Intelligent control system and method for multi-connected air conditioning unit

Abstract

The present invention discloses an intelligent control system and method for a multi-split air-conditioning unit, belonging to the technical field of multi-split air-conditioning, comprising: a data acquisition unit, used for real-time monitoring of a communication bus of the multi-split air-conditioning unit to automatically acquire data of an indoor unit and an outdoor unit; an outdoor ambient temperature acquisition unit: used for acquiring outdoor ambient temperature data through communication with an outdoor unit; a control unit, used for analyzing data of the data acquisition unit and the outdoor ambient temperature acquisition unit, and generating instructions for controlling the operation of the air-conditioning; the present invention reasonably distributes the refrigerant flow according to the load demand of each indoor unit, ensures that the temperature of each room is uniform and meets personalized needs, improves the operating efficiency of the indoor unit by detecting the noise decibel value and light perception value, thereby reducing the workload of the outdoor unit, and effectively improves the utilization rate of energy and reduces the energy consumption of the overall unit by coordinating the optimized control of the indoor unit with the optimized control of the outdoor unit.

Description

Technical Field

[0001] The present invention belongs to the technical field of multi-split air conditioners, and in particular relates to an intelligent control system and method for a multi-split air conditioner unit. Background Art

[0002] A multi-split air conditioning unit is an air conditioning system consisting of an outdoor unit and several indoor units. In order to meet the cooling and heating load requirements of each room in a timely manner, the multi-split unit uses an electronic expansion valve to control the refrigerant flow supplied to each indoor unit coil, and changes the refrigerant circulation volume of the system by controlling the compressor.

[0003] The multi-split air conditioning unit adopts a one-to-many layout, generally with one outdoor unit, which takes up less space. In addition, there are only refrigerant pipes and condensate pipes to be connected, which are flexible to arrange and easy to construct, can reduce the building height, and reduce the construction cost; each room can be independently controlled, and personalized adjustments can be made according to the needs of different areas, providing more precise temperature control.

[0004] As more and more energy-saving and consumption-reducing equipment is being used, multi-split air-conditioning units automatically adjust the speed of the compressor according to changes in system load, change the refrigerant flow rate, and ensure that the unit operates at a higher efficiency. By reducing energy consumption during load operation, the annual operating cost is lower;

[0005] Existing multi-split air-conditioning units often use fixed frequency or simple intermittent operation mode when controlling the operation of the compressor, which makes it difficult to accurately match the actual load demand, resulting in energy waste, large indoor temperature fluctuations and other problems. In particular, the outdoor unit has low working efficiency, resulting in increased costs and inability to achieve precise control. Therefore, it is necessary to develop a new intelligent control system and method for multi-split air-conditioning units to solve the existing problems. Summary of the invention

[0006] The object of the present invention is to provide an intelligent control system and method for a multi-split air-conditioning unit, so as to solve the problem that the multi-split air-conditioning unit cannot operate with high efficiency.

[0007] To achieve the above object, the present invention provides the following technical solution: an intelligent control system for a multi-connected air-conditioning unit, comprising:

[0008] Data acquisition unit, used to monitor the communication bus of multi-split air conditioner units in real time and automatically collect data from indoor and outdoor units;

[0009] An outdoor environment temperature collection unit is used to collect outdoor environment temperature data by communicating with an outdoor unit;

[0010] A control unit, used for analyzing the data from the data acquisition unit and the outdoor ambient temperature acquisition unit, and generating instructions for controlling the operation of the air conditioner;

[0011] Equipment file management unit, used to manage equipment file information of air-conditioning units;

[0012] A data storage unit for storing air conditioning unit data, air conditioning control unit parameters and event records;

[0013] A data query unit, used to provide data query services;

[0014] The parameter setting and query unit is used to set and query the uplink and downlink communication parameters of the air-conditioning unit, control clock synchronization and equipment reset.

[0015] Preferably, the real-time monitoring of the communication bus of the multi-split air-conditioning unit automatically collects data of the indoor unit and the outdoor unit including: the on / off status of the indoor unit, the set temperature of the indoor unit, the working mode of the indoor unit, the setting of the indoor unit wind speed, the return air temperature of the indoor unit, the current fault code of the indoor unit, the return air humidity of the indoor unit, the rated power of the outdoor unit, the current working frequency of the outdoor unit compressor and the current fault code of the outdoor unit, the noise decibel value of the indoor unit room, and the light intensity value of the indoor unit room.

