Control Method and Related Products of Multi-Split Air Conditioning System

Abstract

The present application provides a control method and related products for a multi-connected air conditioning system. When the heating operation or defrosting ends for the first preset duration, the heat exchanger temperature of each parallel unit is obtained, and the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature is obtained. Among them, the maximum heat exchanger temperature is the maximum temperature that lasts for the second preset duration among all the heat exchanger temperatures, and the minimum heat exchanger temperature is the minimum temperature that lasts for the second preset duration among all the heat exchanger temperatures. According to the temperature difference, the current target flow deviation level of the multi-connected air conditioning system is determined, and a flow deviation correction program matching the target flow deviation level is executed. The present disclosure can ensure that when the parallel air conditioning system is in the heating mode, after refrigerant flow deviation is caused by various factors, the system performs refrigerant flow deviation correction control, ensuring that the frosting time and frosting degree of the heat exchangers of each module of the parallel system are consistent to the greatest extent, and ensuring the best reliability and comfort of the air conditioning system.

Description

Technical Field

[0001] The present application belongs to the field of air conditioning manufacturing technology, and specifically relates to a control method for a multi-split air conditioning system and related products. Background Art

[0002] In the related art, due to the limited installation space in actual projects, it is possible that a single module in the multi-split air conditioner is not installed in an ideal position, resulting in poor heat dissipation, which may reduce the heat exchange capacity of the heat exchanger of this module and aggravate the refrigerant deviation. In the heating mode, the deviation between the modules of the parallel unit can easily cause the outdoor unit heat exchanger of a module to frost first, or frost the fastest, or frost the most severely, thereby extending the defrost cycle of the system and affecting the reliability, energy consumption and comfort of the system. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, one purpose of the present application is to propose a control method for a multi-split air-conditioning system, by obtaining the heat exchanger temperature of each parallel unit when the heating operation or defrosting ends for a first preset time; obtaining the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature, wherein the maximum heat exchanger temperature is the maximum temperature of all heat exchanger temperatures that lasts for a second preset time, and the minimum heat exchanger temperature is the minimum temperature of all heat exchanger temperatures that lasts for a second preset time; determining the current target bias level of the multi-split air-conditioning system according to the temperature difference, and executing a bias correction program that matches the target bias level. The present disclosure can ensure that when the parallel air-conditioning system is in the heating mode, after various factors cause the refrigerant to drift, the system performs refrigerant drift correction control, and ensures that the frosting time and degree of the heat exchangers of each module in the parallel system are consistent to the greatest extent, thereby ensuring the best reliability and comfort of the air-conditioning system.

[0005] The second objective of the present application is to provide a control device for a multi-split air conditioning system.

[0006] The third objective of the present application is to provide an electronic device.

[0007] A fourth objective of the present application is to provide a computer-readable storage medium.

[0008] A fifth object of the present application is to provide a computer program product.

[0009] The sixth objective of the present application is to provide a multi-split air conditioning system.

[0010] To achieve the above object, a control method for a multi-connected air-conditioning system according to a first aspect of the present application includes: when the heating operation or defrosting ends for a first preset duration, obtaining the heat exchanger temperature of each parallel unit; obtaining the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature, where the maximum heat exchanger temperature is the maximum temperature that lasts for a second preset duration among all the heat exchanger temperatures, and the minimum heat exchanger temperature is the minimum temperature that lasts for a second preset duration among all the heat exchanger temperatures; determining the current target flow deviation level of the multi-connected air-conditioning system according to the temperature difference, and executing a flow deviation correction program matching the target flow deviation level.

[0011] The present application can ensure that when the parallel air-conditioning system is in the heating mode, after refrigerant flow deviation is caused by various factors, the system performs refrigerant flow deviation correction control, ensuring that the frosting time and frosting degree of the heat exchangers of each module of the parallel system are consistent to the greatest extent, and ensuring the best reliability and comfort of the air-conditioning system.

[0012] According to an embodiment of the present application, the executing the flow deviation correction program matching the target flow deviation level includes: controlling the fan speed of the first parallel unit corresponding to the minimum heat exchanger temperature to increase.

