Multi-split air conditioning control methods, devices, electronic equipment and storage media

Abstract

This application provides a multi-split chiller control method, apparatus, electronic device, and storage medium. Applied to a chiller unit, the chiller unit includes at least two compressors connected in parallel. The method includes: determining load information and load demand change information corresponding to the chiller unit; determining the total compressor frequency based on the load information; determining a target number of target compressors in the chiller unit based on the total compressor frequency and the load demand change information; determining a target individual compressor frequency based on the total compressor frequency and the target number, wherein the product of the target number and the target individual compressor frequency equals the total compressor frequency; and controlling the operation of each target compressor based on the target individual compressor frequency to evenly distribute the total compressor frequency to each target compressor. This can improve the overall operating efficiency of the chiller unit, avoid high-load operation of some compressors, and reduce noise.

Description

Technical Field

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

[0002] Multi-split central air conditioning is a type of user-owned central air conditioning system, commonly known as "one-to-many." It refers to a system where one outdoor unit is connected to two or more indoor units via piping. The outdoor unit uses air-cooled heat exchange, while the indoor units use direct evaporation heat exchange. Multi-split systems are increasingly widely used in small and medium-sized buildings and some public buildings.

[0003] Currently, multi-split air conditioning products on the market typically control the compressor's capacity output based on the indoor unit's capacity requirements when operating under partial load. Generally, the next compressor will only be started when one compressor outputs at a higher frequency but still cannot meet the indoor capacity requirements.

[0004] However, this control method for multi-unit systems often results in the units operating at relatively low efficiency, leading to a waste of electrical energy. Summary of the Invention

[0005] The purpose of this application is to provide a multi-unit air conditioning control method, device, electronic device, and storage medium to solve or partially solve the above-mentioned problems. The specific technical solution is as follows:

[0006] In a first aspect, this application provides a multi-unit control method for a chiller unit, the chiller unit comprising at least two compressors connected in parallel, including:

[0007] Determine the load information and load demand change information corresponding to the chiller unit;

[0008] The total frequency of the compressor is determined based on the load information;

[0009] Based on the total frequency of the compressors and the information on changes in load demand, a target number of target compressors is determined in the chiller unit.

[0010] The target single-unit frequency is determined based on the total frequency of the compressor and the target quantity, wherein the product of the target quantity and the target single-unit frequency is equal to the total frequency of the compressor.

[0011] The operation of each target compressor is controlled based on the target single-unit frequency, so as to evenly distribute the total frequency of the compressor to each target compressor.

[0012] In one possible implementation, determining the target number of target compressors in the chiller unit based on the total compressor frequency and the load demand change information includes:

[0013] If the total frequency of the compressor is less than a first threshold, a compressor in the chiller unit is identified as the target compressor based on the load demand change information.

[0014] If the total frequency of the compressor is greater than or equal to the first threshold and the total frequency of the compressor is less than or equal to the second threshold, each compressor currently operating in the chiller unit is identified as a target compressor.

[0015] If the total frequency of the compressor is greater than the second threshold, a preset number of compressors in the chiller unit are determined as the target compressors based on the load demand change information, and the preset number is greater than 1.

[0016] In one possible implementation, determining a compressor in the chiller unit as the target compressor based on the load demand change information includes:

[0017] If the load demand change information indicates that the chiller unit has a load demand, the compressor with the shortest running time in the chiller unit is identified as the target compressor.

[0018] If the load demand change information indicates an increase or decrease in load, the compressor currently operating in the chiller unit is identified as the target compressor.

[0019] In one possible implementation, determining a preset number of compressors as the target compressors in the chiller unit based on the load demand change information includes:

[0020] When the load demand change information indicates an increase in load or the chiller unit has just started, determine the number of systems included in the chiller unit, and based on the number of systems, determine a preset number of compressors in the chiller unit as the target compressors;

[0021] When the load demand change information indicates a load reduction, a preset number of compressors are selected as the target compressors from the currently operating compressors.

