Control method for multi-split air conditioning device, apparatus, multi-split air conditioning device, and storage medium

Abstract

Disclosed in the present application are a control method for a multi-split air conditioning device, an apparatus, a multi-split air conditioning device, and a storage medium. The control method for a multi-split air conditioning device comprises: acquiring the historical average demand frequency of each indoor unit; on the basis of the historical average demand frequencies, determining in the current cycle a target operating frequency of a compressor and target opening degrees of electronic expansion valves; and, on the basis of the target operating frequency and the target opening degrees of the electronic expansion valves, controlling the operation of the multi-split air conditioning device.

Description

Control methods, devices, multi-split air conditioning units and storage media

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202411008260.3, filed on July 25, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of multi-split air conditioning technology, and in particular to control methods, devices, multi-split air conditioning equipment, and storage media for multi-split air conditioning equipment. Background Technology

[0004] In multi-split air conditioning systems, sudden changes in the control requirements of each indoor unit can easily lead to problems such as overheating, underheating, and noise, causing user discomfort. Existing technical solutions mainly apply smoothing strategies to the compressor through methods such as step transitions and averages of differences. However, these smoothing strategies cannot be applied according to the needs of each indoor unit, making it difficult to effectively solve problems such as overheating, underheating, and noise in a particular indoor unit.

[0005] The above content is only used to help understand the technical solution of this application and does not represent an admission that the above content is prior art. Summary of the Invention

[0006] The main objective of this application is to provide a control method, device, multi-unit air conditioning system, and storage medium, aiming to solve the technical problem that existing technologies cannot perform corresponding smoothing processing according to the needs of each indoor unit during smoothing processing.

[0007] To achieve the above objectives, this application proposes a control method for a multi-split air conditioning system, the multi-split air conditioning system including an outdoor unit and at least two indoor units, the outdoor unit including at least one compressor, and each indoor unit correspondingly equipped with an electronic expansion valve, the method comprising:

[0008] Obtain the historical average demand frequency for each internal unit;

[0009] Based on the historical average demand frequency, determine the target operating frequency of the compressor and the target opening degree of the electronic expansion valve for the current cycle;

[0010] The operation of the multi-unit air conditioning system is controlled according to the target operating frequency and the target opening degree of the electronic expansion valve.

[0011] In one embodiment, the step of determining the target frequency of the compressor and the target opening degree of each electronic expansion valve in the current cycle based on the historical average demand frequency includes:

[0012] Obtain the initial target frequency of the compressor and the initial target opening of each electronic expansion valve within the current cycle;

[0013] The initial demand frequency of each indoor unit is determined based on the initial target frequency of the compressor and the initial target opening of each electronic expansion valve within the current cycle.

[0014] Based on the historical average demand frequency of each indoor unit, the initial demand frequency of each indoor unit is smoothed to obtain the corrected demand frequency of each indoor unit, and the sum of the corrected demand frequencies of each indoor unit is used as the corrected target frequency of the compressor in the current cycle.

[0015] Based on the correction frequency required by each indoor unit, the initial target opening of the electronic expansion valve is corrected to obtain the corrected target opening of each electronic expansion valve.

[0016] In one embodiment, the step of smoothing the determined initial demand frequency of each indoor unit based on the historical average demand frequency of each indoor unit to obtain the corrected demand frequency of each indoor unit includes:

[0017] A first frequency range is determined based on the difference between the historical average demand frequency and the first frequency, and the corrected demand frequency for each indoor unit is determined based on the first frequency range; or,

[0018] The second frequency range is determined based on the historical average demand frequency and the first frequency multiplier, and the corrected demand frequency for each indoor unit is determined based on the second frequency range.

[0019] In one embodiment, the step of smoothing the determined initial demand frequency of each indoor unit based on the historical average demand frequency of each indoor unit to obtain the corrected demand frequency of each indoor unit includes:

[0020] Determine a reasonable smoothing range based on the historical average demand frequency;

[0021] The initial demand frequency of each internal unit is compared with a reasonable smoothing range;

[0022] When the initial demand frequency of each indoor unit is within a reasonable smoothing range, the demand frequency of each indoor unit is the corrected demand frequency;

[0023] When the initial demand frequency of each indoor unit is not within a reasonable smoothing range, the corrected demand frequency is the target boundary value of the reasonable smoothing range.

[0024] In one embodiment, the step of correcting the target opening of the electronic expansion valve according to the correction requirement frequency of each indoor unit, and obtaining the corrected target opening of each electronic expansion valve, includes:

[0025] Determine the proportion of the demand frequency for each indoor unit based on the correction demand frequency of each indoor unit.