[0013] According to an embodiment of the present application, the executing the flow deviation correction program matching the target flow deviation level further includes: in response to the fan speed increasing to the maximum speed and the temperature difference still being within the temperature range corresponding to the target flow deviation level, correcting the first target superheat degree of the first electronic expansion valve of the first parallel unit, and adjusting the opening degree of the first electronic expansion valve based on the first target superheat degree; correcting the second target superheat degree of the second electronic expansion valve of the second parallel unit corresponding to the maximum heat exchanger temperature, and adjusting the opening degree of the second electronic expansion valve based on the second target superheat degree.

[0014] According to an embodiment of the present application, the executing the flow deviation correction program matching the target flow deviation level further includes: in response to the temperature difference no longer being within the temperature range corresponding to the target flow deviation level, or in response to the temperature difference still being within the temperature range corresponding to the target flow deviation level, and the first target superheat degree being corrected to the maximum allowable superheat degree and the second target superheat degree being corrected to the minimum allowable superheat degree, stopping further correcting the first target superheat degree and the second target superheat degree.

[0015] According to an embodiment of the present application, the executing the flow deviation correction program matching the target flow deviation level further includes: in response to the temperature difference still being within the temperature range corresponding to the target flow deviation level, and the first target superheat degree being corrected to the maximum allowable superheat degree and the second target superheat degree being corrected to the minimum allowable superheat degree, reducing the compressor frequency of the first parallel unit at a set time interval.

[0016] According to an embodiment of the present application, the execution of the bias current correction program matching the target bias current level further includes: stopping further reducing the frequency of the compressor in response to the temperature difference no longer being within the temperature range corresponding to the target bias current level; or, sending an alarm message in response to the frequency of the compressor being reduced to the minimum allowable frequency.

[0017] According to an embodiment of the present application, the control method of the multi-connected air-conditioning system further includes: determining that the target bias current level is the first bias current level in response to the temperature difference being greater than or equal to the first preset temperature value and less than the second preset temperature value; determining that the target bias current level is the second bias current level in response to the temperature difference being greater than or equal to the second preset temperature value; and determining that the multi-connected air-conditioning system has no bias current in response to the temperature difference being less than the first preset temperature value.

[0018] According to an embodiment of the present application, the control method of the multi-connected air-conditioning system further includes: obtaining the critical frosting temperature of the heat exchanger in response to the temperature difference being greater than or equal to the first preset temperature value and less than the second preset temperature value; and determining that the target bias current level is the second bias current level in response to the critical frosting temperature being greater than or equal to the minimum heat exchanger temperature and less than the maximum heat exchanger temperature.

[0019] To achieve the above object, an embodiment of the second aspect of the present application provides a control device for a multi-connected air-conditioning system, including: a temperature acquisition module, configured to acquire the heat exchanger temperature of each parallel unit when the heating operation or defrosting ends for a first preset duration; a temperature difference acquisition module, configured to acquire the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature, where the maximum heat exchanger temperature is the maximum temperature that lasts for a second preset duration among all the heat exchanger temperatures, and the minimum heat exchanger temperature is the minimum temperature that lasts for a second preset duration among all the heat exchanger temperatures; and a bias current correction module, configured to determine the current target bias current level of the multi-connected air-conditioning system according to the temperature difference and execute a bias current correction program matching the target bias current level.

[0020] According to an embodiment of the present application, the bias current correction module is further configured to: increase the fan gear of the first parallel unit corresponding to the minimum heat exchanger temperature.

[0021] According to an embodiment of the present application, the bias current correction module is further configured to: in response to the fan gear rising to the maximum gear and the temperature difference still being within the temperature range corresponding to the target bias current level, correct the first target superheat degree of the first electronic expansion valve of the first parallel unit, and adjust the opening degree of the first electronic expansion valve based on the first target superheat degree; correct the second target superheat degree of the second electronic expansion valve of the second parallel unit corresponding to the maximum heat exchanger temperature, and adjust the opening degree of the second electronic expansion valve based on the second target superheat degree.

[0022] According to an embodiment of the present application, the bias current correction module is further configured to: in response to the temperature difference no longer being within the temperature range corresponding to the target bias current level, or in response to the temperature difference still being within the temperature range corresponding to the target bias current level, and the first target superheat degree being corrected to the maximum allowable superheat degree and the second target superheat degree being corrected to the minimum allowable superheat degree, stop further correcting the first target superheat degree and the second target superheat degree.