[0016] Preferably, the control unit also receives instructions issued by the smart energy unit or the master station; the instructions include: control mode and control instructions;

[0017] The control methods include: shutting down and setting the air conditioning temperature;

[0018] The control instruction includes: a control period parameter. When the air conditioning control unit receives a control release instruction or the control period ends, the unit operating parameters are restored according to the control parameters.

[0019] Preferably, the content of the air conditioner unit equipment report includes: air conditioner brand, number of outdoor units and indoor units, communication addresses of outdoor units and indoor units, communication status of outdoor units and indoor units, current fault code and report generation date and time;

[0020] If the equipment report of the connected air conditioning unit needs to be updated, the following conditions should be met: If the communication of any indoor unit fails, the connection status of the indoor unit is set to lost connection and the report is updated;

[0021] The new outdoor unit address is identified in the air conditioning unit communication and the report is updated;

[0022] If a fault code appears in the indoor or outdoor unit, update the report.

[0023] Preferably, the data storage unit includes: a data storage module for storing current operating parameters and status data of each outdoor unit and indoor unit of all connected multi-connected air-conditioning units; and operating parameters of each indoor unit of the air-conditioning unit before control and equipment report data of the air-conditioning unit;

[0024] A parameter storage module, used to store uplink and downlink communication parameters and air conditioning unit control parameters;

[0025] The event record storage module is used to store air-conditioning operation parameter control event records and user interface air-conditioning control event records.

[0026] Preferably, the equipment file management unit includes:

[0027] The bus monitoring and device retrieval module is used to monitor the signal on the air-conditioning unit communication bus and retrieve the air-conditioning unit devices on the bus, and identify the communication addresses of the outdoor unit and the indoor unit;

[0028] The air conditioning unit equipment report module is used to generate air conditioning unit equipment reports for connected air conditioning units.

[0029] Preferably, the parameter setting and query unit includes: a clock call and time calibration module; used for receiving clock call and time calibration commands;

[0030] The device reset and initialization module is used for hardware reset instructions to restart the device.

[0031] The present invention further provides a control method for an intelligent control system of a multi-connected air-conditioning unit, which is characterized by comprising: acquiring data collected by a data collection unit and an outdoor ambient temperature collection unit, and when the working state of the indoor unit changes, acquiring corresponding sensor data according to the type of state change; otherwise, acquiring set sensor data within a set time period;

[0032] Obtain the archive information of the equipment archive management unit and the data storage unit and the current operation data of the air-conditioning unit;

[0033] Analyze the collected data and current operation data, match the operation mode after obtaining the control data, and generate instructions;

[0034] Preferably, the operation mode includes: an outdoor unit operation mode and an indoor unit operation mode;

[0035] The outdoor unit operation modes include: rated mode, economic mode and energy-saving mode;

[0036] In rated mode, the operating power is rated power;

[0037] In economic mode, the operating power is 30% of the rated power;

[0038] In energy-saving mode, the operating power is 50% of the rated power;

[0039] The indoor unit operation modes include strong mode and sleep mode;

[0040] In strong mode, the expansion valve opening is 20% of the standard opening, and the wind speed is the highest speed;

[0041] In sleep mode, the expansion valve opening is 1 / 10 of the aperture and the wind speed is the lowest.

[0042] Preferably, the step of analyzing the collected data and the current operating data to obtain the control data and then matching the operating mode comprises:

[0043] When the outdoor temperature acquired by the outdoor environment temperature acquisition unit between 7 o'clock and 8 o'clock is less than 10 degrees or greater than 25 degrees, the operation mode of the outdoor unit is the rated mode;

[0044] When the outdoor temperature acquired by the outdoor environment temperature acquisition unit between 7 o'clock and 8 o'clock is between 10 degrees and 20 degrees, the operation mode of the outdoor unit is the economic mode;

[0045] If the number of indoor units is more than 2, and the average set temperature of all indoor units is higher than 26 degrees or lower than 20 degrees, the outdoor unit will operate in rated mode;

[0046] If the number of indoor units in operation exceeds 60% of the total number of indoor units, the operation mode of the outdoor unit switches to the rated mode;

[0047] If the number of indoor units turned on is less than 20% of the total number of indoor units, the operation mode of the outdoor unit is switched to the economic mode;

