energy efficiency range may include:

[0078] When the module energy efficiency interval is the first module energy efficiency interval, control the target outdoor unit module to run and the candidate outdoor unit module to stop running; when the module energy efficiency interval is the second module energy efficiency interval, control the target outdoor unit module and the candidate outdoor unit module to maintain their original states; when the module energy efficiency interval is the third module energy efficiency interval, control the target outdoor unit module to run and the candidate outdoor unit module to run.

[0079] In this embodiment, as shown in the following table, when the module energy efficiency interval is the first module energy efficiency interval, the target outdoor unit module "runs" and the candidate outdoor unit module "stops running"; when the module energy efficiency interval is the second module energy efficiency interval, the target outdoor unit module and the candidate outdoor unit module "maintain their original states"; when the module energy efficiency interval is the third module energy efficiency interval, the target outdoor unit module "runs" and the candidate outdoor unit module "runs".

[0080]

[0081] At K M ×Cb1-rating < Qa-outdoor ≤ (Cb1-rating + Cb2-rating), K M ×Cb1-rating < Qa-outdoor ≤ (K M -K1) × (Cb1-rating + Cb2-rating) and 0 < Qa-outdoor ≤ (K M -K2) × (Cb1-rating), on the basis of dividing the first module energy efficiency interval, the second module energy efficiency interval, and the third module energy efficiency interval, controlling the start-stop switching of the target outdoor unit module and the candidate outdoor unit module in this implementation manner can further reliably ensure that the multi-connected air conditioner always maintains a high operating efficiency state and avoid some outdoor unit modules from being in a high-load and low-efficiency operating state for a long time.

[0082] In addition, the embodiment of the present application also provides a multi-connected air conditioner control device. As Figure 4 shown, Figure 4 The block diagram of the multi-connected air conditioner control device according to an embodiment of the present application is shown. Specifically: the multi-connected air conditioner control device 400 may include a processor 401 with one or more processing cores and a memory 402 with one or more computer-readable storage media.

[0083] The processor 401 may, according to instructions, load the executable files corresponding to the processes of one or more computer programs into the memory 402, and the processor 401 runs the computer programs stored in the memory 402 to implement various functions in the embodiments of the multi-connected air conditioner control method described above.

[0084] For example, the processor 401 may perform the following steps:

[0085] When the operating efficiency of the target outdoor unit module meets the preset rotation condition, determine the candidate outdoor unit modules from multiple outdoor unit modules, where the target outdoor unit module refers to the operating outdoor unit module; obtain the predicted system operating parameters for switching the candidate outdoor unit modules, and perform calculation and analysis based on the predicted system operating parameters to obtain the module allocation coefficient; determine the module energy efficiency range according to the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit modules, the module allocation coefficient, and the total machine demand capacity of the multi-split air conditioner; control the start and stop switching of the target outdoor unit module and the candidate outdoor unit modules according to the module energy efficiency range.

[0086] Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above embodiments can be completed by a computer program, or by controlling related hardware through a computer program. The computer program can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0087] Therefore, an embodiment of the present application further provides a storage medium, in which a computer program is stored, and the computer program can be loaded by a processor to execute the steps in any method provided by the embodiments of the present application.

[0088] Wherein, the storage medium may be a computer-readable storage medium, and the storage medium may include: read-only memory (ROM, Read Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc.

[0089] Since the computer program stored in the storage medium can execute the steps in any method provided by the embodiments of the present application, the beneficial effects that can be achieved by the methods provided by the embodiments of the present application can be realized. For details, see the previous embodiments and will not be repeated here.

[0090] In addition, referring to Figure 5 , an embodiment of the present application further provides an air conditioner. The multi-split air conditioner 500 may include a multi-split air conditioner control device 400 as shown in Figure 4 and other modules 600 (such as an evaporator, a compressor, etc.).

[0091] According to another embodiment of the present application, a computer program product or a computer program includes computer instructions stored in a computer-readable storage medium. A processor of the multi-connected air conditioner control device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions to cause the multi-connected air conditioner control device to execute the methods provided in the various alternative implementations described in the embodiments of the present application.

[0092] Those skilled in the art will readily conceive of other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include well-known common general knowledge or conventional technical means in the technical field not disclosed in the present application.

[0093] It should be understood that the present application is not limited to the embodiments described above and shown in the drawings, but various modifications and changes can be made without departing from its scope.

Claims

1. A multi-connected air conditioner control method, characterized in that, The multi-connected air conditioner includes a plurality of outdoor unit modules, and the method includes: When the operating efficiency of the target outdoor unit module meets the preset rotation condition, determining a candidate outdoor unit module from the plurality of outdoor unit modules, where the target outdoor unit module refers to the operating outdoor unit module; Obtaining the predicted system operating parameters for switching the candidate outdoor unit module, and performing calculation and analysis based on the predicted system operating parameters to obtain a module distribution coefficient; Determining a module energy efficiency range based on the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall machine demand capacity of the multi-connected air conditioner; Controlling the start / stop switching of the target outdoor unit module and the candidate outdoor unit module according to the module energy efficiency range.