[0023] According to an embodiment of the present application, the bias current correction module is further configured to: in response to the temperature difference still being within the temperature range corresponding to the target bias current level, and the first target superheat degree being corrected to the maximum allowable superheat degree and the second target superheat degree being corrected to the minimum allowable superheat degree, reduce the compressor frequency of the first parallel unit at a set time interval.

[0024] According to an embodiment of the present application, the bias current correction module is further configured to: in response to the temperature difference no longer being within the temperature range corresponding to the target bias current level, stop further reducing the frequency of the compressor; or in response to the frequency of the compressor being reduced to the minimum allowable frequency, send an alarm message.

[0025] According to an embodiment of the present application, the control device of the multi-connected air conditioner system is further configured to: in response to the temperature difference being greater than or equal to a first preset temperature value and less than a second preset temperature value, determine that the target bias current level is the first bias current level; in response to the temperature difference being greater than or equal to the second preset temperature value, determine that the target bias current level is the second bias current level; in response to the temperature difference being less than the first preset temperature value, determine that the multi-connected air conditioner system has no bias current.

[0026] According to an embodiment of the present application, the control device of the multi-connected air conditioner system is further configured to: in response to the temperature difference being greater than or equal to a first preset temperature value and less than a second preset temperature value, obtain the critical frosting temperature of the heat exchanger; in response to the critical frosting temperature being greater than or equal to the minimum heat exchanger temperature and less than the maximum heat exchanger temperature, determine that the target bias current level is the second bias current level.

[0027] To achieve the above object, a third aspect embodiment of the present application provides an electronic device, including: a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, it implements the control method of the multi-connected air-conditioning system as described in the first aspect embodiment of the present application.

[0028] To achieve the above object, a fourth aspect embodiment of the present application provides a computer-readable storage medium, on which a computer program is stored. When the program is executed by a processor, it implements the control method of the multi-connected air-conditioning system as described in the first aspect embodiment of the present application.

[0029] To achieve the above object, a fifth aspect embodiment of the present application provides a computer program product, including a computer program. When the computer program is executed by a processor, it implements the control method of the multi-connected air-conditioning system as described in the first aspect embodiment of the present application.

[0030] To achieve the above object, a sixth aspect embodiment of the present application provides a multi-connected air-conditioning system, including the above-mentioned electronic device, and / or the above-mentioned storage medium, and / or the control device of the above-mentioned multi-connected air-conditioning system, so as to implement the control method of the multi-connected air-conditioning system as described in the first aspect embodiment of the present application. Description of the Drawings

[0031] Figure 1 is a structural diagram of a multi-connected air-conditioning system shown according to the present application;

[0032] Figure 2 is a schematic diagram of a control method of a multi-connected air-conditioning system shown according to the present application;

[0033] Figure 3 is a schematic diagram of another control method of a multi-connected air-conditioning system shown according to the present application;

[0034] Figure 4 is a schematic diagram of another control method of a multi-connected air-conditioning system shown according to the present application;

[0035] Figure 5 is a schematic diagram of another control method of a multi-connected air-conditioning system shown according to the present application;

[0036] Figure 6 is a schematic diagram of another control method of a multi-connected air-conditioning system shown according to the present application;

[0037] Figure 7 is a schematic diagram of another control method of a multi-connected air-conditioning system shown according to the present application;

[0038] Figure 8It is a schematic diagram of a control device for a multi-connected air-conditioning system shown according to the present application;

[0039] Figure 9 It is a schematic diagram of an electronic device shown according to the present application. Specific embodiments

[0040] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be construed as a limitation to the present application.

[0041] The control method and device for a multi-connected air-conditioning system according to an embodiment of the present application will be described below with reference to the drawings.

[0042] Currently, there are more and more projects using multi-connected air conditioners. The capacity of a single unit is limited by the external dimensions and cannot be made particularly large. Therefore, multiple units are operated in parallel in many occasions to meet the requirements. Figure 1 It is a schematic diagram of a multi-connected air-conditioning system 100 according to an embodiment of the present application. As Figure 1 shown, taking two parallel units in a multi-connected air conditioner as an example, Unit A and Unit B are in parallel. Among them, in Unit A, a01 is a compressor, a02 is a four-way reversing valve, a03 is an outdoor heat exchanger assembly, a04 is a heat exchanger, a05 is an electronic expansion valve, a06 is a gas-liquid separator, a07 is a low-pressure sensor, and a08 is a heat exchanger outlet temperature sensor. Similar to Unit A, in Unit B, b01 is a compressor, b02 is a four-way reversing valve, b03 is an outdoor heat exchanger assembly, b04 is a heat exchanger, b05 is an electronic expansion valve, b06 is a gas-liquid separator, b07 is a low-pressure sensor, and b08 is a heat exchanger outlet temperature sensor.