[0048] If the number of indoor units turned on is less than 50% of the total number of indoor units, the operation mode of the outdoor unit is switched to energy-saving mode;

[0049] When the current temperature of the indoor unit is less than 30% of the average current temperature of all indoor units or the current temperature is greater than 30% of the average value, and the state of the indoor unit actively adjusts the temperature value, the operation mode of the indoor unit is switched to the strong mode until the current temperature of the indoor unit reaches the set temperature, then the strong mode is exited;

[0050] When the indoor unit detects that the noise decibel value of the current indoor unit room is less than 30 decibels between 22:00 and 8:00, and the current light intensity is 1 / 2 of the previous light intensity, the operation mode of the current indoor unit is the sleep mode.

[0051] The technical effects and advantages of the present invention are as follows: the intelligent control system and method of the multi-split air-conditioning unit collects indoor temperature, humidity, personnel flow and other parameters in real time through sensors installed on the indoor unit and the outdoor unit, and comprehensively judges the current and future load demands in combination with historical data; the coordinated work of multiple indoor and outdoor units is realized through a centralized control system, and the refrigerant flow is reasonably allocated according to the load demand of each indoor unit to ensure that the temperature of each room is uniform and meets personalized needs; the operating efficiency of the indoor unit can be improved by detecting the noise decibel value and light perception value, thereby reducing the workload of the outdoor unit; and the optimized control of the indoor unit is coordinated with the optimized control of the outdoor unit to effectively improve the energy utilization rate and reduce the energy consumption of the overall unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 It is a system framework diagram of the present invention;

[0053] Figure 2 Schematic diagram of the layout of the outdoor unit and the indoor unit of an embodiment of the present invention;

[0054] Figure 3 It is a schematic diagram of the process of the present invention. DETAILED DESCRIPTION

[0055] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0056] The present invention provides Figure 1 , Figure 2 A multi-connected air conditioning unit intelligent control system as shown in the figure comprises:

[0057] The data acquisition unit is used to monitor the communication bus of the multi-split air-conditioning unit in real time and automatically collect the data of the indoor unit and the outdoor unit; the data includes: the on / off status of the indoor unit; the set temperature of the indoor unit; the working mode of the indoor unit; the wind speed setting of the indoor unit; the return air temperature of the indoor unit; the current fault code of the indoor unit. The return air humidity of the indoor unit; the rated power of the outdoor unit; the current working frequency of the outdoor unit compressor; the current fault code of the outdoor unit, the noise decibel value of the indoor unit room, and the light intensity value of the indoor unit room; through the sensors installed in the indoor unit and the outdoor unit, the indoor temperature, humidity, personnel flow and other parameters are collected in real time, and the current and future load requirements are comprehensively judged in combination with historical data.

[0058] An outdoor environment temperature collection unit is used to collect outdoor environment temperature data by communicating with an outdoor unit;

[0059] A control unit is used to support the air conditioning operation parameter control instructions issued by the smart energy unit or the master station; the instructions include: control methods including shutdown, air conditioning temperature setting, etc.;

[0060] The control command includes optional control period parameters. When the air conditioning control unit receives the control release command or the control period ends, the unit operating parameters can be restored according to the control parameter requirements;

[0061] Equipped with anti-false operation measures, for indoor units that are not turned on or the air-conditioning temperature setting value meets the limit requirements, control should be carried out to avoid causing the indoor unit to be turned on or the air-conditioning temperature setting value to reach the limit.

[0062] The equipment file management unit is used to manage the equipment file information of the air-conditioning unit, including:

[0063] The bus monitoring and device retrieval module is used to monitor the signals on the air-conditioning unit communication bus, retrieve the air-conditioning unit devices on the bus, and identify the communication addresses of the outdoor unit and the indoor unit.

[0064] The air conditioning unit equipment report module is used to generate an air conditioning unit equipment report for each connected air conditioning unit. The content of the equipment report includes the following information: the number of outdoor units and indoor units; the communication address of the outdoor units and indoor units; the communication status and current fault code of the outdoor units and indoor units; and the date and time when the report was generated.

[0065] If the equipment report of the connected air conditioning unit needs to be updated, the following conditions must be met:

[0066] If any indoor unit fails to communicate, the connection status of the indoor unit will be set to lost and the report will be updated;

[0067] The new outdoor unit address is identified in the air conditioning unit communication and the report is updated;

[0068] If a fault code appears in the indoor or outdoor unit, update the report.