[0022] In one possible implementation, determining a preset number of compressors in the chiller unit based on the system quantity as the target compressors includes:

[0023] When the number of systems is one, determine the running time of each compressor in the chiller unit;

[0024] Sort all compressors in ascending order of their running time;

[0025] The compressors that are ranked first and the preset number are identified as target compressors.

[0026] In one possible implementation, determining a preset number of compressors in the chiller unit based on the system quantity as the target compressors includes:

[0027] When there are at least two systems, the operating state of each system is determined, and the system in the idle state is identified as the target system.

[0028] For each target system, the running time of each compressor in the target system is determined, and the compressor with the shortest running time is determined as the first compressor;

[0029] Determine a first quantity of the first compressor, and determine the difference between the preset quantity and the first quantity as a second quantity;

[0030] All non-operating compressors in the chiller unit, except for the first compressor, are identified as candidate compressors;

[0031] Determine the running time of each candidate compressor, and sort all candidate compressors in ascending order of running time;

[0032] The candidate compressor that ranks first and has the second number is determined as the second compressor;

[0033] The first compressor and the second compressor are identified as the target compressor.

[0034] In one possible implementation, the method further includes:

[0035] Get the preset single-machine frequency;

[0036] The preset quantity is determined based on the preset single-unit frequency and the total frequency of the compressor, so that the target single-unit frequency determined based on the preset quantity is greater than the preset single-unit frequency.

[0037] Secondly, this application provides a multi-unit air conditioning control device, comprising:

[0038] The information determination module is used to determine the load information and load demand change information corresponding to the chiller unit;

[0039] A total frequency determination module is used to determine the total frequency of the compressor based on the load information;

[0040] A compressor determination module is used to determine the target number of target compressors in the chiller unit based on the total frequency of the compressors and the load demand change information.

[0041] A single-unit frequency determination module is used to determine a target single-unit frequency based on the total frequency of the compressor and the target number, wherein the product of the target number and the target single-unit frequency is equal to the total frequency of the compressor;

[0042] The compressor operation module is used to control the operation of each target compressor based on the target single-unit frequency, so as to evenly distribute the total compressor frequency to each target compressor.

[0043] In one possible implementation, the compressor determining module is specifically used for:

[0044] If the total frequency of the compressor is less than a first threshold, a compressor in the chiller unit is identified as the target compressor based on the load demand change information.

[0045] If the total frequency of the compressor is greater than or equal to the first threshold and the total frequency of the compressor is less than or equal to the second threshold, each compressor currently operating in the chiller unit is identified as a target compressor.

[0046] If the total frequency of the compressor is greater than the second threshold, a preset number of compressors in the chiller unit are determined as the target compressors based on the load demand change information, and the preset number is greater than 1.

[0047] In one possible implementation, the compressor determining module is further configured to:

[0048] If the load demand change information indicates that the chiller unit has a load demand, the compressor with the shortest running time in the chiller unit is identified as the target compressor.

[0049] If the load demand change information indicates an increase or decrease in load, the compressor currently operating in the chiller unit is identified as the target compressor.

[0050] In one possible implementation, the compressor determining module is further configured to:

[0051] When the load demand change information indicates an increase in load or the chiller unit has just started, determine the number of systems included in the chiller unit, and based on the number of systems, determine a preset number of compressors in the chiller unit as the target compressors;

[0052] When the load demand change information indicates a load reduction, a preset number of compressors are selected as the target compressors from the currently operating compressors.

[0053] In one possible implementation, the compressor determining module is further configured to:

[0054] When the number of systems is one, determine the running time of each compressor in the chiller unit;

[0055] Sort all compressors in ascending order of their running time;

[0056] The compressors that are ranked first and the preset number are identified as target compressors.

[0057] In one possible implementation, the compressor determining module is further configured to:

[0058] When there are at least two systems, the operating state of each system is determined, and the system in the idle state is identified as the target system.

