Multi-split air conditioning system and control method thereof
By calculating the energy consumption coefficient of each indoor unit in a multi-split air conditioning system and the ratio of the system's energy consumption coefficient, the problem of accuracy in detecting abnormal energy consumption is solved, enabling timely detection and reduction of energy waste.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- QINGDAO HISENSE BOSCH AIR CONDITIONING SYSTEM CO LTD
- Filing Date
- 2024-10-30
- Publication Date
- 2026-05-01
AI Technical Summary
The accuracy of energy consumption anomaly detection in existing multi-split air conditioning systems is low, making it difficult to detect energy waste in a timely manner.
By obtaining the actual energy consumption and operating time of each indoor unit in operation, the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system are calculated, and the energy consumption anomaly is judged by combining the ratio of the two.
It improves the accuracy of energy consumption anomaly detection, reduces errors caused by fluctuations in other indoor units, and promptly detects and reduces energy waste.
Smart Images
Figure CN121953384A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of air conditioning technology, and in particular to a multi-split air conditioning system and its control method. Background Technology
[0002] With technological advancements, multi-split air conditioning systems are widely used in various settings, including entertainment venues, homes, and offices, due to their excellent energy-saving performance. However, multi-split air conditioning systems can still waste energy in certain situations, and this waste may be difficult to detect in a timely manner. For example, if the system continues to run while windows are open for ventilation, it will cause unnecessary energy waste. Another example is that clogged indoor heat exchangers can reduce their heat exchange efficiency, also leading to energy waste. Furthermore, due to the structural characteristics of multi-split air conditioning systems, if only one indoor unit is turned on, the outdoor unit's compressor still needs to operate, which also results in energy waste.
[0003] Currently, there are generally two methods for detecting energy consumption anomalies in multi-split air conditioning systems. One method relies on manual inspection, but this is complex because indoor units are often located indoors, while outdoor units may be on exterior walls or rooftops. The other method, while not relying on manual inspection, typically compares the operating data of the multi-split air conditioning system with its set parameters to determine if energy consumption is abnormal. However, the operating data of multi-split air conditioning systems is affected by various factors, and relying solely on operating data for energy consumption anomaly detection cannot guarantee accuracy.
[0004] Therefore, improving the accuracy of energy consumption anomaly detection for multi-split air conditioning systems has become an urgent technical problem to be solved. Summary of the Invention
[0005] This application provides a multi-split air conditioning system and its control method to improve the accuracy of energy consumption anomaly detection in multi-split air conditioning systems.
[0006] To achieve the above objectives, this application adopts the following technical solution.
[0007] In a first aspect, embodiments of this application provide a multi-split air conditioning system, which includes: multiple indoor units; an outdoor unit; and a controller configured to:
[0008] Obtain the actual energy consumption and operating time of each of the multiple indoor units that is in operation;
[0009] Based on the actual energy consumption and operating time of each indoor unit in operation, determine the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system; the target indoor unit is any indoor unit among all indoor units in operation.
[0010] Based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, the energy consumption test results of the target indoor unit are determined. The energy consumption test results are used to characterize whether the energy consumption of the target indoor unit is abnormal.
[0011] The technical solution provided in this application provides at least the following beneficial effects: Since the energy consumption coefficient of the target indoor unit is determined based on the actual energy consumption (energy consumption of any indoor unit of each type of indoor unit in operation) and the running time (running time of any indoor unit of each type of indoor unit in operation), when determining the energy consumption detection result of the target indoor unit based on the energy consumption coefficient of the target indoor unit, it not only depends on the actual energy consumption of the target indoor unit, but also can analyze the actual energy consumption of the target indoor unit from multiple aspects through the running time of the target indoor unit itself, so as to improve the accuracy of energy consumption anomaly detection.
[0012] Meanwhile, in multi-split air conditioning systems, all indoor units typically share the cooling or heating capacity of the same outdoor unit. When the load on one indoor unit changes, the operating status of the outdoor unit also adjusts accordingly. This interaction means that if the energy consumption of one indoor unit is abnormal, it will also affect the energy consumption of other indoor units. Therefore, in addition to determining the energy consumption coefficient of the target indoor unit, it is also necessary to determine the energy consumption coefficient of the multi-split air conditioning system. This allows for the detection of energy consumption anomalies in indoor units by understanding the relationship between the target indoor unit and the entire multi-split air conditioning system. This reduces errors caused by fluctuations in other indoor units, resulting in higher accuracy in energy consumption anomaly detection.
[0013] In some embodiments, determining the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system based on the actual energy consumption and operating time of each indoor unit in operation includes: determining the total actual energy consumption of all indoor units in operation based on the actual energy consumption of each indoor unit in operation; determining the predicted energy consumption of each indoor unit in operation based on the capacity and operating time of each indoor unit in operation, and determining the total predicted energy consumption of all indoor units in operation; determining the energy consumption coefficient of the target indoor unit based on the actual energy consumption and predicted energy consumption of the target indoor unit; and determining the energy consumption coefficient of the multi-split air conditioning system based on the total actual energy consumption and total predicted energy consumption of all indoor units in operation.
[0014] In some embodiments, the energy consumption test result of the target indoor unit is determined based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, including: when the ratio of the energy consumption coefficient of the target indoor unit to the energy consumption coefficient of the multi-split air conditioning system reaches a preset threshold, the energy consumption test result of the target indoor unit is determined to characterize the abnormal energy consumption of the target indoor unit.
[0015] In some embodiments, the energy consumption coefficient of the target indoor unit includes the actual energy consumption of the target indoor unit and the operating time of the target indoor unit. The energy consumption coefficient of the multi-split air conditioning system includes the total actual energy consumption of all indoor units in operation and the total operating time of all indoor units in operation. Based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, the energy consumption detection result of the target indoor unit is determined, including: determining a first ratio between the actual energy consumption of the target indoor unit and the total actual energy consumption of all indoor units in operation; determining a second ratio between the operating time of the target indoor unit and the total operating time of all indoor units in operation; and determining the energy consumption detection result of the target indoor unit according to the first ratio and the second ratio.