[0026] Based on the required frequency ratio of each indoor unit and the total target opening of the electronic expansion valve, the corrected target opening of each electronic expansion valve is determined.

[0027] In one embodiment, the step of obtaining the historical average demand frequency of each indoor unit includes:

[0028] Obtain the compressor frequency information and electronic expansion valve opening information of the multi-split air conditioning unit in each cycle within a preset number of cycles;

[0029] Based on the compressor frequency information and the electronic expansion valve opening information for each cycle, determine the proportion of electronic expansion valve opening for each indoor unit and the historical demand frequency of each indoor unit for each cycle.

[0030] Based on the percentage of electronic expansion valve opening of each indoor unit within a preset number of cycles and the historical demand frequency, the historical average demand frequency of each indoor unit is determined.

[0031] In one embodiment, the step of determining the percentage of electronic expansion valve opening of each indoor unit and the historical demand frequency of each indoor unit in each cycle based on the compressor frequency information and the electronic expansion valve opening information of each cycle includes:

[0032] The opening degree of the electronic expansion valve of each indoor unit and the sum of the opening degrees of the electronic expansion valves are determined based on the electronic expansion valve opening information.

[0033] The percentage of the electronic expansion valve opening is determined based on the opening degree of the indoor unit's electronic expansion valve and the sum of the opening degrees of the electronic expansion valves.

[0034] Based on the compressor frequency information and the opening ratio of each electronic expansion valve within the same cycle, the historical demand frequency of each indoor unit is determined.

[0035] Furthermore, to achieve the above objectives, this application also proposes a control device for a multi-split air conditioning system, the control device comprising:

[0036] The data processing module obtains the historical average demand frequency of each internal unit;

[0037] The parameter calculation module is used to determine the target operating frequency of the compressor and the target opening degree of the electronic expansion valve in the current cycle based on the historical average demand frequency.

[0038] The operation control module is used to control the operation of the multi-unit equipment according to the target operating frequency and the target opening degree of the electronic expansion valve.

[0039] In addition, to achieve the above objectives, this application also proposes a control device for a multi-unit air conditioning system, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the control method for the multi-unit air conditioning system as described above.

[0040] In addition, to achieve the above objectives, this application also proposes a storage medium, which is a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of the control method for multi-unit equipment as described above.

[0041] In addition, to achieve the above objectives, this application also provides a computer program product, which includes a computer program that, when executed by a processor, implements the steps of the control method for multi-unit equipment as described above.

[0042] One or more technical solutions proposed in this application have at least the following technical effects:

[0043] This application obtains the historical average demand frequency of each indoor unit; based on the historical average demand frequency, it determines the target operating frequency of the compressor and the target opening degree of the electronic expansion valve in the current cycle; and controls the operation of the multi-split air conditioning unit based on the target operating frequency and the target opening degree of the electronic expansion valve. In this way, it achieves the calculation of the set target frequency of the compressor and the target opening degree of each electronic expansion valve in the current cycle based on the historical data and average demand frequency of each indoor unit, thereby controlling the operation of the entire multi-split air conditioning unit based on the target operating frequency and target opening degree. This achieves smoothing of the demand frequency of multiple indoor units, resulting in more stable control and effectively avoiding problems such as overheating, underheating, and noise. Attached Figure Description

[0044] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0045] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 is a flowchart illustrating the control method for multi-unit air conditioning provided in Embodiment 1 of this application.

[0047] Figure 2 is a schematic diagram of the structure of a multi-unit air conditioning system in one embodiment of the control method for multi-unit air conditioning system of this application;

[0048] Figure 3 is a schematic diagram of a smoothing strategy in one embodiment of the control method for multi-unit equipment of this application;

[0049] Figure 4 is a flowchart illustrating the control method for multi-unit equipment provided in Embodiment 2 of this application.

[0050] Figure 5 is a schematic diagram of the module structure of the control device of the multi-unit equipment according to an embodiment of this application;

[0051] Figure 6 is a schematic diagram of the hardware operating environment involved in the control method of the multi-unit equipment in the embodiments of this application.

[0052] Explanation of icon numbers:

[0053] Label Name A Outdoor Unit B1, B2 Indoor Unit 1 Compressor 2 Electronic Expansion Valve

[0054] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Embodiments of the present invention

[0055] It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0056] To better understand the technical solution of this application, a detailed description will be provided below in conjunction with the accompanying drawings and specific implementation methods.

[0057] The main solution of this application embodiment is: to obtain the historical average demand frequency of each indoor unit; to determine the target operating frequency of the compressor and the target opening degree of the electronic expansion valve in the current cycle based on the historical average demand frequency; and to control the operation of the multi-split air conditioning unit based on the target operating frequency and the target opening degree of the electronic expansion valve.