[0059] For each target system, the running time of each compressor in the target system is determined, and the compressor with the shortest running time is determined as the first compressor;

[0060] Determine a first quantity of the first compressor, and determine the difference between the preset quantity and the first quantity as a second quantity;

[0061] All non-operating compressors in the chiller unit, except for the first compressor, are identified as candidate compressors;

[0062] Determine the running time of each candidate compressor, and sort all candidate compressors in ascending order of running time;

[0063] The candidate compressor that ranks first and has the second number is determined as the second compressor;

[0064] The first compressor and the second compressor are identified as the target compressor.

[0065] In one possible implementation, the device further includes a frequency acquisition module for:

[0066] Get the preset single-machine frequency;

[0067] The preset quantity is determined based on the preset single-unit frequency and the total frequency of the compressor, so that the target single-unit frequency determined based on the preset quantity is greater than the preset single-unit frequency.

[0068] Thirdly, an electronic device is provided, including a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus;

[0069] Memory, used to store computer programs;

[0070] When a processor executes a program stored in memory, it implements any of the steps described in the first aspect.

[0071] Fourthly, a computer-readable storage medium is provided, characterized in that the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of any of the methods described in the first aspect.

[0072] Fifthly, a computer program product containing instructions is provided, which, when run on a computer, causes the computer to execute any of the multi-unit control methods described above.

[0073] Beneficial effects of the embodiments in this application:

[0074] This application provides a multi-split chiller control method, apparatus, electronic device, and storage medium. In this embodiment, the chiller unit includes at least two compressors connected in parallel. First, the load information and load demand change information corresponding to the chiller unit are determined, and the total compressor frequency is determined based on the load information. Then, based on the total compressor frequency and load demand change information, a target number of target compressors are determined in the chiller unit, and a target individual compressor frequency is determined based on the target number. Finally, the operation of each target compressor is controlled based on the target individual compressor frequency to evenly distribute the total compressor frequency to each target compressor. This solution can improve the overall operating efficiency of the chiller unit, thereby saving energy.

[0075] Of course, implementing any product or method of this application does not necessarily require achieving all of the advantages described above at the same time. Attached Figure Description

[0076] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0077] To more clearly illustrate the technical solutions in the embodiments of the present invention 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.

[0078] One or a number of embodiments are illustrated by way of example with the corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0079] Figure 1 A flowchart illustrating a multi-unit control method provided in this application embodiment;

[0080] Figure 2 This is a schematic diagram of the structure of a multi-unit control device provided in an embodiment of this application;

[0081] Figure 3 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0082] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0083] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0084] The following will describe in detail a multi-unit air conditioning control method provided in the embodiments of this application, with reference to specific implementation methods. Figure 1 As shown, the specific steps are as follows:

[0085] S101, determine the load information and load demand change information corresponding to the chiller unit.

[0086] This application provides a multi-split chiller control method applied to a chiller unit. The chiller unit may comprise one or more systems (multiple systems can be modularly combined for application). Each system consists of a conventional finned heat exchanger, a shell-and-tube evaporator, a compressor, and a throttling mechanism. Each system contains at least two compressors connected in parallel as the system's power source. That is, each system includes at least two compressors. Here, each compressor can be a fixed-frequency compressor or a variable-frequency compressor.

[0087] Load information is used to characterize the load magnitude corresponding to the chiller unit.

[0088] Load demand change information is used to characterize the load demand changes corresponding to the chiller unit, including three situations: there is load demand when the chiller unit is first started, the load increases after the chiller unit has been running for a while, and the load decreases after the chiller unit has been running for a while.

[0089] S102, determine the total frequency of the compressor based on the load information.

[0090] In practice, a table showing the correspondence between load and compressor frequency is prepared in advance based on experience. Generally, the higher the load, the higher the corresponding compressor frequency.

[0091] Based on this, in the embodiments of this application, the compressor frequency corresponding to the load information can be determined in the above correspondence table as the total compressor frequency.

[0092] S103, Based on the total frequency of the compressor and the load demand change information, determine the target number of target compressors in the chiller unit.

[0093] In this embodiment, the number of target compressors is determined by different strategies based on the total frequency of the compressor and the different load demand variations.