[0016] In some embodiments, the indoor unit includes an outdoor heat exchanger; the indoor unit includes: an indoor unit housing with a return air vent and an air outlet; an indoor heat exchanger disposed within the indoor unit housing; an electronic expansion valve disposed between the indoor heat exchanger and the outdoor heat exchanger for regulating the flow rate of refrigerant liquid between the indoor heat exchanger and the outdoor heat exchanger; a first temperature sensor disposed at the return air vent for detecting the indoor return air temperature; a second temperature sensor disposed at the air outlet for detecting the indoor air outlet temperature; the actual energy consumption of each indoor unit in operation is determined based on the energy consumption parameters of each indoor unit in operation, including: the current opening and total opening of the electronic expansion valve, the indoor return air temperature detected by the first temperature sensor, the indoor air outlet temperature detected by the second temperature sensor, the operating time of the indoor unit, the capacity of the indoor unit, and the operating mode of the indoor unit.
[0017] In some embodiments, the multi-split air conditioning system further includes: multiple wired controllers, with one wired controller corresponding to one indoor unit; the controller is further configured to: send the energy consumption detection result, the energy consumption coefficient of the target indoor unit, and the energy consumption coefficient of the multi-split air conditioning system to the target indoor unit, so that the wired controller corresponding to the target indoor unit displays the energy consumption detection result, the energy consumption coefficient of the target indoor unit, and the energy consumption coefficient of the multi-split air conditioning system.
[0018] Secondly, embodiments of this application provide a control method for a multi-split air conditioning system. The method includes: acquiring the actual energy consumption and operating time of each indoor unit in operation among a plurality of indoor units; determining the energy consumption coefficient of a target indoor unit and the energy consumption coefficient of the multi-split air conditioning system based on the actual energy consumption and operating time of each indoor unit in operation; the target indoor unit being any one of all indoor units in operation; and determining the energy consumption detection result of the target indoor unit based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, wherein the energy consumption detection result is used to characterize whether the energy consumption of the target indoor unit is abnormal.
[0019] Thirdly, embodiments of this application provide a controller, including: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes any of the control methods for multi-split air conditioning systems provided in the second aspect.
[0020] Fourthly, embodiments of this application provide a computer-readable storage medium including computer instructions that, when executed on a computer, cause the computer to perform any of the control methods for a multi-split air conditioning system provided in the second aspect.
[0021] Fifthly, embodiments of the present invention provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can realize any of the control methods for multi-split air conditioning systems provided in the second aspect.
[0022] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor, or it may be packaged separately from the controller's processor; this application does not impose any limitations on this.
[0023] The beneficial effects described in aspects two through five of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here. Attached Figure Description
[0024] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.
[0025] Figure 1 This is a schematic diagram of the composition of a multi-split air conditioning system provided in an embodiment of this application;
[0026] Figure 2 This is a schematic diagram of another multi-split air conditioning system provided in an embodiment of this application;
[0027] Figure 3 A schematic diagram of the refrigerant circulation loop of a multi-split air conditioning system provided in this application embodiment;
[0028] Figure 4 A flowchart illustrating a control method for a multi-split air conditioning system provided in this application embodiment;
[0029] Figure 5A flowchart illustrating another control method for a multi-split air conditioning system provided in this application embodiment;
[0030] Figure 6 A schematic diagram of a display interface provided in an embodiment of this application;
[0031] Figure 7 This is a schematic diagram of another display interface provided in an embodiment of this application;
[0032] Figure 8 A flowchart illustrating another control method for a multi-split air conditioning system provided in this application embodiment;
[0033] Figure 9 A flowchart illustrating another control method for a multi-split air conditioning system provided in this application embodiment;
[0034] Figure 10 A flowchart of another control method for a multi-split air conditioning system provided in an embodiment of this application. Detailed Implementation
[0035] 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, and 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.
[0036] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.
[0037] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.
[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.
[0039] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.
[0040] The following is a description of the technical terms used in this application.
[0041] A communication protocol is a set of rules and standards established in computer or network communication to enable different devices or systems to communicate with each other. It specifies the format, sequence, timing, error detection, and correction methods for data transmission, and is the foundation for data exchange and sharing. Protocols are divided into two main categories: hardware protocols and software protocols. Software protocols refer to communication specifications at the logical level.
[0042] Checksum: A checksum is an error detection method that generates a short, fixed-length checksum by processing the data using a specific algorithm. This checksum is appended to the end of the data. The receiver then processes the data using the same algorithm and compares it with the appended checksum to detect whether any errors have occurred during transmission.
[0043] In multi-split air conditioning systems, the energy consumption of each indoor unit is affected by various factors, including the unit's capacity and environmental conditions. These factors necessitate setting appropriate threshold values for each indoor unit when detecting energy consumption anomalies based solely on actual energy consumption. For example, larger-capacity indoor units tend to have higher energy consumption under the same operating conditions, thus requiring a higher threshold value. Conversely, smaller-capacity indoor units tend to have lower energy consumption under the same conditions, requiring a lower threshold value. However, these threshold values are often pre-set and cannot flexibly adapt to the different operating conditions of the indoor units, resulting in lower accuracy in detecting energy consumption anomalies in multi-split air conditioning systems.
[0044] Based on this, the embodiments of this application provide a control method for a multi-split air conditioning system. Since the energy consumption coefficient of the target indoor unit is determined based on the actual energy consumption (energy consumption of any indoor unit of each type of indoor unit in operation) and the operating time (operating time of any indoor unit of each type of indoor unit in operation), when determining the energy consumption detection result of the target indoor unit based on the energy consumption coefficient of the target indoor unit, it not only depends on the actual energy consumption of the target indoor unit, but also can analyze the actual energy consumption of the target indoor unit from multiple aspects through the operating time of the target indoor unit itself, so as to improve the accuracy of energy consumption anomaly detection.
[0045] Meanwhile, in multi-split air conditioning systems, all indoor units typically share the cooling or heating capacity of the same outdoor unit. When the load on one indoor unit changes, the operating status of the outdoor unit also adjusts accordingly. This interaction means that if the energy consumption of one indoor unit is abnormal, it will also affect the energy consumption of other indoor units. Therefore, in addition to determining the energy consumption coefficient of the target indoor unit, it is also necessary to determine the energy consumption coefficient of the multi-split air conditioning system. This allows for the detection of energy consumption anomalies in indoor units by understanding the relationship between the target indoor unit and the entire multi-split air conditioning system. This reduces errors caused by fluctuations in other indoor units, resulting in higher accuracy in energy consumption anomaly detection.