[0058] In this embodiment, for ease of description, the following description will focus on identifying multi-unit air conditioning units.

[0059] In multi-split air conditioning systems, current technologies are prone to issues like overheating, underheating, and noise problems if the control requirements of each indoor unit change abruptly, causing user discomfort. Existing solutions primarily employ smoothing strategies on the compressor using methods such as step transitions and averages of differences. However, these strategies cannot be applied based on the specific needs of each indoor unit, making it difficult to effectively address issues like overheating, underheating, and noise in any particular indoor unit.

[0060] This application provides a solution that calculates the target frequency of the compressor and the target opening degree of each electronic expansion valve in the current cycle based on the historical data and average demand frequency of each indoor unit. This allows for the control of the entire multi-split air conditioning unit based on the target operating frequency and target opening degree, thereby smoothing the demand frequency of multiple indoor units, resulting in more stable control and effectively avoiding problems such as overheating, underheating, and noise.

[0061] It should be noted that the executing entity in this embodiment can be a computing service device with data processing, network communication, and program execution functions, such as a tablet computer, personal computer, or mobile phone, or an electronic device, air conditioner, or multi-split air conditioning unit capable of performing the above functions. The following description uses a multi-split air conditioning unit as an example to illustrate this embodiment and the subsequent embodiments.

[0062] Based on this, the present application provides a control method for a multi-unit air conditioning system. Referring to Figure 1, Figure 1 is a flowchart illustrating the first embodiment of the control method for a multi-unit air conditioning system of the present application.

[0063] In this embodiment, the control method for the multi-unit air conditioning system includes steps S10 to S30:

[0064] Step S10: Obtain the historical average demand frequency for each internal unit.

[0065] It should be noted that, as shown in Figure 2, the multi-split air conditioning unit in this embodiment includes one outdoor unit A and at least two indoor units B1 and B2. That is, the most basic multi-split air conditioning unit includes one outdoor unit and two indoor units, with the number of indoor units being greater than or equal to 2. At the same time, the outdoor unit includes at least one compressor 1, and each indoor unit is equipped with one and only one electronic expansion valve 2. The connection between each indoor unit and the outdoor unit is controlled by the opening degree of the electronic expansion valve.

[0066] It should be understood that, as shown in Figure 3, in the scheme of this embodiment, the total opening degree of the electronic expansion valve remains unchanged, and the control of the smoothing strategy is achieved only by adjusting between multiple indoor units.

[0067] It should be understood that the historical average demand frequency refers to the average demand frequency of each internal unit in the historical records.

[0068] In one embodiment, to accurately obtain the historical average demand frequency, step S10 includes: obtaining the compressor frequency information and electronic expansion valve opening information of the multi-split air conditioning unit in each cycle within a preset number of cycles; determining the proportion of electronic expansion valve opening of each indoor unit and the historical demand frequency of each indoor unit in each cycle based on the compressor frequency information and the electronic expansion valve opening information in each cycle; and determining the historical average demand frequency of each indoor unit based on the proportion of electronic expansion valve opening of each indoor unit and the historical demand frequency within the preset number of cycles.

[0069] In practice, the compressor frequency information and electronic expansion valve opening information of the multi-split air conditioning unit are first retrieved from the background storage, counting backwards a preset number of cycles. The preset number is a positive integer greater than or equal to 1. Each time interval T (e.g., 1 minute) constitutes one cycle.

[0070] It should be noted that after obtaining the compressor frequency information and the electronic expansion valve opening information, the demand frequency corresponding to each indoor unit in each cycle is determined as the historical demand frequency, and the proportion of the opening degree of the electronic expansion valve corresponding to each indoor unit to the total opening degree of all electronic expansion valves.

[0071] It should be understood that after determining the percentage of the opening of the indoor unit's electronic expansion valve and the historical demand frequency, the average value of the demand frequency statistically analyzed in each cycle is determined, which is the historical average demand frequency.

[0072] In one embodiment, to accurately determine the historical demand frequency, the steps of determining the electronic expansion valve opening ratio of each indoor unit and the historical demand frequency of each indoor unit within each cycle based on the compressor frequency information and the electronic expansion valve opening information of each cycle include: determining the indoor unit electronic expansion valve opening and the sum of electronic expansion valve openings based on the electronic expansion valve opening information; determining the electronic expansion valve opening ratio based on the indoor unit electronic expansion valve opening and the sum of electronic expansion valve openings; and determining the historical demand frequency of each indoor unit based on the compressor frequency information and the electronic expansion valve opening ratio within the same cycle.