[0069] The data storage unit is used to store air conditioning unit data, air conditioning control unit parameters, event records, etc. The requirements are as follows:

[0070] Data storage module:

[0071] 1) Can store the current operating parameters and status data of all outdoor and indoor units of all connected multi-connected air-conditioning units;

[0072] 2) It can store the operating parameters of each indoor unit of the air-conditioning unit before control for parameter recovery;

[0073] 3) Can store air conditioning unit equipment report data.

[0074] Parameter storage module:

[0075] 1) Can store uplink and downlink communication parameters;

[0076] 2) Energy storage air conditioning unit control parameters;

[0077] 3) The stored parameters will not be lost after power failure.

[0078] Event record storage module:

[0079] 1) Can store air conditioning operation parameter control event records;

[0080] 2) Can store user interface air conditioning control event records;

[0081] 3) The number of records that can be stored for each event is no less than 100, and will not be lost after power failure.

[0082] The data query unit is used to provide data query services, including the following data:

[0083] a) Data of indoor and outdoor units of air conditioner units;

[0084] b) Air conditioning unit equipment report;

[0085] c) Event records, including air conditioning operation parameter control event records and user interface air conditioning control event records.

[0086] Parameter setting and query unit, used to set and query the uplink and downlink communication parameters and control words of the air-conditioning unit, and should be able to support clock synchronization and equipment reset;

[0087] The clock call and time calibration module is used to receive the clock call and time calibration commands. The time calibration error should not exceed 10s. Under reference conditions, the daily timing error of the air conditioning control unit clock should be ≤±1s / d.

[0088] The device reset and initialization module is used for hardware reset instructions and restart. It should be able to support event initialization instructions and clear all event record data.

[0089] The communication interface module communicates with the integrated communication IoT module uplink to support remote control of the master station, and is connected in parallel with the status monitoring module to support local control by the user; the communication interface module is connected to the control unit of the air-conditioning unit downlink;

[0090] The communication interface module supports at least RS485 interface and Modbus-RTU or MACnet MS / TP protocol for uplink communication, and can support third-party wireless module access (ZigBee, BLE, WIFI) and TCP / UDP protocol;

[0091] The communication interface module supports at least RS485 interface or RS232 interface for downlink communication;

[0092] The communication interface module can correspond one-to-one with the host of the air-conditioning unit; for modular air-cooled heat pump units, it should correspond to a cluster consisting of several air-cooled heat pump air-conditioning units in the same cycle;

[0093] The communication interface module can receive instructions from the upper computer, i.e. the remote host, and convert them into commands that can be recognized by the operation control module of the central air-conditioning unit, so as to realize remote monitoring of the chiller (heat pump) unit; monitor and change the set temperature of the circulating water inlet and outlet, the data collection and update cycle of the set temperature value and the current temperature value of the circulating water should be less than 1 minute, and the response time of changing the set temperature value of the circulating water should be less than 1 minute; monitor and change the current working current ratio of the host compressor, monitor the refrigerant pressure of the host condenser and evaporator, monitor and switch the power on and off status and operation mode, and monitor unit operation failures. Example

[0094] The present invention further provides Figure 3 A control method of a multi-connected air conditioning unit intelligent control system shown includes the following steps:

[0095] Step 1: Acquire the collected data of the data acquisition unit and the outdoor ambient temperature acquisition unit. When the working state of the indoor unit changes, acquire the corresponding sensor data according to the type of state change; otherwise, acquire the set sensor data within a set time period;

[0096] Step 2: Obtain the archive information of the equipment archive management unit and the data storage unit and the current operation data of the air-conditioning unit;

[0097] Step 3: Analyze the collected data and the current operation data, match the operation mode after obtaining the control data, and generate control instructions;

[0098] The operation modes include: an outdoor unit operation mode and an indoor unit operation mode;

[0099] The outdoor unit operation modes include: rated mode, economic mode and energy-saving mode;

[0100] In rated mode, the operating power is rated power;

[0101] In economic mode, the operating power is 30% of the rated power;

[0102] In energy-saving mode, the operating power is 50% of the rated power;

[0103] The indoor unit operation modes include strong mode and sleep mode;

[0104] In strong mode, the expansion valve opening is 20% of the standard opening, and the wind speed is the highest speed;

[0105] In sleep mode, the expansion valve is opened to 1 / 10 of the aperture and the wind speed is at the lowest speed. The frequency converter is used to intelligently adjust the compressor speed according to the load demand sensing result. When the load demand increases, the compressor speed is increased to increase the cooling capacity; when the load demand decreases, the compressor speed is reduced to reduce the waste of cooling capacity.