[0046] The following example illustrates the operating principle of a multi-split air conditioning system.
[0047] In this application, the multi-split air conditioning system executes a refrigeration cycle using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.
[0048] The compressor compresses refrigerant gas under high temperature and pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.
[0049] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve, returning the low-temperature, low-pressure refrigerant gas to the compressor. The evaporator achieves its cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the multi-split air conditioning system regulates the temperature of the indoor space.
[0050] The outdoor unit of a multi-split air conditioning system refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of a multi-split air conditioning system includes the indoor heat exchanger, and the expansion valve can be provided in either the indoor or outdoor unit.
[0051] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the multi-split air conditioning system acts as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the multi-split air conditioning system acts as a cooler in cooling mode.
[0052] Figure 1 This is a schematic diagram illustrating the composition of a multi-split air conditioning system provided in this application according to an exemplary embodiment. Figure 1 As shown, the multi-split air conditioning system 100 may include an outdoor unit 101. The outdoor unit 101 is typically installed outdoors and is used for heat exchange with the indoor environment.
[0053] In some embodiments, the multi-split air conditioning system 100 may include multiple indoor units 102. The multiple indoor units 102 can be connected to the outdoor unit 101 via a communication bus. The indoor units 102 may include various forms such as wall-mounted indoor units, ceiling-mounted indoor units, cabinet-type indoor units, and recessed indoor units. Figure 1 The indoor unit 102 shown is only an example, and this application does not specifically limit the form of the indoor unit 102.
[0054] In some embodiments, the multi-split air conditioning system may include a controller 103 ( Figure 1 (Not shown in the diagram), the controller 103 is communicatively connected to the outdoor unit 101 and the indoor unit 102. The controller 103 refers to a device that can generate operation control signals according to instruction operation codes and timing signals, instructing the multi-split air conditioning system 100 to execute control commands. For example, the controller 103 can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller 103 can also be other devices with processing functions, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.
[0055] In some embodiments, the controller 103 includes an outdoor control device built into the outdoor unit 101 and an indoor control device built into the indoor unit 102. These outdoor and indoor control devices are configured to be interconnected by signal lines and are capable of sending / receiving signals to each other.
[0056] The outdoor control device controls the compressor, expansion valve, and outdoor fan, etc. For example, the outdoor control device may include a processor, a memory, and a structure capable of controlling the outdoor unit 101 according to a program stored in the memory. The indoor control device controls the indoor fan, etc. For example, the indoor control device may include a processor and a memory 3, and a structure capable of controlling the indoor unit 102 according to a program stored in the memory.
[0057] In some embodiments, the outdoor unit 101 and indoor unit 102 connected to the communication bus can transmit data via a communication module. This communication module may include: a communication protocol for transmitting operating data (such as energy consumption parameters and operating time) from the indoor unit 102 to the outdoor unit 101, and a communication protocol for the outdoor unit to transmit energy consumption detection results from the indoor unit 102 to the indoor unit 102. Thus, through this communication module, the outdoor unit 101 can interact with the indoor unit 102.
[0058] Understandably, when communicating based on the communication protocol of this communication module, the transmitted data is encrypted, thus providing higher security.
[0059] In some possible embodiments, the outdoor control device can acquire the operating data of each indoor unit 102 in operation via a communication module, and based on the operating data of each indoor unit 102 in operation, determine the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, so as to perform energy consumption detection on the target indoor unit using the energy consumption coefficients of the target indoor unit and the multi-split air conditioning system. Furthermore, the outdoor control device can send the energy consumption detection results of the target indoor unit to the indoor unit 102 to issue a reminder to the user in the room where the indoor unit 102 is located.
[0060] In other possible embodiments, the indoor control device of each operating indoor unit 102 can determine the energy consumption coefficient of each operating indoor unit 102 based on its operating data. Then, the outdoor control device obtains the energy consumption coefficient of each operating indoor unit via a communication module, and determines the energy consumption coefficient of the target indoor unit and the multi-split air conditioning system based on these coefficients. This allows for energy consumption detection of the target indoor unit using both the energy consumption coefficients of the target indoor unit and the multi-split air conditioning system. Furthermore, the outdoor control device can send the energy consumption detection results of the target indoor unit to the indoor unit 102 to issue a reminder to the user in the room where the indoor unit 102 is located.
[0061] It should be noted that, based on the above-described data interaction embodiment between outdoor unit 101 and indoor unit 102, it can be understood that the process of detecting the energy consumption of the target indoor unit can be performed by the outdoor control device, or it can be performed by only the indoor control device and the outdoor control device. Therefore, for ease of description, the following describes the controller 103 performing the control method of the multi-split air conditioning system provided in this application.
[0062] In some embodiments, such as Figure 2 As shown, the multi-split air conditioning system also includes multiple wired controllers 201, with one wired controller 201 corresponding to each indoor unit 102. The wired controller 201 has the function of communicating with the controller 103, for example, using infrared or other communication methods. The wired controller 201 allows the user to perform various controls on the multi-split air conditioning system 100, enabling interaction between the user and the multi-split air conditioning system 100.
[0063] In some embodiments, based on Figure 2 The multi-split air conditioning system shown may further include a communication module that allows the indoor unit 102 to transmit abnormal information of the multi-split air conditioning system 100 to the corresponding wired controller 201. Through this communication module, the indoor unit 102 can interact with the corresponding wired controller 201.
[0064] For example, after the indoor unit 102 receives the energy consumption detection result of the target indoor unit sent by the controller 103, it can send the energy consumption detection result to the wired controller 201 corresponding to the target indoor unit through the communication module, so as to send a reminder to the user in the room where the indoor unit 102 is located through the wired controller 201 corresponding to the target indoor unit.
[0065] Figure 3 This is a schematic diagram of the refrigerant circulation loop of a multi-split air conditioning system provided in this application according to an exemplary embodiment. Figure 3 As shown, the refrigerant circuit may include a compressor 301. The compressor 301 draws in refrigerant through a suction port and discharges the internally compressed refrigerant to the indoor heat exchanger 302 through a discharge port. For example, the compressor 301 may be a variable-capacity inverter compressor with inverter-based speed control.