[0073] In the specific implementation, firstly, the compressor frequency and the opening degree data of each electronic expansion valve over the past N cycles are obtained; for the data of each cycle, the proportion of electronic expansion valve opening degree of indoor unit i is calculated as p(i) = opening degree of indoor unit i expansion valve / sum of opening degrees of all expansion valves, and the demand frequency of indoor unit i is calculated as H(i) = p(i) * compressor frequency; finally, the average value of H(i) over N cycles is calculated as the historical average demand frequency of indoor unit i as HA(i) = ∑H(i) / N.

[0074] Step S20: Based on the historical average demand frequency, determine the target operating frequency of the compressor and the target opening degree of the electronic expansion valve in the current cycle.

[0075] It should be noted that after obtaining the historical average demand frequency, the target operating frequency of the compressor in the current cycle is calculated based on the historical average frequency. Then, the demand frequency and correction frequency are calculated based on the target operating frequency. Finally, the opening of the electronic expansion valve is corrected based on the corrected demand frequency to obtain the corrected target opening.

[0076] Step S30: Control the operation of the multi-unit equipment according to the target operating frequency and the target opening degree of the electronic expansion valve.

[0077] It should be understood that after determining the target operating frequency and the target opening degree of the electronic expansion valve, controlling the operation of the multi-split unit according to the target operating frequency Hc and the corrected opening degree of each electronic expansion valve can not only keep the compressor frequency and the sum of the angles of each expansion valve constant, but also achieve smoothing of the demand frequency of multiple indoor units.

[0078] This embodiment provides a control method for a multi-split air conditioning system. The method involves acquiring the historical average demand frequency of each indoor unit; determining the target operating frequency of the compressor and the target opening degree of the electronic expansion valve within the current cycle based on the historical average demand frequency; and controlling the operation of the multi-split air conditioning system based on the target operating frequency and the target opening degree of the electronic expansion valve. This approach calculates the set target frequency of the compressor and the target opening degree of each electronic expansion valve within the current cycle based on the historical data and average demand frequency of each indoor unit. This allows for control of the entire multi-split air conditioning system based on the target operating frequency and target opening degree, achieving smoother control of the demand frequencies of multiple indoor units, resulting in more stable control and effectively avoiding problems such as overheating, underheating, and noise.

[0079] Based on the first embodiment of this application, in the second embodiment of this application, the content that is the same as or similar to that in the first embodiment described above can be referred to the above description and will not be repeated hereafter. Based on this, please refer to Figure 4; step S20 includes steps S201 to S204:

[0080] Step S201: Obtain the initial target frequency of the compressor and the initial target opening degree of each electronic expansion valve in the current cycle.

[0081] It should be noted that, firstly, the initial operating frequency of the compressor at the start of the current cycle is obtained as the initial target frequency, and the opening degree of each electronic expansion valve at the start of the current cycle is obtained as the initial target opening degree.

[0082] Step S202: Determine the initial demand frequency of each indoor unit based on the initial target frequency of the compressor and the initial target opening degree of each electronic expansion valve in the current cycle.

[0083] It should be understood that after obtaining the initial target frequency and the initial target opening of the electronic expansion valve, the weight of each indoor unit is first determined according to the ratio of each initial target opening. Then, the initial target frequency is divided according to the weight to determine the initial demand frequency of each indoor unit. That is, the ratio of the initial demand frequency of each indoor unit is the same as the ratio of the initial target opening.

[0084] Step S203: Based on the historical average demand frequency of each indoor unit, smooth the determined initial demand frequency of each indoor unit to obtain the corrected demand frequency of each indoor unit, and use the sum of the corrected demand frequencies of each indoor unit as the corrected target frequency of the compressor in the current cycle.

[0085] In practice, after determining the initial demand frequency, a smoothing process is performed based on the historical average demand frequency to obtain the corrected demand frequency of each indoor unit. Then, the corrected demand frequencies of each indoor unit are added together to form the corrected target frequency of the compressor.

[0086] In one embodiment, in order to accurately calculate the corrected demand frequency, step S203 includes: determining a first frequency range based on the historical average demand frequency and a first frequency difference, and determining the corrected demand frequency of each indoor unit based on the first frequency range; or, determining a second frequency range based on the historical average demand frequency and a first frequency multiplier, and determining the corrected demand frequency of each indoor unit based on the second frequency range.

[0087] It should be noted that there are two smoothing strategies for determining the frequency of correction demand: fixed step and proportional step.

[0088] It should be understood that for each internal unit, the fixed step adjustment frequency for this cycle is within the first frequency range of [historical average demand frequency - G, historical average demand frequency + G], where G is the first frequency difference.