[0106] The analysis of the collected data and the current operation data to obtain the control data and then match the operation mode includes:

[0107] When the outdoor temperature acquired by the outdoor environment temperature acquisition unit between 7 o'clock and 8 o'clock is less than 10 degrees or greater than 25 degrees, the operation mode of the outdoor unit is the rated mode;

[0108] When the outdoor temperature acquired by the outdoor environment temperature acquisition unit between 7 o'clock and 8 o'clock is between 10 degrees and 20 degrees, the operation mode of the outdoor unit is the economic mode;

[0109] If the number of indoor units is more than 2, and the average set temperature of all indoor units is higher than 26 degrees or lower than 20 degrees, the outdoor unit will operate in rated mode;

[0110] If the number of indoor units in operation exceeds 60% of the total number of indoor units, the operation mode of the outdoor unit switches to the rated mode;

[0111] If the number of indoor units turned on is less than 20% of the total number of indoor units, the operation mode of the outdoor unit is switched to the economic mode;

[0112] If the number of indoor units turned on is less than 50% of the total number of indoor units, the operation mode of the outdoor unit is switched to energy-saving mode;

[0113] When the current temperature of the indoor unit is less than 30% of the average current temperature of all indoor units, or the current temperature is greater than 30% of the average value, and the state of the indoor unit actively adjusts the temperature value, the operation mode of the indoor unit is the strong mode, and the strong mode is exited when the current temperature of the indoor unit reaches the set temperature;

[0114] When the indoor unit detects that the noise decibel value of the current indoor unit room is less than 30 decibels between 22:00 and 8:00, and the current light intensity is 1 / 2 of the previous light intensity, the current operation mode of the indoor unit is the sleep mode. The coordinated operation of multiple indoor units and outdoor units is achieved through a centralized control system. According to the load requirements of each indoor unit, the refrigerant flow rate is reasonably allocated to ensure that the temperature of each room is uniform and meets personalized needs. The detected noise decibel value and light intensity can be used to achieve the operating efficiency of the indoor unit, thereby reducing the workload of the outdoor unit. By coordinating the optimized control of the indoor unit with the optimized control of the outdoor unit, the energy utilization rate is effectively improved and the energy consumption of the overall unit is reduced.

[0115] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An intelligent control system for a multi-connected air-conditioning unit, characterized in that: include: Data acquisition unit, used to monitor the communication bus of multi-split air conditioner units in real time and automatically collect data from indoor and outdoor units; An outdoor environment temperature collection unit is used to collect outdoor environment temperature data by communicating with an outdoor unit; A control unit, used for analyzing the data from the data acquisition unit and the outdoor ambient temperature acquisition unit, and generating instructions for controlling the operation of the air conditioning unit; Equipment file management unit, used to manage equipment file information of air-conditioning units; A data storage unit for storing air conditioning unit data, air conditioning control unit parameters and event records; A data query unit, used to provide data query services; Parameter setting and query unit, used to set and query the uplink and downlink communication parameters of the air-conditioning unit, control clock synchronization and equipment reset; The equipment file management unit comprises: The bus monitoring and device retrieval module is used to monitor the signal on the air-conditioning unit communication bus, retrieve the air-conditioning unit devices on the bus, and identify the communication addresses of the outdoor unit and the indoor unit; The air conditioner unit equipment report module is used to generate an air conditioner unit equipment report for the connected air conditioner units; The air conditioner unit equipment report includes: air conditioner brand, number of outdoor units and indoor units, communication addresses of outdoor units and indoor units, communication status of outdoor units and indoor units, current fault code and date and time of report generation; If the equipment report of the connected air conditioning unit needs to be updated, the following conditions must be met: If any indoor unit fails to communicate, the connection status of the indoor unit will be set to lost and the report will be updated; The new outdoor unit address is identified in the air conditioning unit communication and the report is updated; If a fault code appears in the indoor or outdoor unit, update the report.