[0066] In some embodiments, the refrigerant circuit may include an indoor heat exchanger 302. The indoor heat exchanger 302 has a second inlet for allowing liquid refrigerant to flow between it and an electronic expansion valve 304, and a first inlet for allowing gaseous refrigerant to flow between it and the outlet of the compressor 301. The indoor heat exchanger 302 facilitates heat exchange between refrigerant flowing in a heat transfer tube connected between the second and first inlets of the indoor heat exchanger 302 and indoor air.
[0067] In some embodiments, the refrigerant circuit may include an outdoor heat exchanger 303. The outdoor heat exchanger 303 has a first inlet / outlet for allowing refrigerant to flow through a receiver 305 between itself and the suction port of the compressor 301, and a second inlet / outlet for allowing refrigerant to flow between itself and an electronic expansion valve 304. The outdoor heat exchanger 303 facilitates heat exchange between the refrigerant flowing in a heat transfer tube connected between the second and first inlets / outlets of the outdoor heat exchanger 303 and outdoor air.
[0068] In some embodiments, the refrigerant circuit may include an electronic expansion valve 304. The electronic expansion valve 304 is disposed between the outdoor heat exchanger 303 and the indoor heat exchanger 302. The electronic expansion valve 304 has the function of expanding and depressurizing the refrigerant flowing between the outdoor heat exchanger 303 and the indoor heat exchanger 302. The electronic expansion valve 304 is configured to change its opening degree; by decreasing the opening degree, the flow resistance of the refrigerant flowing through the electronic expansion valve 304 increases, and by increasing the opening degree, the flow resistance of the refrigerant flowing through the electronic expansion valve 304 decreases. Such an electronic expansion valve 304 expands and depressurizes the refrigerant flowing from the indoor heat exchanger 302 towards the outdoor heat exchanger 303 during heating operation. Furthermore, even if the states of other devices installed in the refrigerant circuit remain unchanged, the flow rate of the refrigerant flowing in the refrigerant circuit will change when the opening degree of the electronic expansion valve 304 changes.
[0069] In some embodiments, the refrigerant circuit may include a receiver 305. The receiver 305 is disposed between the outdoor heat exchanger 303 and the suction port of the compressor 301. In the receiver 305, the refrigerant flowing from the outdoor heat exchanger 303 to the compressor 301 is separated into gaseous refrigerant and liquid refrigerant. Furthermore, gaseous refrigerant is primarily supplied from the receiver 305 to the suction port of the compressor 301.
[0070] In some embodiments, the multi-split air conditioning system 100 may include an indoor unit housing. The indoor unit housing has a return air vent and an air outlet for accommodating an indoor heat exchanger.
[0071] In some embodiments, the multi-split air conditioning system 100 may include a first temperature sensor. The first temperature sensor is disposed at the return air vent and is used to detect the indoor return air temperature.
[0072] In some embodiments, the multi-split air conditioning system 100 may include a second temperature sensor. The second temperature sensor is disposed at the air outlet and is used to detect the indoor air outlet temperature.
[0073] In some embodiments, the multi-split air conditioning system 100 may include a communicator. The communicator is used to establish communication connections with other network entities, such as with terminal devices. The communicator may include a radio frequency (RF) module, a cellular module, a wireless fidelity (WIFI) module, and a GPS module, etc. Taking an RF module as an example, the RF module can be used for signal reception and transmission; specifically, it sends received information to the controller 103 for processing; additionally, it transmits signals generated by the controller 103. Typically, the RF circuit may include, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier (LNA), a duplexer, etc.
[0074] In some embodiments, the multi-split air conditioning system 100 may include a memory. The memory can be used to store software programs and data. The controller 103 executes various functions of the multi-split air conditioning system and performs data processing by running the software programs or data stored in the memory. The memory may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. The memory stores an operating system that enables the multi-split air conditioning system to run. In this application, the memory may store the operating system and various application programs, and may also store code that executes the control methods of the multi-split air conditioning system provided in the embodiments of this application.
[0075] Those skilled in the art will understand that the hardware structure shown in the above embodiments does not constitute a limitation on the multi-split air conditioning system. The multi-split air conditioning system may include more or fewer components than shown, or combine certain components, or have different component arrangements.
[0076] Understandably, if a multi-split air conditioning system continues to operate under abnormal energy consumption conditions, it will lead to energy waste. Therefore, it is necessary to conduct timely and accurate energy consumption anomaly detection on multi-split air conditioning systems so that measures can be taken promptly to address the anomalies and reduce the resulting energy waste.
[0077] Based on this, this application provides a control method for a multi-split air conditioning system according to an exemplary embodiment, which can detect abnormal energy consumption in the multi-split air conditioning system. Specifically, as follows... Figure 4 As shown, the controller can be configured to perform the following operations to detect energy consumption anomalies in a multi-split air conditioning system.
[0078] S101. Obtain the actual energy consumption and running time of each indoor unit that is in operation among multiple indoor units.
[0079] In some possible embodiments, the energy consumption parameters of each indoor unit in operation can be obtained, and then the actual energy consumption of each indoor unit in operation can be determined based on the energy consumption parameters of each indoor unit in operation. The energy consumption parameters include: the current and total opening degree of the electronic expansion valve, the indoor return air temperature detected by the first temperature sensor, the indoor outlet air temperature detected by the second temperature sensor, the operating time of the indoor unit, the capacity of the indoor unit, and the operating mode of the indoor unit.
[0080] The following is as follows Figure 5 As shown, this example illustrates the complete process of obtaining the energy consumption parameters of each indoor unit in operation.
[0081] Step a1: The outdoor unit receives the data packets sent by the indoor unit.
[0082] Determine if the ID of the indoor unit in the data packet is less than the number of indoor units.
[0083] If so, repeat step a1.
[0084] If not, proceed to step a2 below.
[0085] In some possible embodiments, before receiving the operating data sent by the indoor unit, the outdoor control device can first determine whether the connection between the indoor and outdoor units is normal, and whether the multi-split air conditioning system has started and is operating normally. If the connection between the indoor and outdoor units is normal, and the multi-split air conditioning system has started and is operating normally, the outdoor control device receives the operating data sent by the indoor unit. In this way, when the communication connection between the indoor and outdoor units is stable and the multi-split air conditioning system is operating normally, the operating data is less likely to be interfered with or damaged during transmission, thus ensuring the integrity of the operating data.