[0089] In practice, the proportional step ratio is applied to each internal unit. The target frequency for this cycle is in the second frequency range of [historical average demand frequency * 0.8, historical average demand frequency * 1.2]. The first frequency multiplier corresponds to the multiplier of 0.8 on the left boundary and 1.2 on the right boundary.

[0090] In one embodiment, to correct a more reasonable average demand frequency, step S203 includes: determining a reasonable smoothing range based on the historical average demand frequency; comparing the initial demand frequency of each indoor unit with the reasonable smoothing range; when the initial demand frequency of each indoor unit is within the reasonable smoothing range, the demand frequency of each indoor unit is the corrected demand frequency; when the initial demand frequency of each indoor unit is not within the reasonable smoothing range, the corrected demand frequency is the target boundary value of the reasonable smoothing range.

[0091] It should be noted that, firstly, a reasonable smoothing range is determined. The reasonable smoothing range is the normal range of the frequency range of each indoor unit, which is determined in advance based on the historical average demand frequency.

[0092] It should be understood that after determining a reasonable smoothing range, the initial demand frequency of each indoor unit is compared with the reasonable smoothing range to determine the demand frequency of each indoor unit. If the initial demand frequency of the current cycle is within the reasonable smoothing range, then that frequency value is maintained; if the initial demand frequency of the current cycle is not within the reasonable smoothing range, then the target range boundary value is taken, which is one of the boundary values ​​that the initial demand frequency of each indoor unit is closer to.

[0093] Step S204: Based on the correction requirement frequency of each indoor unit, the initial target opening of the electronic expansion valve is corrected to obtain the corrected target opening of each electronic expansion valve.

[0094] In practice, after obtaining the correction demand frequency of each internal unit, the initial target opening is adjusted based on the correction demand frequency, thereby determining the correction target opening.

[0095] It should be noted that, for the correction requirement frequency value HC(i) of each indoor unit, the percentage of the opening degree of each expansion valve after correction is calculated.

[0096] In one embodiment, in order to accurately calculate the correction target opening, step S204 includes: determining the proportion of the demand frequency of each indoor unit based on the correction demand frequency of each indoor unit; and determining the correction target opening of each electronic expansion valve based on the proportion of the demand frequency of each indoor unit and the total target opening of the electronic expansion valve.

[0097] It should be understood that, firstly, the total frequency demand after correction is calculated, then the proportion of the demand frequency of each indoor unit to the total compressor frequency is determined to obtain the demand frequency proportion. Then, using the total target opening degree of the electronic expansion valve, which is the sum of the original electronic expansion valve angles, as the base, the corrected opening degree of each expansion valve is calculated, specifically by multiplying the demand frequency proportion by the sum of the original electronic expansion valve angles.

[0098] This embodiment obtains the initial target frequency of the compressor and the initial target opening of each electronic expansion valve within the current cycle; based on the initial target frequency of the compressor and the initial target opening of each electronic expansion valve within the current cycle, it determines the initial demand frequency of each indoor unit; based on the historical average demand frequency of each indoor unit, it smooths the determined initial demand frequency of each indoor unit to obtain the corrected demand frequency of each indoor unit, and the sum of the corrected demand frequencies of each indoor unit is used as the corrected target frequency of the compressor within the current cycle; based on the corrected demand frequency of each indoor unit, it corrects the initial target opening of the electronic expansion valve to obtain the corrected target opening of each electronic expansion valve. In this way, it achieves the calculation of corrected target frequency and corrected target opening based on various data of the compressor and electronic expansion valve within the current cycle, thus maintaining the compressor frequency and the sum of the angles of each expansion valve unchanged while smoothing the demand frequencies of multiple indoor units.

[0099] It should be noted that the above examples are only for understanding this application and do not constitute a limitation on the control method of the multi-unit equipment of this application. Any simple modifications based on this technical concept are within the protection scope of this application.

[0100] This application also provides a control device for a multi-split air conditioning system. Referring to Figure 5, the control device for the multi-split air conditioning system includes:

[0101] Data processing module 10 obtains the historical average demand frequency of each internal unit.

[0102] The parameter calculation module 20 is used to determine the target operating frequency of the compressor and the target opening degree of the electronic expansion valve in the current cycle based on the historical average demand frequency.

[0103] The operation control module 30 is used to control the operation of the multi-unit equipment according to the target operating frequency and the target opening degree of the electronic expansion valve.