2. The method according to claim 1, wherein The determining the module energy efficiency range based on the module rated capacity of the target outdoor unit module, the module rated capacity of the candidate outdoor unit module, the module distribution coefficient, and the overall machine demand capacity of the multi-connected air conditioner includes: If K M ×Cb1-rating < Qa-outdoor ≤ (Cb1-rating + Cb2-rating), then determine that the module energy efficiency range is the first module energy efficiency range; If K M ×Cb1 - rating < Qa - outdoor ≤ (K M - K1) × (Cb1 - rating + Cb2 - rating), then determine that the energy efficiency range of the module is the second module energy efficiency range; If 0 < Qa - outdoor ≤ (K M - K2) × (Cb1 - rating), then determine that the energy efficiency range of the module is the third energy efficiency range of the module; where K M refers to the module distribution coefficient, Cb1-rating refers to the module rated capacity of the target outdoor unit module, Cb2-rating refers to the module rated capacity of the candidate outdoor unit module, Qa-outdoor refers to the whole machine demand capacity, and K1 and K2 are respectively predetermined parameter values.

3. The method according to claim 2, wherein The controlling the start / stop switching of the target outdoor unit module and the candidate outdoor unit module according to the module energy efficiency range includes: When the module energy efficiency range is the first module energy efficiency range, controlling the target outdoor unit module to operate and the candidate outdoor unit module to stop operating; When the module energy efficiency range is the second module energy efficiency range, controlling the target outdoor unit module and the candidate outdoor unit module to maintain their original states; When the module energy efficiency range is the third module energy efficiency range, controlling the target outdoor unit module to operate and the candidate outdoor unit module to operate.

4. The method according to claim 1, characterized in that The target outdoor unit module includes a first compressor and a second compressor; the method further includes: Collecting the operating parameters of the first compressor in the target outdoor unit module; Performing calculation and analysis based on the operating parameters of the compressor to obtain a compressor performance score; Determining a start / stop switching coefficient according to the compressor performance score; Determining a compressor energy efficiency range based on the rated capacity of the first compressor, the start / stop switching coefficient, and the module distribution capacity of the target outdoor unit module; Controlling the start / stop switching of the first compressor and the second compressor in the target outdoor unit module according to the compressor energy efficiency range.

5. The method according to claim 4, wherein The determining the compressor energy efficiency range based on the rated capacity of the first compressor, the start / stop switching coefficient, and the module distribution capacity of the target outdoor unit module includes: If C1×K Y <C M , then it is determined that the energy efficiency range of the press is the first energy efficiency range of the press; If C1 × K Y - K3 < C M ≤ C1 × Kmax, then determine that the energy efficiency range of the press is the second energy efficiency range of the press; If 0 < C M ≤ C1 × K Y - K3, then determine that the energy efficiency range of the press is the third energy efficiency range of the press; Among them, C1 refers to the rated capacity of the compressor of the first compressor, and K Y refers to the start-stop switching coefficient, and C M refers to the module allocation capacity of the target outdoor unit module, Kmax refers to the start-stop upper limit coefficient of the target outdoor unit module, and K3 is a predetermined parameter value.

6. The method according to claim 5, characterized in that, The controlling the start / stop switching of the first compressor and the second compressor in the target outdoor unit module according to the compressor energy efficiency range includes: When the compressor energy efficiency range is the first compressor energy efficiency range, controlling the first compressor to operate and the second compressor to stop operating; When the compressor energy efficiency range is the second compressor energy efficiency range, controlling the first compressor and the second compressor to maintain their original states; When the compressor energy efficiency range is the third compressor energy efficiency range, controlling the first compressor to operate and the second compressor to operate.

7. The method according to claim 4, characterized in that After determining the start / stop switching coefficient according to the compressor performance score, the method further includes: Receive the actual operating power of the first compressor; Calculate the theoretical operating power of the first compressor according to the compressor operating parameters of the first compressor; Correct the compressor performance score according to the deviation value between the actual operating power and the theoretical operating power; Update the start-stop switching coefficient according to the corrected compressor performance score.

8. A multi-connected air conditioner control device, characterized in that, Comprising: A memory storing a computer program; A processor that reads the computer program stored in the memory to execute the method according to any one of claims 1 to 7.

9. A storage medium, characterized in that, A computer program is stored thereon, and when the computer program is executed by a processor of a multi-connected air conditioner control device, the multi-connected air conditioner control device is caused to execute the method according to any one of claims 1 to 7.

10. A multi-connected air conditioner, characterized in that, Comprising the multi-connected air conditioner control device according to claim 8 and other multi-connected air conditioner modules.

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