[0094] The specific method for determining the target number of compressors in the chiller unit based on the total compressor frequency and the load demand change information will be explained in detail in the following embodiments, and will not be elaborated here.

[0095] S104, determine the target single-unit frequency based on the total frequency of the compressor and the target quantity, wherein the product of the target quantity and the target single-unit frequency is equal to the total frequency of the compressor.

[0096] S105, based on the target single-unit frequency, control the operation of each target compressor to evenly distribute the total frequency of the compressor to each target compressor.

[0097] The following provides a unified explanation of S104 and S105:

[0098] In this embodiment, firstly, the target individual compressor frequency is obtained by dividing the total compressor frequency by the target number. Then, each target compressor is controlled to operate based on the target individual compressor frequency, thereby evenly distributing the total compressor frequency to each target compressor, that is, evenly distributing the load to each target compressor.

[0099] In applications, when the load demand information indicates an increase in load, there are situations where all currently running compressors are used as the target compressor for frequency increase, i.e., no new compressors are starting. In this case, the frequency can be increased to the target frequency by averaging the original operating frequency to each compressor at a rate of M (empirical value). This allows each compressor to increase its frequency to the target frequency at a relatively stable rate (M).

[0100] When the load demand change information indicates a decrease in load, and the engineering load demand is relatively large (e.g., the total compressor frequency is greater than 100 Hz), there is a possibility that all currently running compressors will be used as target compressors for frequency reduction. In this case, the frequency of the running compressors is reduced at an average rate of N (empirical value). When the frequency of each running compressor has decreased to a preset threshold (e.g., 100 Hz), the compressor that has been running the longest is shut down, and the frequency is evenly distributed to the remaining running compressors. This cycle continues until the last compressor is running. If the compressor still needs to reduce its frequency, it is shut down after reducing it to the minimum frequency. This allows each compressor to reduce its frequency at a relatively stable rate (N).

[0101] In this embodiment, the chiller unit includes at least two compressors connected in parallel. First, the load information and load demand change information corresponding to the chiller unit are determined, and the total frequency of the compressors is determined based on the load information. Then, based on the total compressor frequency and load demand change information, a target number of target compressors are determined in the chiller unit, and a target individual compressor frequency is determined based on the target number. Finally, the operation of each target compressor is controlled based on the target individual compressor frequency to evenly distribute the total compressor frequency to each target compressor. This solution improves the overall operating efficiency of the chiller unit, thereby saving energy. It also avoids some compressors operating at high loads, reducing noise and improving comfort. Furthermore, it prevents the problem of inconsistent high and low frequencies among the operating compressors within the unit, which could lead to repeated start-stop cycles due to low-frequency degradation, thus extending the service life of the chiller unit.

[0102] In another embodiment of this application, the specific implementation of S103 may include the following steps:

[0103] Step A1: If the total frequency of the compressor is less than the first threshold, a compressor in the chiller unit is determined as the target compressor based on the load demand change information.

[0104] Step A2: If the total frequency of the compressor is greater than or equal to the first threshold and the total frequency of the compressor is less than or equal to the second threshold, each compressor currently operating in the chiller unit is identified as a target compressor.

[0105] Step A3: If the total frequency of the compressor is greater than the second threshold, a preset number of compressors in the chiller unit are determined as the target compressors based on the load demand change information, and the preset number is greater than 1.

[0106] The first threshold (assumed to be Ahz) and the second threshold (assumed to be Bhz) are empirical values. Values ​​less than Ahz indicate a low load, requiring fewer compressors to operate. In this case, a single compressor is less efficient at both high and low frequencies, resulting in higher efficiency for a single compressor and a relatively low load, leading to higher unit efficiency. Values ​​greater than Bhz indicate a higher project load demand, where a single compressor is less efficient at both high and low frequencies. Distributing the load across multiple compressors avoids high-frequency operation of some compressors and also makes full use of the heat exchanger, further enhancing unit efficiency.

[0107] When the value is greater than Ahz and less than Bhz, it means that the allocation is prone to overflow. In this case, the current compressor start-up scheme can be continued, that is, the currently running compressor can continue to run, thereby avoiding multiple adjustments within a small range and improving system stability.