[0104] In one embodiment, the parameter calculation module 20 is further configured to: obtain the initial target frequency of the compressor and the initial target opening of each electronic expansion valve in the current cycle; determine the initial demand frequency of each indoor unit based on the initial target frequency of the compressor and the initial target opening of each electronic expansion valve in the current cycle; smooth the determined initial demand frequency of each indoor unit based on the historical average demand frequency of each indoor unit to obtain the corrected demand frequency of each indoor unit, and use the sum of the corrected demand frequencies of each indoor unit as the corrected target frequency of the compressor in the current cycle; and correct the initial target opening of the electronic expansion valve based on the corrected demand frequency of each indoor unit to obtain the corrected target opening of each electronic expansion valve.

[0105] In one embodiment, the parameter calculation module 20 is further configured to determine a first frequency range based on the historical average demand frequency and the first frequency difference, and determine the corrected demand frequency of each indoor unit based on the first frequency range; or, determine a second frequency range based on the historical average demand frequency and the first frequency multiplier, and determine the corrected demand frequency of each indoor unit based on the second frequency range.

[0106] In one embodiment, the parameter calculation module 20 is further configured to determine a reasonable smoothing range based on the historical average demand frequency; compare the initial demand frequency of each indoor unit with the reasonable smoothing range; when the initial demand frequency of each indoor unit is within the reasonable smoothing range, the demand frequency of each indoor unit is the corrected demand frequency; when the initial demand frequency of each indoor unit is not within the reasonable smoothing range, the corrected demand frequency is the target boundary value of the reasonable smoothing range.

[0107] In one embodiment, the parameter calculation module 20 is further configured to determine the proportion of the required frequency of each indoor unit based on the correction required frequency of each indoor unit; and to determine the correction target opening of each electronic expansion valve based on the proportion of the required frequency of each indoor unit and the total target opening of the electronic expansion valve.

[0108] In one embodiment, the data processing module 10 is further configured to acquire compressor frequency information and electronic expansion valve opening information of the multi-split air conditioning unit within a preset number of cycles; determine the proportion of electronic expansion valve opening of each indoor unit and the historical demand frequency of each indoor unit in each cycle based on the compressor frequency information and electronic expansion valve opening information in each cycle; and determine the historical average demand frequency of each indoor unit based on the proportion of electronic expansion valve opening of each indoor unit and the historical demand frequency within the preset number of cycles.

[0109] In one embodiment, the data processing module 10 is further configured to determine the opening degree of the indoor unit's electronic expansion valve and the sum of the electronic expansion valve opening degrees of each indoor unit based on the electronic expansion valve opening degree information; determine the electronic expansion valve opening degree ratio based on the indoor unit's electronic expansion valve opening degree and the sum of the electronic expansion valve opening degrees; and determine the historical demand frequency of each indoor unit based on the compressor frequency information and the opening degree ratio of each electronic expansion valve within the same cycle.

[0110] This embodiment obtains the historical average demand frequency of each indoor unit; based on the historical average demand frequency, it determines the target operating frequency of the compressor and the target opening degree of the electronic expansion valve in the current cycle; and controls the operation of the multi-split air conditioning unit based on the target operating frequency and the target opening degree of the electronic expansion valve. In this way, it achieves the calculation of the set target frequency of the compressor and the target opening degree of each electronic expansion valve in the current cycle based on the historical data and average demand frequency of each indoor unit, thereby controlling the operation of the entire multi-split air conditioning unit based on the target operating frequency and target opening degree. This achieves smoothing of the demand frequency of multiple indoor units, resulting in more stable control and effectively avoiding problems such as overheating, underheating, and noise.

[0111] The control device for multi-split air conditioning units provided in this application, employing the control method for multi-split air conditioning units described in the above embodiments, can solve the technical problem that smoothing processing cannot be performed according to the needs of each indoor unit. Compared with the prior art, the beneficial effects of the control device for multi-split air conditioning units provided in this application are the same as those of the control method for multi-split air conditioning units provided in the above embodiments, and other technical features in the control device for multi-split air conditioning units are the same as those disclosed in the methods of the above embodiments, and will not be repeated here.

[0112] This application provides a control device for a multi-unit air conditioning system. The control device includes: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to perform the control method for the multi-unit air conditioning system described in Embodiment 1 above.

[0113] Referring to Figure 6 below, a schematic diagram of a control device suitable for implementing the embodiments of this application is shown. The control device for the multi-connected device in the embodiments of this application may include, but is not limited to, mobile terminals such as mobile phones, laptops, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Description), PMPs (Portable Media Players), in-vehicle terminals (e.g., in-vehicle navigation terminals), and fixed terminals such as digital TVs and desktop computers. The control device for the multi-connected device shown in Figure 6 is merely an example and should not impose any limitations on the functionality and scope of use of the embodiments of this application.