[0043] Figure 2 It is a flowchart of a control method for a multi-connected air-conditioning system according to an embodiment of the present application. As Figure 2 shown, the control method for the multi-connected air-conditioning system includes the following steps:

[0044] S201, when the first preset duration ends after heating operation or defrosting, obtain the heat exchanger temperature of each parallel unit.

[0045] During the heating operation of a multi-connected air-conditioning system, a flow deviation phenomenon is likely to occur, which may cause frosting on the outdoor heat exchanger of a certain unit, affecting the reliability, energy consumption, and comfort of the system. Therefore, the multi-connected air-conditioning system can start timing when entering the heating mode or when defrosting ends. In response to the heating operation duration of the multi-connected air-conditioning system or the operation duration after defrosting ends reaching the first preset duration, the heat exchanger temperature of each parallel unit of the multi-connected air-conditioning system can be obtained and recorded. Optionally, the heat exchanger temperature of the parallel unit can be obtained by a temperature sensor installed at the outlet of the heat exchanger.

[0046] Optionally, the first preset duration can be 0, that is, the heat exchanger temperature of each parallel unit is detected and recorded in real time after the multi-connected air-conditioning system starts heating or defrosting ends. Among them, the detection can be continuous detection or periodic sampling detection.

[0047] Optionally, the first preset duration can be non-zero, and the first preset duration can be determined by the implementer. For example, the first preset duration can be set to 5 minutes, that is, when the multi-connected air-conditioning system has been heating or defrosting ends for 5 minutes, the heat exchanger temperature of each parallel unit of the multi-connected air-conditioning system is detected, and the detected temperature is recorded and saved. Among them, the detection can be continuous detection or periodic sampling detection.

[0048] Optionally, the heat exchanger temperatures of each parallel unit can be recorded as T1a, T1b, T1c, etc. according to each corresponding unit. T1a represents that after the first preset duration of the multi-connected air-conditioning system heating or defrosting ends, the real-time pipe temperature of heat exchanger a04 in unit A is T1a. Among them, the representative meanings of T1b and T1c are similar to that of T1a and will not be elaborated here.

[0049] S202, obtain the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature, where the maximum heat exchanger temperature is the maximum temperature that persists for the second preset duration among all heat exchanger temperatures, and the minimum heat exchanger temperature is the minimum temperature that persists for the second preset duration among all heat exchanger temperatures.

[0050] Among them, according to the heat exchanger temperatures of all parallel units obtained, the maximum heat exchanger temperature and the minimum heat exchanger temperature that last for the second preset time are determined. Among them, the second preset time refers to the preset duration for the heat exchanger to maintain the temperature. For example, if the second preset time is set to 2 minutes, the minimum value of the heat exchanger temperature that lasts for 2 minutes or more is judged as the minimum heat exchanger temperature, recorded as T1mix. If a certain temperature is the minimum temperature that can be measured, but its duration is less than 2 minutes, it is not considered to be the minimum heat exchanger temperature. Similarly, if the second preset time is set to 2 minutes, the maximum value of the heat exchanger temperature that lasts for 2 minutes or more is judged as the maximum heat exchanger temperature, recorded as T1max. If a certain temperature is the maximum temperature that can be measured, but its duration is less than 2 minutes, it is not considered to be the maximum heat exchanger temperature.

[0051] According to the obtained maximum heat exchanger temperature and minimum heat exchanger temperature, the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature is determined, which is recorded as ΔT. Among them, the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature is the value of the maximum heat exchanger temperature minus the minimum heat exchanger temperature, that is, the temperature difference ΔT = T1max-T1min. For example, if the maximum heat exchanger temperature is 10°C and the minimum heat exchanger temperature is 3°C, the value of the temperature difference ΔT is 10°C minus 3°C, which is equal to 7°C.

[0052] S203, determining a current target bias flow level of the multi-split air conditioning system according to the temperature difference, and executing a bias flow correction program that matches the target bias flow level.