[0108] Understandably, when the total compressor frequency is less than the first threshold, the target quantity is one; when the total compressor frequency is greater than or equal to the first threshold and less than or equal to the second threshold, the number of compressors currently running in the chiller unit is the target quantity; when the total compressor frequency is greater than the second threshold, the preset quantity is the target quantity.

[0109] In one embodiment, the specific implementation of step A1 may include the following steps:

[0110] Step B1: If the load demand change information indicates that the chiller unit has a load demand, the compressor with the shortest running time in the chiller unit is identified as the target compressor.

[0111] Step B2: If the load demand change information indicates an increase or decrease in load, the compressor currently running in the chiller unit is identified as the target compressor.

[0112] In this embodiment, the load demand change information indicates the existence of load demand, which means that the chiller unit has just started. At this time, the compressor with the shortest running time is identified as the target compressor, thereby balancing the running time of each compressor in the chiller unit. When the load increases or decreases, the currently running compressor can be directly identified as the target compressor without restarting other compressors, thereby improving system stability.

[0113] In another embodiment, the specific implementation of step A3 may include the following steps:

[0114] Step C1: When the load demand change information indicates an increase in load or the chiller unit has just started, determine the number of systems included in the chiller unit, and based on the number of systems, determine a preset number of compressors in the chiller unit as the target compressors.

[0115] Step C2: When the load demand change information indicates a load reduction, a preset number of compressors are identified as the target compressors from the currently operating compressors.

[0116] In this embodiment, when the load demand change information indicates an increase in load or the chiller unit has just started, the target compressor can be determined based on the number of systems included in the chiller unit, thereby adapting to chiller units with different numbers of systems. When the load demand change information indicates a decrease in load, the target compressor can be selected only from the currently running compressors, thereby narrowing the scope of determination and saving computational load.

[0117] As one possible implementation, determining a preset number of compressors as the target compressors in the chiller unit based on the number of systems may include the following steps:

[0118] When there is only one system, the running time of each compressor in the chiller unit is determined. All compressors are then sorted in ascending order of their running time, and the preset number of compressors at the top of the sorted list are designated as target compressors. This scheme allows for the determination of target compressors based on running time for chiller units with only one system, thus balancing the running times of the various compressors.

[0119] As another possible implementation, determining a preset number of compressors as the target compressors in the chiller unit based on the number of systems may further include the following steps:

[0120] When there are at least two systems, the operating status of each system is determined, and the system in the idle state is identified as the target system. For each target system, the running time of each compressor in the target system is determined, and the compressor with the shortest running time is identified as the first compressor. A first number of first compressors is determined, and the difference between the preset number and the first number is identified as the second number. All non-operating compressors in the chiller unit other than the first compressor are identified as candidate compressors. The running time of each candidate compressor is determined, and all candidate compressors are sorted in ascending order of running time. The candidate compressor with the second number at the top of the sort is identified as the second compressor. The first compressor and the second compressor are identified as the target compressor.

[0121] This scheme allows for the selection of a short-running compressor as the target compressor within each currently idle compressor system for chiller units comprising multiple systems. Subsequently, a corresponding number of short-running compressors are selected from the remaining idle compressors as target compressors. This achieves a balance in the runtime of each system and each compressor.

[0122] Here, if the first quantity equals the preset quantity, there is no need to continue selecting the target compressor from other non-operating compressors; if the first quantity is greater than the preset quantity, the target compressor can be determined from the preset quantity of target systems with shorter operating times based on the operating time of each target system (using the operating time of the compressor with the shortest operating time as the operating time of the system).

[0123] If the sum of the first and second quantities is less than the preset quantity, then the compressor with the shorter running time among the other compressors can be further identified as the target compressor, so that the final number of target compressors is the preset quantity.