[0114] As shown in Figure 6, the control device of a multi-unit system may include a processing unit 1001 (e.g., a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 1002 or a program loaded from a storage device 1003 into a random access memory (RAM) 1004. The RAM 1004 also stores various programs and data required for the operation of the control device of the multi-unit system. The processing unit 1001, ROM 1002, and RAM 1004 are interconnected via a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Typically, the following systems can be connected to the I / O interface 1006: input devices 1007 including, for example, a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices 1008 including, for example, a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices 1003 including, for example, magnetic tape, hard disk, etc.; and communication devices 1009. Communication device 1009 allows the control equipment of a multi-unit system to communicate wirelessly or wiredly with other equipment to exchange data. Although the figures show control equipment for multi-unit systems with various systems, it should be understood that implementation or possession of all the systems shown is not required. More or fewer systems may be implemented alternatively.

[0115] Specifically, according to the embodiments disclosed in this application, the processes described above with reference to the flowcharts can be implemented as computer software programs. For example, embodiments disclosed in this application include a computer program product comprising a computer program carried on a computer-readable medium, the computer program containing program code for performing the methods shown in the flowcharts. In such embodiments, the computer program can be downloaded and installed from a network via a communication device, or installed from storage device 1003, or installed from ROM 1002. When the computer program is executed by processing device 1001, it performs the functions defined in the methods of the embodiments disclosed in this application.

[0116] The control device for multi-split air conditioning units provided in this application, employing the control method for multi-split air conditioning units described in the above embodiments, can solve the technical problem that smoothing processing cannot be performed according to the needs of each indoor unit. Compared with the prior art, the beneficial effects of the control device for multi-split air conditioning units provided in this application are the same as those of the control method for multi-split air conditioning units provided in the above embodiments, and other technical features in the control device for multi-split air conditioning units are the same as those disclosed in the previous embodiment method, and will not be repeated here.

[0117] It should be understood that the various parts disclosed in this application can be implemented using hardware, software, firmware, or a combination thereof. In the description of the above embodiments, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0118] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0119] This application provides a computer-readable storage medium having computer-readable program instructions (i.e., a computer program) stored thereon, the computer-readable program instructions being used to execute the control method of the multi-unit device described in the above embodiments.

[0120] The computer-readable storage medium provided in this application may be, for example, a USB flash drive, but is not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or any combination thereof. More specific examples of computer-readable storage media may include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, system, or device. The program code contained on the computer-readable storage medium may be transmitted using any suitable medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination thereof.

[0121] The aforementioned computer-readable storage medium may be included in the control equipment of the multi-unit system; or it may exist independently and not be assembled into the control equipment of the multi-unit system.

[0122] The aforementioned computer-readable storage medium carries one or more programs that, when executed by the control device of the multi-split air conditioning unit, cause the control device of the multi-split air conditioning unit to: acquire the historical average demand frequency of each indoor unit; determine the target operating frequency of the compressor and the target opening degree of the electronic expansion valve in the current cycle based on the historical average demand frequency; and control the operation of the multi-split air conditioning unit based on the target operating frequency and the target opening degree of the electronic expansion valve.

[0123] Computer program code for performing the operations of this application can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a Local Area Network (LAN) or a Wide Area Network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0124] The flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of this application. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions indicated in the blocks may occur in a different order than those indicated in the drawings. For example, two consecutively indicated blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or operation, or using a combination of dedicated hardware and computer instructions.

[0125] The modules described in the embodiments of this application can be implemented in software or hardware. The names of the modules do not necessarily limit the functionality of the unit itself.

[0126] The readable storage medium provided in this application is a computer-readable storage medium that stores computer-readable program instructions (i.e., a computer program) for executing the control method of the multi-unit air conditioning system described above. This solves the technical problem that smoothing processing cannot be performed according to the needs of each internal unit during smoothing operations. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as those of the control method of the multi-unit air conditioning system provided in the above embodiments, and will not be elaborated upon here.

[0127] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the steps of the control method for multi-unit devices as described above.

[0128] The computer program product provided in this application can solve the technical problem that smoothing processing cannot be performed according to the needs of each internal unit. Compared with the prior art, the beneficial effects of the computer program product provided in this application are the same as the beneficial effects of the control method for multi-unit air conditioning equipment provided in the above embodiments, and will not be repeated here.

[0129] The above description is only a part of the embodiments of this application and does not limit the patent scope of this application. All equivalent structural transformations made under the technical concept of this application and using the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included in the patent protection scope of this application.

Claims

1. A control method of a multi VRF device, the multi VRF device including an outdoor unit and at least two indoor units, the outdoor unit including at least one compressor, each indoor unit being provided with an electronic expansion valve, wherein, The method comprises: acquiring historical average demand frequencies of the indoor units; determining target operating frequencies of the compressor and target opening degrees of the electronic expansion valves in a current period according to the historical average demand frequencies; controlling the operation of the multi-connected air conditioning device according to the target operating frequencies and the target opening degrees of the electronic expansion valves.