[0053] The system is pre-set with a numerical range. According to the obtained temperature difference, the numerical range to which the temperature difference belongs is determined, and the current target bias level of the multi-split air-conditioning system can be determined. The target bias level represents the degree of bias in the multi-split air-conditioning system, which can be divided into multiple levels, and each level has a corresponding bias correction program. According to the determined target bias level, the implementer can execute the corresponding bias correction program, thereby eliminating or mitigating the bias between units in the multi-split air-conditioning system.

[0054] In an embodiment of the present disclosure, when the first preset duration ends during heating operation or defrosting, the heat exchanger temperature of each parallel unit is obtained, and the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature is obtained. The maximum heat exchanger temperature is the maximum temperature that persists for the second preset duration among all the heat exchanger temperatures, and the minimum heat exchanger temperature is the minimum temperature that persists for the second preset duration among all the heat exchanger temperatures. The current target flow deviation level of the multi-split air-conditioning system is determined according to the temperature difference, and a flow deviation correction program matching the target flow deviation level is executed. The present disclosure can ensure that when the parallel air-conditioning system is in the heating mode, after refrigerant flow deviation is caused by various factors, the system performs refrigerant flow deviation correction control, and to the greatest extent, ensures that the frosting time and frosting degree of the heat exchangers of each module of the parallel system are consistent, and ensures the best reliability and comfort of the air-conditioning system.

[0055] Figure 3 is a flowchart of a control method for a multi-split air-conditioning system according to an embodiment of the present application, as Figure 3 shown, determining the current target flow deviation level of the multi-split air-conditioning system according to the temperature difference includes the following steps:

[0056] S301, identify the maximum heat exchanger temperature and the minimum heat exchanger temperature that persist for the second preset duration from all the heat exchanger temperatures, and obtain the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature.

[0057] Step S301 has been specifically introduced in the above embodiment and will not be elaborated here.

[0058] S302, in response to the temperature difference being greater than or equal to the first preset temperature value and less than the second preset temperature value, obtain the critical frosting temperature of the heat exchanger.

[0059] Among them, the first preset temperature value and the second preset temperature value are temperature values preset for judging the flow deviation level. Denote the first preset temperature value as N. Optionally, the magnitude of the first preset temperature value can be set to 0-5°C. Denote the second preset temperature value as M. Optionally, the magnitude of the second preset temperature value can be set to 3-10°C.

[0060] Judge the relationship between the above temperature difference ΔT = T1max - T1min and the first preset temperature value N and the second preset temperature value M. If the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M, then read the critical frosting temperature of the heat exchanger from inside the air conditioner, and record the critical frosting temperature of the heat exchanger as Tf. Optionally, the value range of Tf can be -1 to 1 °C. For example, set the first preset temperature value N to 0 °C and the second preset temperature value M to 10 °C. If the value of the temperature difference ΔT = T1max - T1min is 7 °C, at this time, it satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M, then according to the multi-connected air conditioner system, read the critical frosting temperature Tf of the heat exchanger from inside the air conditioner.

[0061] S303. In response to the critical frosting temperature being greater than or equal to the minimum heat exchanger temperature and less than the maximum heat exchanger temperature, determine that the target bias current level is the second bias current level.

[0062] According to the above-mentioned read critical frosting temperature Tf of the heat exchanger, compare the relationship between the critical frosting temperature Tf and the maximum heat exchanger temperature T1max and the minimum heat exchanger temperature T1min. If the minimum heat exchanger temperature T1min ≤ Tf < the maximum heat exchanger temperature T1max, then at this time, the unit corresponding to the minimum heat exchanger temperature T1min has a risk of frosting. If the duration of this temperature is greater than Tk, then judge that the target bias current level of the multi-connected air conditioner system at this time is the second bias current level. Among them, the value range of Tk can be 0 to 1 h. For example, if the first preset temperature value N is set to 0 °C and the second preset temperature value M is set to 10 °C, the above-obtained maximum heat exchanger temperature T1max is 7 °C, and the minimum heat exchanger temperature T1min is -2 °C. At this time, the value of the temperature difference ΔT = T1max - T1min is 9 °C, which satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M. If the value of the critical frosting temperature Tf is 0 °C, at this time, it satisfies the minimum heat exchanger temperature T1min ≤ Tf < the maximum heat exchanger temperature T1max, then judge that the target bias current level of the multi-connected air conditioner system at this time is the second bias current level.