[0124] Furthermore, in another embodiment of this application, the preset quantity can be determined by the following steps: obtaining a preset single-unit frequency, and determining the preset quantity based on the preset single-unit frequency and the total frequency of the compressor, so that the target single-unit frequency determined based on the preset quantity is greater than the preset single-unit frequency. Wherein, if the compressor is a variable frequency compressor, the preset single-unit frequency is the optimal operating frequency of the compressor; if the compressor is a fixed frequency compressor, the preset single-unit frequency is the fixed operating frequency of the compressor.

[0125] In this embodiment, the total compressor frequency can be divided by a preset single-unit frequency. If the division is not even, the integer part of the result can be used as the preset quantity. If the division is even, the result can be subtracted by 1 to obtain the preset quantity. In this way, each compressor can operate at a target single-unit frequency higher than the optimal operating frequency during subsequent operation.

[0126] Based on the same technical concept, embodiments of this application also provide a multi-unit control device, such as... Figure 2 As shown, the device includes:

[0127] Information determination module 201 is used to determine the load information and load demand change information corresponding to the chiller unit;

[0128] Total frequency determination module 202 is used to determine the total frequency of the compressor based on the load information;

[0129] The compressor determination module 203 is used to determine the target number of target compressors in the chiller unit based on the total frequency of the compressors and the load demand change information.

[0130] The single-unit frequency determination module 204 is used to determine the target single-unit frequency based on the total frequency of the compressor and the target number, wherein the product of the target number and the target single-unit frequency is equal to the total frequency of the compressor;

[0131] The compressor operation module 205 is used to control the operation of each target compressor based on the target single-unit frequency, so as to evenly distribute the total compressor frequency to each target compressor.

[0132] In one possible implementation, the compressor determining module is specifically used for:

[0133] If the total frequency of the compressor is less than a first threshold, a compressor in the chiller unit is identified as the target compressor based on the load demand change information.

[0134] If the total frequency of the compressor is greater than or equal to the first threshold and the total frequency of the compressor is less than or equal to the second threshold, each compressor currently operating in the chiller unit is identified as a target compressor.

[0135] If the total frequency of the compressor is greater than the second threshold, a preset number of compressors in the chiller unit are determined as the target compressors based on the load demand change information, and the preset number is greater than 1.

[0136] In one possible implementation, the compressor determining module is further configured to:

[0137] If the load demand change information indicates that the chiller unit has a load demand, the compressor with the shortest running time in the chiller unit is identified as the target compressor.

[0138] If the load demand change information indicates an increase or decrease in load, the compressor currently operating in the chiller unit is identified as the target compressor.

[0139] In one possible implementation, the compressor determining module is further configured to:

[0140] When the load demand change information indicates an increase in load or the chiller unit has just started, determine the number of systems included in the chiller unit, and based on the number of systems, determine a preset number of compressors in the chiller unit as the target compressors;

[0141] When the load demand change information indicates a load reduction, a preset number of compressors are selected as the target compressors from the currently operating compressors.

[0142] In one possible implementation, the compressor determining module is further configured to:

[0143] When the number of systems is one, determine the running time of each compressor in the chiller unit;

[0144] Sort all compressors in ascending order of their running time;

[0145] The compressors that are ranked first and the preset number are identified as target compressors.

[0146] In one possible implementation, the compressor determining module is further configured to:

[0147] When there are at least two systems, the operating state of each system is determined, and the system in the idle state is identified as the target system.

[0148] For each target system, the running time of each compressor in the target system is determined, and the compressor with the shortest running time is determined as the first compressor;

[0149] Determine a first quantity of the first compressor, and determine the difference between the preset quantity and the first quantity as a second quantity;

[0150] All non-operating compressors in the chiller unit, except for the first compressor, are identified as candidate compressors;

[0151] Determine the running time of each candidate compressor, and sort all candidate compressors in ascending order of running time;

[0152] The candidate compressor that ranks first and has the second number is determined as the second compressor;

[0153] The first compressor and the second compressor are identified as the target compressor.

[0154] In one possible implementation, the device further includes a frequency acquisition module for:

[0155] Get the preset single-machine frequency;

[0156] The preset quantity is determined based on the preset single-unit frequency and the total frequency of the compressor, so that the target single-unit frequency determined based on the preset quantity is greater than the preset single-unit frequency.