[0086] Step a2: The outdoor unit parses the checksum included in the data packet.
[0087] Determine if the checksum is correct.
[0088] If so, proceed to step a3 below.
[0089] If not, repeat step a1 above.
[0090] Step a3: The outdoor unit saves the energy consumption parameters of the indoor unit included in the data packet.
[0091] The aforementioned data packet includes: packet header, sender identifier, receiver identifier, data length, data area, and checksum.
[0092] The packet header consists of 2 bytes and can be set to hexadecimal, such as 0XAA or 0X55.
[0093] The transmitter identifier consists of 1 byte and can represent the ID information of the transmitting device, such as the ID of the outdoor unit, the ID of the indoor unit, and the ID of the wired controller. Specifically, 0XFF can be used to represent the ID of the outdoor unit, 0X01 to 0X20 can be used to represent the ID of the indoor unit (0X01 corresponds to indoor unit 1, 0X20 corresponds to indoor unit 2), and 0X61 to 0X80 can be used to represent the wired controller corresponding to the indoor unit (0X61 corresponds to wired controller 1 for indoor unit 1, 0X80 corresponds to wired controller 32 for indoor unit 32).
[0094] The receiver identifier consists of 1 byte and can represent the receiving device ID information. For example, the ID of the outdoor unit, the ID of the indoor unit, and the ID of the wired controller. Specifically, 0XFF can be used to represent the ID of the outdoor unit, 0X01 to 0X20 can be used to represent the ID of the indoor unit (0X01 corresponds to indoor unit 1, 0X20 corresponds to indoor unit 2), and 0X61 to 0X80 can be used to represent the wired controller corresponding to the indoor unit (0X61 corresponds to wired controller 1 for indoor unit 1, 0X80 corresponds to wired controller 32 for indoor unit 32).
[0095] The data length consists of 1 byte and can represent the data length of a data area. For example, 0X01 can represent a data area with a data length of 1 byte, and 0X05 can represent a data area with a data length of 5 bytes.
[0096] The data area consists of N bytes, and can be composed of different data depending on communication needs. For example, the data area in a data packet sent from the indoor unit to the outdoor unit can consist of the indoor unit's capacity, operating status, electronic expansion valve opening, return air temperature, outlet air temperature, and operating mode. Alternatively, the data area in a data packet sent from the outdoor unit to the indoor unit can consist of energy consumption detection results, a first energy consumption index, and a second energy consumption index. The data area in a data packet sent from the indoor unit to the corresponding wired controller can consist of energy consumption detection results, a first energy consumption index, and a second energy consumption index.
[0097] The checksum consists of 2 bytes and can be obtained by using the CRC checksum algorithm to verify all bytes from the packet header to the data area.
[0098] The following example illustrates the process of determining the actual energy consumption of each indoor unit in operation based on its energy consumption parameters.
[0099] When the indoor unit is in cooling mode, the actual energy consumption of each indoor unit in operation can be determined based on the following formula (1).
[0100] A i =∑C i X(E i / EA i )x(TIN i -Tout i )x T i Formula (1)
[0101] Among them, A i Energy consumption of the indoor unit; C i For the capacity of the indoor unit; E i EA represents the current opening degree of the electronic expansion valve. i TIN is the total opening degree of the electronic expansion valve. i Tout refers to the indoor return air temperature. i T represents the indoor air outlet temperature. i is the running time of the indoor unit; i is used to represent the i-th indoor unit among multiple indoor units.
[0102] When the indoor unit is in heating mode, the actual energy consumption of each indoor unit in operation can be determined based on the following formula (2).
[0103] A i =∑C i X(E i / EA i )x(Tout i -TIN i )x T i Formula (2)
[0104] Among them, A i Energy consumption of the indoor unit; C i For the capacity of the indoor unit; E i EA represents the current opening degree of the electronic expansion valve. i TIN is the total opening degree of the electronic expansion valve. i Tout refers to the indoor return air temperature. i T represents the indoor air outlet temperature. i is the running time of the indoor unit; i is used to represent the i-th indoor unit among multiple indoor units.
[0105] In other possible embodiments, a corresponding electricity meter can be installed for each indoor unit of the multi-split air conditioning system, so that the energy consumption of each indoor unit in operation can be statistically analyzed through the electricity meter. By reading the electricity meter reading, the actual energy consumption of each indoor unit in operation can be obtained.
[0106] S102. Based on the actual energy consumption and operating time of each indoor unit in operation, determine the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system.
[0107] The target indoor unit is any one of the indoor units that is in operation.
[0108] In some possible embodiments, a baseline value for each indoor unit in operation can be determined based on the operating time of each indoor unit in a running state. Then, based on the deviation between the actual energy consumption of each indoor unit in operation and the baseline value, the energy consumption coefficient (EFC) of the target indoor unit and the EFC of the multi-split air conditioning system can be determined. The baseline value can be determined based on the operating time of each indoor unit in operation. For example, the baseline value can be the operating time of each indoor unit in operation. Alternatively, the baseline value can be the predicted energy consumption of each indoor unit in operation, determined based on its operating time.
[0109] Understandably, if the deviation between the actual energy consumption of the indoor unit and the benchmark value exceeds a suitable range, it indicates an abnormal energy consumption of the indoor unit. Therefore, energy consumption anomalies can be detected based on the deviation between the actual energy consumption and the benchmark value. Furthermore, this benchmark value is dynamically determined based on the indoor unit's own operating time. This means that as the indoor unit's load and other operating conditions change, a more accurate benchmark value will be obtained, thus avoiding misjudgments caused by a fixed benchmark value. Therefore, it is necessary to determine the energy consumption coefficient of the target indoor unit in order to detect energy consumption anomalies based on the target indoor unit's energy consumption coefficient.
[0110] Meanwhile, in multi-split air conditioning systems, all indoor units typically share the cooling or heating capacity of the same outdoor unit. When the load on one indoor unit changes, the operating status of the outdoor unit also adjusts accordingly. This interaction means that if the energy consumption of one indoor unit is abnormal, it will also affect the energy consumption of other indoor units. Therefore, in addition to determining the energy consumption coefficient (EDC) of the target indoor unit, it is also necessary to determine the EDC of the entire multi-split air conditioning system. By analyzing the relationship between the deviation value corresponding to the target indoor unit and the deviation value corresponding to the entire multi-split air conditioning system, energy consumption anomalies in indoor units can be detected. This reduces the errors caused by fluctuations in other indoor units, making the detection of energy consumption anomalies more accurate.