2. The intelligent control system of a multi-connected air conditioning unit according to claim 1, characterized in that: The real-time monitoring of the multi-split air-conditioning unit communication bus automatically collects data of the indoor unit and the outdoor unit, including: the indoor unit on / off status, the indoor unit set temperature, the indoor unit working mode, the indoor unit wind speed setting, the indoor unit return air temperature, the indoor unit current fault code, the indoor unit return air humidity, the outdoor unit rated power, the outdoor unit compressor current working frequency, the outdoor unit current fault code, the noise decibel value and light intensity of the indoor unit room.

3. The intelligent control system of a multi-connected air conditioning unit according to claim 1, characterized in that: The control unit also receives instructions issued by the smart energy unit or the master station; The instructions include control methods and control instructions; The control methods include: shutting down and setting the air conditioning temperature; The control instruction includes: a control period parameter. When the air conditioning control unit receives a control release instruction or the control period ends, the unit operating parameters are restored according to the control parameters.

4. The intelligent control system of a multi-connected air conditioning unit according to claim 1, characterized in that: The data storage unit comprises: The data storage module is used to store the current operating parameters and status data of each outdoor unit and indoor unit of all connected multi-connected air-conditioning units, as well as the operating parameters of each indoor unit before control and the equipment report data of the air-conditioning unit; A parameter storage module, used to store uplink and downlink communication parameters and control parameters of the air-conditioning unit; The event record storage module is used to store the control event records of the air conditioner operating parameters and the air conditioner control event records of the user interface.

5. The intelligent control system of a multi-connected air conditioning unit according to claim 1, characterized in that: The parameter setting and query unit includes: The clock call and time calibration module is used to receive clock call and time calibration commands; The device reset and initialization module is used for hardware reset instructions to restart the device.

6. The control method of the intelligent control system of a multi-split air-conditioning unit according to any one of claims 1 to 5, characterized in that: The following steps are involved: Acquire the collected data of the data collection unit and the outdoor environment temperature collection unit, and when the working state of the indoor unit changes, acquire the corresponding sensor data according to the type of state change; Otherwise, the set sensor data is obtained within the set time period; Obtain the archive information of the equipment archive management unit and the data storage unit and the current operation data of the air-conditioning unit; Analyze the collected data and current operating data, match the operating mode after obtaining the control data, and generate instructions.

7. The method according to claim 6, characterized in that: The operation modes include: an outdoor unit operation mode and an indoor unit operation mode; The outdoor unit operation modes include: rated mode, economic mode and energy-saving mode; In rated mode, the operating power is rated power; In economic mode, the operating power is 30% of the rated power; In energy-saving mode, the operating power is 50% of the rated power; The indoor unit operation modes include strong mode and sleep mode; In strong mode, the expansion valve opening is 20% of the standard opening, and the wind speed is the highest speed; In sleep mode, the expansion valve opening is 1 / 10 of the aperture and the wind speed is the lowest.

8. The method according to claim 7, characterized in that: The method of analyzing the collected data and the current operation data to obtain the control data and then matching the operation mode includes the following steps: When the outdoor temperature acquired by the outdoor environment temperature acquisition unit between 7 o'clock and 8 o'clock is less than 10 degrees or greater than 25 degrees, the operation mode of the outdoor unit is the rated mode; When the outdoor temperature acquired by the outdoor environment temperature acquisition unit between 7 o'clock and 8 o'clock is between 10 degrees and 20 degrees, the operation mode of the outdoor unit is the economic mode; If the number of indoor units is more than 2, and the average set temperature of all indoor units is higher than 26 degrees or lower than 20 degrees, the outdoor unit will operate in rated mode; If the number of indoor units in operation exceeds 60% of the total number of indoor units, the operation mode of the outdoor unit switches to the rated mode; If the number of indoor units turned on is less than 20% of the total number of indoor units, the operation mode of the outdoor unit will switch to the economic mode; If the number of indoor units turned on is less than 50% of the total number of indoor units, the operation mode of the outdoor unit is switched to energy-saving mode; When the current temperature of the indoor unit is less than 30% of the average current temperature of all indoor units, or the current temperature is greater than 30% of the average value, and the state of the indoor unit actively adjusts the temperature value, the operation mode of the indoor unit is switched to the strong mode until the current temperature of the indoor unit reaches the set temperature and then exits the strong mode; When the indoor unit detects that the noise decibel value of the current indoor unit room is less than 30 decibels between 22:00 and 8:00, and the current light intensity is 1 / 2 of the previous light intensity, the operation mode of the current indoor unit is the sleep mode.

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