[0157] In this embodiment, the chiller unit includes at least two compressors connected in parallel. First, the load information and load demand change information corresponding to the chiller unit are determined, and the total frequency of the compressors is determined based on the load information. Then, based on the total compressor frequency and load demand change information, a target number of target compressors are determined in the chiller unit, and a target individual compressor frequency is determined based on the target number. Finally, the operation of each target compressor is controlled based on the target individual compressor frequency to evenly distribute the total compressor frequency to each target compressor. This solution improves the overall operating efficiency of the chiller unit, thereby saving energy. It also avoids some compressors operating at high loads, reducing noise and improving comfort. Furthermore, it prevents the problem of inconsistent high and low frequencies among the operating compressors within the unit, which could lead to repeated start-stop cycles due to low-frequency degradation, thus extending the service life of the chiller unit.

[0158] Based on the same technical concept, embodiments of this application also provide an electronic device, such as... Figure 3 As shown, it includes a processor 111, a communication interface 112, a memory 113, and a communication bus 114, wherein the processor 111, the communication interface 112, and the memory 113 communicate with each other through the communication bus 114.

[0159] Memory 113 is used to store computer programs;

[0160] When processor 111 executes a program stored in memory 113, it performs the following steps:

[0161] Determine the load information and load demand change information corresponding to the chiller unit;

[0162] The total frequency of the compressor is determined based on the load information;

[0163] Based on the total frequency of the compressors and the information on changes in load demand, a target number of target compressors is determined in the chiller unit.

[0164] The target single-unit frequency is determined based on the total frequency of the compressor and the target quantity, wherein the product of the target quantity and the target single-unit frequency is equal to the total frequency of the compressor.

[0165] The operation of each target compressor is controlled based on the target single-unit frequency, so as to evenly distribute the total frequency of the compressor to each target compressor.

[0166] The communication bus mentioned in the above electronic devices can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in the diagram, but this does not mean that there is only one bus or one type of bus.

[0167] The communication interface is used for communication between the aforementioned electronic devices and other devices.

[0168] The memory may include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory may also be at least one storage device located remotely from the aforementioned processor.

[0169] The processors mentioned above can be general-purpose processors, including central processing units (CPUs), network processors (NPs), etc.; they can also be digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0170] In another embodiment provided in this application, a computer-readable storage medium is also provided, which stores a computer program that, when executed by a processor, implements the steps of any of the above-described multi-unit control methods.

[0171] In another embodiment provided in this application, a computer program product containing instructions is also provided, which, when run on a computer, causes the computer to execute any of the multi-unit control methods described above.

[0172] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across a target number of network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0173] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented using software plus a general-purpose hardware platform, or of course, using hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0174] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also mean including the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or a target number of other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a specific order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0175] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A multi-unit air conditioning control method, characterized in that, Applied to a chiller unit, the chiller unit comprising at least two compressors connected in parallel, the method includes: Determine the load information and load demand change information corresponding to the chiller unit; The total frequency of the compressor is determined based on the load information; Based on the total frequency of the compressors and the information on changes in load demand, a target number of target compressors is determined in the chiller unit. The target single-unit frequency is determined based on the total frequency of the compressor and the target quantity, wherein the product of the target quantity and the target single-unit frequency is equal to the total frequency of the compressor. The operation of each target compressor is controlled based on the target single-unit frequency, so as to evenly distribute the total frequency of the compressors to each target compressor; The step of determining the target number of compressors in the chiller unit based on the total compressor frequency and the load demand change information includes: When the total frequency of the compressor is greater than the second threshold, a preset number of compressors in the chiller unit are determined as the target compressors based on the load demand change information, and the preset number is greater than 1. The step of determining a preset number of compressors as the target compressors in the chiller unit based on the load demand change information includes: When the load demand change information indicates an increase in load or the chiller unit has just started, determine the number of systems included in the chiller unit; When there are at least two systems, the operating state of each system is determined, and the system in the idle state is identified as the target system. For each target system, the running time of each compressor in the target system is determined, and the compressor with the shortest running time is determined as the first compressor; Determine a first quantity of the first compressor, and determine the difference between the preset quantity and the first quantity as a second quantity; All non-operating compressors in the chiller unit, except for the first compressor, are identified as candidate compressors; Determine the running time of each candidate compressor, and sort all candidate compressors in ascending order of running time; The candidate compressor that ranks first and has the second number is determined as the second compressor; The first compressor and the second compressor are identified as the target compressor.