[0063] S304. In response to the critical frosting temperature being less than the minimum heat exchanger temperature or greater than or equal to the maximum heat exchanger temperature, determine that the target bias current level is the first bias current level.

[0064] Determine the relationship between the above temperature difference ΔT = T1max - T1min and the first preset temperature value N, the second preset temperature value M, and the critical frosting temperature Tf. If the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M, and at the same time, the minimum heat exchanger temperature T1min > Tf or Tf ≥ the maximum heat exchanger temperature T1max is satisfied, then it is determined that the target deviation flow level of the multi-connected air conditioner system at this time is the first deviation flow level. For example, if the first preset temperature value N is set to 0 °C, the second preset temperature value M is set to 10 °C, the obtained maximum heat exchanger temperature T1max is 7 °C, and the minimum heat exchanger temperature T1min is 1 °C, at this time, the value of the temperature difference ΔT = T1max - T1min is 6 °C, which satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M. If the value of the critical frosting temperature Tf is 0 °C, and at this time, the minimum heat exchanger temperature T1min > Tf is satisfied, then it is determined that the target deviation flow level of the multi-connected air conditioner system at this time is the first deviation flow level.

[0065] S305. In response to the temperature difference being greater than or equal to the second preset temperature value, determine that the target deviation flow level is the second deviation flow level.

[0066] Determine the relationship between the above temperature difference ΔT = T1max - T1min and the second preset temperature value M. If ΔT = T1max - T1min ≥ the second preset temperature value M, then determine that the target deviation flow level of the multi-connected air conditioner system at this time is the second deviation flow level. For example, if the second preset temperature value M is set to 10 °C, and the value of the temperature difference ΔT = T1max - T1min is 12 °C, then it is considered that the target deviation flow level of the multi-connected air conditioner system at this time is the second deviation flow level.

[0067] S306. In response to the temperature difference being less than the first preset temperature value, determine that the multi-connected air conditioner system is not deviated.

[0068] Determine the relationship between the above temperature difference ΔT = T1max - T1min and the first preset temperature value N. If ΔT = T1max - T1min < the first preset temperature value N, then determine that the multi-connected air conditioner system is operating normally and there is no deviation. For example, if the first preset temperature value N is set to 0 °C, and the value of the temperature difference ΔT = T1max - T1min is -1 °C, then it is determined that the multi-connected air conditioner system is operating normally and there is no deviation, and there is no need to correct the deviation of the multi-connected air conditioner system.

[0069] The embodiment of the present application divides different target deviation flow levels according to different situations, which is convenient to execute an accurate and effective deviation correction program for the corresponding target deviation flow level.

[0070] Figure 4 is a flowchart of a control method for a multi-connected air conditioner system according to an embodiment of the present application, asFigure 4 As shown, when the target drift current level is the first drift current level, the drift current correction procedure for the first target drift current level includes the following steps:

[0071] S401, control the fan speed of the first parallel unit corresponding to the minimum heat exchanger temperature to increase.

[0072] When the target drift current level of the multi-connected air-conditioning system is the first drift current level or the second drift current level, it is necessary to enter the correction procedure corresponding to the drift current level. When executing the correction procedure, it is necessary to determine the unit corresponding to the minimum heat exchanger temperature T1min, and use this unit as the first parallel unit. Detect whether the fan speed of the first parallel unit is the highest speed. If the fan speed of the first parallel unit is not the highest speed, then increase the fan speed of the first parallel unit. It should be noted that when increasing the fan speed of the first parallel unit, increase one speed level each time. If after increasing one speed level, it still satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M or satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then continue to increase the fan speed. If it always satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M or satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then repeat this process until the fan speed reaches the highest speed; if during the process, when the fan speed is increased to a certain speed level and satisfies ΔT = T1max - T1min < the first preset temperature value N, it means that after the fan speed is increased to this speed level, the multi-connected air-conditioning system operates normally without drift current, then keep the current speed level and no longer make corrections.

[0073] S402, in response to the fan speed increasing to the maximum speed and the temperature difference still being within the temperature range corresponding to the target drift current level, correct the first target superheat degree of the first electronic expansion valve of the first parallel unit, and adjust the opening degree of the first electronic expansion valve based on the first target superheat degree.