2. The method of claim 1, wherein, The step of determining the target frequencies of the compressor and the target opening degrees of the electronic expansion valves in the current period according to the historical average demand frequencies comprises: acquiring initial target frequencies of the compressor and initial target opening degrees of the electronic expansion valves in the current period; determining initial demand frequencies of the indoor units according to the initial target frequencies of the compressor and the initial target opening degrees of the electronic expansion valves in the current period; smoothing the determined initial demand frequencies of the indoor units according to the historical average demand frequencies of the indoor units to obtain corrected demand frequencies of the indoor units, and taking the sum of the corrected demand frequencies of the indoor units as a corrected target frequency of the compressor in the current period; correcting the initial target opening degrees of the electronic expansion valves according to the corrected demand frequencies of the indoor units to obtain corrected target opening degrees of the electronic expansion valves.

3. The method of claim 2, wherein, The step of smoothing the determined initial demand frequencies of the indoor units according to the historical average demand frequencies of the indoor units to obtain corrected demand frequencies of the indoor units comprises: determining a first frequency interval according to the historical average demand frequencies and a first frequency difference, and determining the corrected demand frequencies of the indoor units according to the first frequency interval; or determining a second frequency interval according to the historical average demand frequencies and a first frequency ratio, and determining the corrected demand frequencies of the indoor units according to the second frequency interval.

4. The method of claim 2, wherein, The step of smoothing the determined initial demand frequencies of the indoor units according to the historical average demand frequencies of the indoor units to obtain corrected demand frequencies of the indoor units comprises: determining a reasonable smoothing range according to the historical average demand frequencies; comparing the initial demand frequencies of the indoor units with the reasonable smoothing range; when the initial demand frequencies of the indoor units are in the reasonable smoothing range, the demand frequencies of the indoor units are the corrected demand frequencies; when the initial demand frequencies of the indoor units are not in the reasonable smoothing range, the corrected demand frequencies are target boundary values of the reasonable smoothing range.

5. The method of claim 2, wherein, The step of correcting the target opening degrees of the electronic expansion valves according to the corrected demand frequencies of the indoor units to obtain corrected target opening degrees of the electronic expansion valves comprises: determining demand frequency proportions of the indoor units according to the corrected demand frequencies of the indoor units; determining the corrected target opening degrees of the electronic expansion valves according to the demand frequency proportions of the indoor units and a total target opening degree of the electronic expansion valves.

6. The method of claim 1, wherein, The step of acquiring the historical average demand frequencies of the indoor units comprises: acquiring compressor frequency information and electronic expansion valve opening degree information of each period within a preset number of periods of the multi-connected air conditioning device; determining electronic expansion valve opening degree proportions of the indoor units and historical demand frequencies of the indoor units of each period according to the compressor frequency information and the electronic expansion valve opening degree information of each period. According to the proportion of the opening degree of the electronic expansion valve of each indoor unit in the preset number of periods and the historical demand frequency, the historical average demand frequency of each indoor unit is determined.

7. The method of claim 6, wherein, The step of determining the proportion of the opening degree of the electronic expansion valve of each indoor unit in each period and the historical demand frequency of each indoor unit according to the compressor frequency information and the electronic expansion valve opening degree information of each period comprises: According to the electronic expansion valve opening degree information, the indoor unit electronic expansion valve opening degree of each indoor unit and the total electronic expansion valve opening degree are determined. According to the indoor unit electronic expansion valve opening degree and the total electronic expansion valve opening degree, the proportion of the electronic expansion valve opening degree is determined. According to the compressor frequency information and the proportion of the electronic expansion valve opening degree of each indoor unit in the same period, the historical demand frequency of each indoor unit is determined.

8. A control device of a multi-split system, wherein, The device comprises: a data processing module configured to obtain the historical average demand frequency of each indoor unit; a parameter calculation module configured to determine the target running frequency of the compressor and the target opening degree of the electronic expansion valve in the current period according to the historical average demand frequency; a running control module configured to control the operation of the multi-split air conditioning device according to the target running frequency and the target opening degree of the electronic expansion valve.

9. A multi-split system device, wherein, The multi-split air conditioning device comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the control method of the multi-split air conditioning device according to any one of claims 1 to 7.

10. A storage medium, wherein, The storage medium is a computer readable storage medium, and the storage medium stores a computer program, and the computer program is executed by the processor to implement the steps of the control method of the multi-split air conditioning device according to any one of claims 1 to 7.

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