[0111] S103. Based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, determine the energy consumption test result of the target indoor unit.
[0112] Among them, the energy consumption test results are used to characterize whether the energy consumption of the target indoor unit is abnormal.
[0113] In some possible embodiments, there is a preset correspondence between the energy consumption coefficient of the target indoor unit, the energy consumption coefficient of the multi-split air conditioning system, and the energy consumption test results. Therefore, the energy consumption test results of the target indoor unit can be determined based on the preset correspondence between the energy consumption coefficient of the target indoor unit, the energy consumption coefficient of the multi-split air conditioning system, and the energy consumption test results.
[0114] In other possible embodiments, the ratio between the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system can be determined. If the ratio between the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system reaches a preset threshold, the energy consumption detection result of the target indoor unit is used to characterize the abnormal energy consumption of the target indoor unit. For example, the preset threshold can be 1.5.
[0115] If the ratio between the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system does not reach the preset threshold, the energy consumption test result of the target indoor unit is used to characterize the normal energy consumption of the target indoor unit.
[0116] The ratio of the energy consumption coefficient of the target indoor unit to the energy consumption coefficient of the multi-split air conditioning system reaching the preset threshold can mean that the ratio of the energy consumption coefficient of the target indoor unit to the energy consumption coefficient of the multi-split air conditioning system is greater than the preset threshold, or it can mean that the ratio of the energy consumption coefficient of the target indoor unit to the energy consumption coefficient of the multi-split air conditioning system is greater than or equal to the preset threshold. This application does not make a specific limitation in this regard.
[0117] Understandably, if the ratio between the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system reaches a preset threshold, it indicates that the actual energy consumption ratio of the target indoor unit in the multi-split air conditioning system far exceeds the benchmark ratio of the target indoor unit in the multi-split air conditioning system, thus confirming that the actual energy consumption of the target indoor unit is abnormal.
[0118] In some embodiments, after determining the energy consumption detection result of the target indoor unit, the energy consumption detection result, the energy consumption coefficient of the target indoor unit, and the energy consumption coefficient of the multi-split air conditioning system can be sent to the target indoor unit so that the wired controller corresponding to the target indoor unit can display the energy consumption detection result, the energy consumption coefficient of the target indoor unit, and the energy consumption coefficient of the multi-split air conditioning system. For example, as Figure 6 As shown, the display screen of the wired controller corresponding to the target indoor unit can display "Energy consumption coefficient of the target indoor unit: 2.5", "Energy consumption coefficient of the multi-split air conditioning system: 1.2", and "Warning! The energy consumption of the target indoor unit is abnormal. Please pay attention to whether the windows have been open for a long time!" This can remind the user that the energy consumption of the target indoor unit is abnormal and remind the user to check whether the windows have been open for a long time.
[0119] Based on the above embodiments, after determining the energy consumption detection result of the target indoor unit, the actual energy consumption of the target indoor unit and the baseline value determined based on the operating time of the target indoor unit can also be sent to the target indoor unit, so that the wired controller corresponding to the target indoor unit can also display the actual energy consumption and the baseline value of the target indoor unit. For example, as Figure 7As shown, the display screen of the wired controller corresponding to the target indoor unit can also display "Actual energy consumption of the target indoor unit: 50" and "Base value of the target indoor unit: 20".
[0120] In some embodiments, after sending the energy consumption detection results, the first energy consumption coefficient, and the second energy consumption coefficient to the target indoor unit, the buzzer on the wired controller can be controlled to emit an audible reminder to remind maintenance personnel or users to perform maintenance.
[0121] The following is as follows Figure 8 As shown, this example illustrates the complete process for detecting energy consumption anomalies in a multi-split air conditioning system.
[0122] Step b1: Power on and run the multi-split air conditioning system.
[0123] Step b2: The indoor unit sends its operating data to the outdoor unit.
[0124] Step b3: The outdoor unit performs energy consumption anomaly detection based on the indoor unit's operating data.
[0125] Determine if there are indoor units with abnormal energy consumption.
[0126] If so, proceed to step b4 below.
[0127] If not, repeat step b3.
[0128] Step b4: The outdoor unit sends the energy consumption detection results to the corresponding indoor unit with abnormal energy consumption.
[0129] Step b5: The wired controller corresponding to the indoor unit with abnormal energy consumption displays the energy consumption detection results.
[0130] Step b6: The wired controller corresponding to the indoor unit with abnormal energy consumption issues an early warning prompt, so that maintenance personnel can repair the indoor unit with abnormal energy consumption.
[0131] Based on S101-S103, this application provides a control method for a multi-split air conditioning system. Since the energy consumption coefficient of the target indoor unit is determined based on the actual energy consumption (actual energy consumption of any indoor unit in each operating state) and the running time (running time of any indoor unit in each operating state), when determining the energy consumption detection result of the target indoor unit based on the energy consumption coefficient of the target indoor unit, it not only depends on the actual energy consumption of the target indoor unit, but also can analyze the actual energy consumption of the target indoor unit from multiple aspects through the running time of the target indoor unit itself, so as to improve the accuracy of energy consumption anomaly detection.
[0132] Meanwhile, in multi-split air conditioning systems, all indoor units typically share the cooling or heating capacity of the same outdoor unit. When the load on one indoor unit changes, the operating status of the outdoor unit also adjusts accordingly. This interaction means that if the energy consumption of one indoor unit is abnormal, it will also affect the energy consumption of other indoor units. Therefore, in addition to determining the energy consumption coefficient of the target indoor unit, it is also necessary to determine the energy consumption coefficient of the multi-split air conditioning system. This allows for the detection of energy consumption anomalies in indoor units by understanding the relationship between the target indoor unit and the entire multi-split air conditioning system. This reduces errors caused by fluctuations in other indoor units, resulting in higher accuracy in energy consumption anomaly detection.
[0133] In addition, the present application provides a control method for a multi-split air conditioning system, which does not require additional hardware equipment or increased installation and commissioning work, and thus does not affect the original operation and control of the multi-split air conditioning system.