[0074] If after the fan speed reaches the highest speed, it still satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M or satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then adjust the target superheat degree of the electronic expansion valve corresponding to the first parallel unit corresponding to the minimum heat exchanger temperature. Among them, the electronic expansion valve corresponding to the first parallel unit is denoted as the first electronic expansion valve, and the target superheat degree of the electronic expansion valve corresponding to the first parallel unit is denoted as the first target superheat degree.

[0075] It should be noted that the first target superheat of the electronic expansion valve is denoted as SHS1, and the value of SHS1 generally ranges from 0 to 5 °C. The first target superheat is corrected once every time interval Ts1, and the correction value each time is n1, and the value of n1 generally ranges from 0 to 1 °C. That is, the value of the first target superheat after one correction is equal to SHS1 + n1, and the opening of the first electronic expansion valve is adjusted so that the value of the first target superheat after one correction is equal to SHS1 + n1. If after one correction, it still satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M or satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then continue to perform the second correction after time interval Ts1 with a step size of n1. If it always satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M or satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then repeat this process until the first target superheat is adjusted to the maximum allowable target superheat SHS max. If during the process, when the correction reaches a certain first target superheat and satisfies ΔT = T1max - T1min < the first preset temperature value N, it indicates that when the first electronic expansion valve is at this opening, the multi-connected air-conditioning system operates normally without flow deviation, then keep the current opening of the first electronic expansion valve and no longer perform corrections. Among them, SHSmax is a preset value in the system.

[0076] S403, correct the second target superheat of the second electronic expansion valve of the second parallel unit corresponding to the maximum heat exchanger temperature, and adjust the opening of the second electronic expansion valve based on the second target superheat.

[0077] If after the fan speed is increased to the highest speed, it still satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M or satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then adjust the target superheat of the electronic expansion valve corresponding to the second parallel unit with the maximum heat exchanger temperature. Among them, the electronic expansion valve corresponding to the second parallel unit is denoted as the second electronic expansion valve, and the target superheat of the electronic expansion valve corresponding to the second parallel unit is denoted as the second target superheat.

[0078] It should be noted that the second target superheat of the electronic expansion valve is denoted as SHS2, and the value of SHS2 generally ranges from 0 to 5 °C. The second target superheat is corrected once every time interval Ts2, and the correction value each time is n2, and the value of n2 generally ranges from 0 to 1 °C. That is, the value of the second target superheat after one correction is equal to SHS2 - n2, and the opening of the second electronic expansion valve is adjusted so that the value of the second target superheat after one correction is equal to SHS2 - n2. If after one correction, it still satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M or satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then continue to perform the second correction with a step size of n2 after the time interval Ts2. If it always satisfies the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M or satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then repeat this process until the second target superheat is adjusted to the minimum allowable target superheat SHSmin. Wherein, SHSmin is a preset value in the system.

[0079] S404, in response to the temperature difference no longer being within the temperature range corresponding to the target drift level, or, in response to the temperature difference still being within the temperature range corresponding to the target drift level, and the first target superheat being corrected to the maximum allowable superheat and the second target superheat being corrected to the minimum allowable superheat, stop further correcting the first target superheat and the second target superheat.

[0080] Wherein, if during the process, when a certain second target superheat is corrected and it satisfies ΔT = T1max - T1min < the first preset temperature value N, it indicates that when the second electronic expansion valve is at this opening, the multi-split air conditioner system operates normally without drift, then keep the current opening of the second electronic expansion valve and do not perform further correction.

[0081] If the first target superheat is corrected to the maximum allowable superheat SHSmax and the second target superheat is corrected to the minimum allowable superheat SHSmin, stop further correcting the first target superheat and the second target superheat.

[0082] The embodiment of the present application executes the drift correction procedure for the first target drift level on the multi-split air conditioner system with the target drift level being the first drift level, and can effectively handle the drift of the multi-split air conditioner system.

[0083] Figure 5 is a flowchart of the control method of the multi-split air conditioner system according to an embodiment of the present application. As Figure 5 shown, when the target drift level is the second drift level, the steps of executing the drift correction procedure for the second target drift level include the following:

[0084] S501, increase the fan speed of the first parallel unit corresponding to the minimum heat exchanger temperature.

[0085] Regarding step S501, it has been specifically introduced in the above embodiments and will not be elaborated here.

[0086] S502, in response to the fan speed increasing to the maximum speed and the temperature difference still being within the temperature range corresponding to the target deviation level, correct the first target superheat of the first electronic expansion valve of the first parallel unit, and adjust the opening of the first electronic expansion valve based on the first target superheat.