2. The method according to claim 1, characterized in that, The method of determining the target number of target compressors in the chiller unit based on the total frequency of the compressors and the load demand change information further includes: If the total frequency of the compressor is less than a first threshold, a compressor in the chiller unit is identified as the target compressor based on the load demand change information. If the total frequency of the compressor is greater than or equal to the first threshold and the total frequency of the compressor is less than or equal to the second threshold, each compressor currently operating in the chiller unit is identified as a target compressor.

3. The method according to claim 2, characterized in that, The step of determining a compressor in the chiller unit as the target compressor based on the load demand change information includes: If the load demand change information indicates that the chiller unit has a load demand, the compressor with the shortest running time in the chiller unit is identified as the target compressor. If the load demand change information indicates an increase or decrease in load, the compressor currently operating in the chiller unit is identified as the target compressor.

4. The method according to claim 1, characterized in that, The step of determining a preset number of compressors as the target compressors in the chiller unit based on the load demand change information further includes: When the load demand change information indicates a load reduction, a preset number of compressors are selected as the target compressors from the currently operating compressors.

5. The method according to claim 4, characterized in that, The method further includes: When the number of systems is one, determine the running time of each compressor in the chiller unit; Sort all compressors in ascending order of their running time; The compressors that are ranked first and the preset number are identified as target compressors.

6. The method according to claim 2, characterized in that, The method further includes: Get the preset single-machine frequency; The preset quantity is determined based on the preset single-unit frequency and the total frequency of the compressor, so that the target single-unit frequency determined based on the preset quantity is greater than the preset single-unit frequency.

7. A multi-unit air conditioning control device, characterized in that, The device includes: The information determination module is used to determine the load information and load demand change information corresponding to the chiller unit; A total frequency determination module is used to determine the total frequency of the compressor based on the load information; A compressor determination module is used to determine the target number of target compressors in the chiller unit based on the total frequency of the compressors and the load demand change information. A single-unit frequency determination module is used to determine a target single-unit frequency based on the total frequency of the compressor and the target number, wherein the product of the target number and the target single-unit frequency is equal to the total frequency of the compressor; The compressor operation module is used to control the operation of each target compressor based on the target single-unit frequency, so as to evenly distribute the total compressor frequency to each target compressor. Specifically, the compressor determination module is used for: When the total frequency of the compressor is greater than the second threshold, a preset number of compressors in the chiller unit are determined as the target compressors based on the load demand change information, and the preset number is greater than 1. The compressor determination module is further configured to: When the load demand change information indicates an increase in load or the chiller unit has just started, determine the number of systems included in the chiller unit; When there are at least two systems, the operating state of each system is determined, and the system in the idle state is identified as the target system. For each target system, the running time of each compressor in the target system is determined, and the compressor with the shortest running time is determined as the first compressor; Determine a first quantity of the first compressor, and determine the difference between the preset quantity and the first quantity as a second quantity; All non-operating compressors in the chiller unit, except for the first compressor, are identified as candidate compressors; Determine the running time of each candidate compressor, and sort all candidate compressors in ascending order of running time; The candidate compressor that ranks first and has the second number is determined as the second compressor; The first compressor and the second compressor are identified as the target compressor.

8. An electronic device, characterized in that, It includes a processor, a communication interface, a memory, and a communication bus, wherein the processor, the communication interface, and the memory communicate with each other through the communication bus; Memory, used to store computer programs; A processor, when executing a program stored in memory, implements the steps of the method according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method described in any one of claims 1-6.

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