[0134] In some embodiments, where the baseline value of the target indoor unit is a predicted energy consumption determined based on the operating time of the target indoor unit, in order to determine the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, the controller may be configured to perform the following operations:
[0135] S201. Based on the actual energy consumption of each indoor unit in operation, determine the total actual energy consumption of all indoor units in operation.
[0136] For example, the total actual energy consumption of all indoor units in operation can be determined based on the following formula (3).
[0137] A = A1 + A2 + A3 + A4 + A5 + ... + A i Formula (3)
[0138] Where A represents the total actual energy consumption of all indoor units in operation; A i Let be the actual energy consumption of the i-th indoor unit among multiple indoor units, where i = 1, 2, 3, 4, 5, ...
[0139] S202. Based on the running time of each indoor unit in operation, determine the predicted energy consumption of each indoor unit in operation, and determine the total predicted energy consumption of all indoor units in operation.
[0140] For example, the predicted energy consumption of each indoor unit in operation can be determined based on the following formula (4).
[0141] B i =∑C i ×T i Formula (4)
[0142] Among them, B iThis represents the total actual energy consumption of the indoor unit.
[0143] For example, the total predicted energy consumption of all indoor units in operation can be determined based on the following formula (5).
[0144] B = B1 + B2 + B3 + B4 + B5 + ... + B i Formula (5)
[0145] Where B is the total predicted energy consumption of all indoor units in operation; B i Let i be the predicted energy consumption of the i-th indoor unit among multiple indoor units, where i = 1, 2, 3, 4, 5, ...
[0146] S203. Based on the actual energy consumption of the target indoor unit and the predicted energy consumption of the target indoor unit, determine the energy consumption coefficient of the target indoor unit.
[0147] In some possible embodiments, the ratio between the actual energy consumption of the target indoor unit and the predicted energy consumption of the target indoor unit can be determined as the energy consumption coefficient of the target indoor unit.
[0148] For example, the energy consumption coefficient of the target indoor unit can be determined based on the following formula (6).
[0149] P i =A i / B i Formula (6)
[0150] Among them, P i The energy efficiency ratio (EER) of the indoor unit; A i B represents the actual energy consumption of the indoor unit. i This is the predicted energy consumption of the indoor unit.
[0151] In other possible embodiments, the difference between the actual energy consumption of the target indoor unit and the predicted energy consumption of the target indoor unit can be determined as the energy consumption coefficient of the target indoor unit.
[0152] S204. Based on the total actual energy consumption of all indoor units in operation and the total predicted energy consumption of all indoor units in operation, determine the energy consumption coefficient of the multi-split air conditioning system.
[0153] In some possible embodiments, the ratio between the total actual energy consumption of all indoor units in operation and the total predicted energy consumption of all indoor units in operation can be determined as the energy consumption coefficient of the multi-split air conditioning system.
[0154] In other possible embodiments, the difference between the total actual energy consumption of all indoor units in operation and the total predicted energy consumption of all indoor units in operation can be determined as the energy consumption coefficient of the multi-split air conditioning system.
[0155] The following is as follows Figure 9 As shown, in conjunction with the embodiments shown in S201-S204, the complete process for detecting energy consumption anomalies in a multi-split air conditioning system is illustrated by way of example.
[0156] Step c1: Begin determining the energy consumption factor (EDP) of the indoor unit and the EDP of the air conditioning system.
[0157] Determine if the ID of the target indoor unit is less than the number of indoor units.
[0158] If so, proceed to step c2 below.
[0159] If not, repeat step c1.
[0160] Step c2: Determine the actual energy consumption of the target indoor unit.
[0161] Step c3: Determine the predicted energy consumption of the target indoor unit.
[0162] Step c4: Determine the energy consumption coefficient of the target indoor unit.
[0163] Step c5: Determine the total actual energy consumption of all indoor units that are in operation.
[0164] Step c6: Determine the total predicted energy consumption of all indoor units that are in operation.
[0165] Step c7: Determine the energy consumption coefficient of the multi-split air conditioning system.
[0166] Step c8: Compare the ratio between the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system with the preset threshold.
[0167] Determine whether the ratio is greater than a preset threshold.
[0168] If so, proceed to step c9 below.
[0169] If not, repeat step c1.
[0170] Step c9: Determine the abnormal energy consumption of the target indoor unit.
[0171] In other embodiments, where the reference value for the target indoor unit is the operating time of the target indoor unit, in order to determine the energy consumption factor of the target indoor unit and the energy consumption factor of the multi-split air conditioning system, the controller may also be configured to perform the following operations, namely: Figure 10 As shown, step S102 can also be implemented as follows.
[0172] S301. Based on the actual energy consumption of each indoor unit in operation, determine the total actual energy consumption of all indoor units in operation.
[0173] The description in S201 above can be referred to here, and will not be repeated here.
[0174] S302. Based on the actual running time of each indoor unit in operation, determine the total running time of all indoor units in operation.
[0175] S303. Based on the actual energy consumption and operating time of the target indoor unit, determine the energy consumption coefficient of the target indoor unit.
[0176] In some possible embodiments, the ratio between the actual energy consumption of the target indoor unit and the operating time of the target indoor unit can be determined as the energy consumption coefficient of the target indoor unit.
[0177] In other possible embodiments, the difference between the actual energy consumption of the target indoor unit and the operating time of the target indoor unit can be determined as the energy consumption factor of the target indoor unit.
[0178] S304. Based on the total actual energy consumption of all indoor units in operation and the total operating time of all indoor units in operation, determine the energy consumption coefficient of the multi-split air conditioning system.
[0179] In some possible embodiments, the ratio between the total actual energy consumption of all indoor units in operation and the total operating time of all indoor units in operation can be determined as the energy consumption coefficient of the multi-split air conditioning system.
[0180] In other possible embodiments, the difference between the total actual energy consumption of all indoor units in operation and the total operating time of all indoor units in operation can be determined as the energy consumption coefficient of the multi-split air conditioning system.
[0181] It should be noted that, since the control method for a multi-split air conditioning system provided in this application according to the exemplary embodiment can be continuously iterated, the accuracy of energy consumption anomaly detection for the multi-split air conditioning system can be improved.
[0182] Those skilled in the art will recognize that, in one or more of the examples above, the functions described in this invention can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer.
[0183] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions 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.
Claims
1. A multi-split air conditioning system, characterized in that, include: Multiple indoor units; Outdoor unit; The controller is configured as follows: Obtain the actual energy consumption and operating time of each of the multiple indoor units that is in operation; Based on the actual energy consumption and operating time of each indoor unit in operation, the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system are determined. The target indoor unit is any one of all indoor units that are in operation; Based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, the energy consumption detection result of the target indoor unit is determined, and the energy consumption detection result is used to characterize whether the energy consumption of the target indoor unit is abnormal.
2. The multi-split air conditioning system according to claim 1, characterized in that, The determination of the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system based on the actual energy consumption and operating time of each indoor unit in operation includes: Based on the actual energy consumption of each indoor unit in operation, determine the total actual energy consumption of all indoor units in operation. Based on the running time of each indoor unit in operation, the predicted energy consumption of each indoor unit in operation is determined, and the total predicted energy consumption of all indoor units in operation is determined. Based on the actual energy consumption of the target indoor unit and the predicted energy consumption of the target indoor unit, the energy consumption coefficient of the target indoor unit is determined; The energy consumption coefficient of the multi-split air conditioning system is determined based on the total actual energy consumption of all indoor units in operation and the total predicted energy consumption of all indoor units in operation.
3. The multi-split air conditioning system according to claim 1, characterized in that, The determination of the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system based on the actual energy consumption and operating time of each indoor unit in operation includes: Based on the actual energy consumption of each indoor unit in operation, determine the total actual energy consumption of all indoor units in operation. Based on the runtime of each indoor unit in operation, determine the total runtime of all indoor units in operation; Based on the actual energy consumption of the target indoor unit and the operating time of the target indoor unit, the energy consumption coefficient of the target indoor unit is determined; The energy consumption coefficient of the multi-split air conditioning system is determined based on the total actual energy consumption of all indoor units in operation and the total operating time of all indoor units in operation.
4. The multi-split air conditioning system according to claim 1, characterized in that, The determination of the energy consumption test result of the target indoor unit based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system includes: When the ratio of the energy consumption coefficient of the target indoor unit to the energy consumption coefficient of the multi-split air conditioning system reaches a preset threshold, the energy consumption detection result of the target indoor unit is determined to characterize the abnormal energy consumption of the target indoor unit.
5. The multi-split air conditioning system according to claim 1, characterized in that, The outdoor unit includes Outdoor heat exchanger; The indoor unit includes: The indoor unit casing is equipped with a return air vent and an air outlet. An indoor heat exchanger is installed inside the indoor unit casing; An electronic expansion valve is installed between the indoor heat exchanger and the outdoor heat exchanger to regulate the flow rate of refrigerant liquid between the indoor heat exchanger and the outdoor heat exchanger. The first temperature sensor is installed at the return air vent to detect the indoor return air temperature; A second temperature sensor is installed at the air outlet to detect the indoor air temperature. The actual energy consumption of each indoor unit in operation is determined based on the energy consumption parameters of each indoor unit in operation. These energy consumption parameters include: the current opening and total opening of the electronic expansion valve, the indoor return air temperature detected by the first temperature sensor, the indoor outlet air temperature detected by the second temperature sensor, the operating time of the indoor unit, the capacity of the indoor unit, and the operating mode of the indoor unit.
6. The multi-split air conditioning system according to any one of claims 1-5, characterized in that, The multi-split air conditioning system also includes: Multiple wired controllers, with one indoor unit corresponding to one wired controller; The controller is also configured to: The energy consumption detection results, the energy consumption coefficient of the target indoor unit, and the energy consumption coefficient of the multi-split air conditioning system are sent to the target indoor unit so that the wired controller corresponding to the target indoor unit can display the energy consumption detection results, the energy consumption coefficient of the target indoor unit, and the energy consumption coefficient of the multi-split air conditioning system.
7. A control method for a multi-split air conditioning system, characterized in that, The method includes: Obtain the actual energy consumption and operating time of each indoor unit in operation among the multiple indoor units of a multi-split air conditioning system; Based on the actual energy consumption and operating time of each indoor unit in operation, the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system are determined; the target indoor unit is any indoor unit among all indoor units in operation. Based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system, the energy consumption detection result of the target indoor unit is determined, and the energy consumption detection result is used to characterize whether the energy consumption of the target indoor unit is abnormal.
8. The method according to claim 7, characterized in that, The determination of the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system based on the actual energy consumption and operating time of each indoor unit in operation includes: Based on the actual energy consumption of each indoor unit in operation, determine the total actual energy consumption of all indoor units in operation. Based on the operating time of each indoor unit in operation, the predicted energy consumption of each indoor unit in operation is determined, and the total predicted energy consumption of all indoor units in operation is determined. Based on the actual energy consumption of the target indoor unit and the predicted energy consumption of the target indoor unit, the energy consumption coefficient of the target indoor unit is determined; The energy consumption coefficient of the multi-split air conditioning system is determined based on the total actual energy consumption of all indoor units in operation and the total predicted energy consumption of all indoor units in operation.
9. The method according to claim 8, characterized in that, The determination of the energy consumption test result of the target indoor unit based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system includes: When the ratio of the energy consumption coefficient of the target indoor unit to the energy consumption coefficient of the multi-split air conditioning system reaches a preset threshold, the energy consumption detection result of the target indoor unit is determined to characterize the abnormal energy consumption of the target indoor unit.
10. The method according to claim 7, characterized in that, The energy consumption coefficient of the target indoor unit includes the actual energy consumption of the target indoor unit and the operating time of the target indoor unit. The energy consumption coefficient of the multi-split air conditioning system includes the total actual energy consumption of all indoor units in operation and the total operating time of all indoor units in operation. The determination of the energy consumption test result of the target indoor unit based on the energy consumption coefficient of the target indoor unit and the energy consumption coefficient of the multi-split air conditioning system includes: Determine a first ratio between the actual energy consumption of the target indoor unit and the total actual energy consumption of all indoor units in operation; Determine a second ratio between the runtime of the target indoor unit and the total runtime of all indoor units in operation; The energy consumption test result of the target indoor unit is determined based on the first ratio and the second ratio.