[0087] Regarding step S502, it has been specifically introduced in the above embodiments and will not be elaborated here.

[0088] S503, correct the second target superheat of the second electronic expansion valve of the second parallel unit corresponding to the maximum heat exchanger temperature, and adjust the opening of the second electronic expansion valve based on the second target superheat.

[0089] Regarding step S503, it has been specifically introduced in the above embodiments and will not be elaborated here.

[0090] S504, in response to the temperature difference still being within the temperature range corresponding to the target deviation level, and the first target superheat being corrected to the maximum allowable superheat and the second target superheat being corrected to the minimum allowable superheat, reduce the compressor frequency of the first parallel unit at a set time interval.

[0091] Among them, when the target deviation level of the multi-connected air-conditioning system is the second deviation level, if after the first target superheat is corrected to the maximum allowable superheat and the second target superheat is corrected to the minimum allowable superheat, it still satisfies ΔT = T1max - T1min ≥ the second preset temperature value M, then reduce the compressor frequency of the first parallel unit. Among them, denote the compressor frequency of the first parallel unit as P, reduce the compressor frequency of the first parallel unit once every time Ts, and the value reduced each time is x, that is, the compressor frequency P1 of the first parallel unit after one reduction is P - x, and repeat this step until the compressor frequency of the first parallel unit is reduced to the minimum allowable frequency.

[0092] The embodiment of the present application executes the deviation correction program for the second target deviation level on the multi-connected air-conditioning system with the second target deviation level, which can effectively handle the deviation of the multi-connected air-conditioning system.

[0093] Figure 6 is a flowchart of the control method of the multi-connected air-conditioning system according to an embodiment of the present application. As Figure 6 shown, based on the above embodiments, executing the deviation correction program for the second target deviation level includes the following steps:

[0094] S601. In response to the temperature difference still being within the temperature range corresponding to the target deviation current level, and the first target superheat degree being corrected to the maximum allowable superheat degree and the second target superheat degree being corrected to the minimum allowable superheat degree, reduce the compressor frequency of the first parallel unit at set time intervals.

[0095] Regarding step S601, it has been specifically introduced in the above embodiments and will not be elaborated here.

[0096] S602. In response to the temperature difference no longer being within the temperature range corresponding to the target deviation current level, stop further reducing the compressor frequency.

[0097] When the compressor frequency of the first parallel unit is reduced to a certain compressor frequency and satisfies ΔT = T1max - T1min < the second preset temperature value M, it indicates that when the compressor frequency of the first parallel unit is at this frequency, the multi-connected air-conditioning system operates normally without deviation current. Then, maintain the compressor frequency of the first parallel unit and do not reduce it further.

[0098] S603. In response to the compressor frequency being reduced to the minimum allowable frequency, send an alarm message.

[0099] If it still satisfies ΔT = T1max - T1min ≥ the second preset temperature value M when the compressor frequency of the first parallel unit is reduced to the minimum allowable frequency, then a maintenance warning is issued for the first parallel unit at this time.

[0100] The embodiment of the present application executes the deviation current correction program for the second target deviation current level on the multi-connected air-conditioning system with the target deviation current level being the second deviation current level, which can effectively handle the deviation current of the multi-connected air-conditioning system.

[0101] Figure 7 It is the overall flowchart of the control method of the multi-connected air-conditioning system according to an embodiment of the present application. As Figure 7 shown, the control method of the multi-connected air-conditioning system includes the following steps:

[0102] S701. After the first preset duration of heating operation or defrosting ends, obtain the heat exchanger temperature of each parallel unit.

[0103] S702. From all the heat exchanger temperatures, identify the maximum heat exchanger temperature T1max and the minimum heat exchanger temperature T1min that last for the second preset duration, and obtain the temperature difference ΔT between the maximum heat exchanger temperature and the minimum heat exchanger temperature.

[0104] Regarding the specific introduction of the above S701 - S702, it has been elaborated in detail in the above embodiments and will not be repeated here.

[0105] S703. In response to satisfying the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M, and simultaneously satisfying the minimum heat exchanger temperature T1min > Tf or satisfying Tf ≥ the maximum heat exchanger temperature T1max, determine that the target offset current level is the first offset current level.

[0106] S704. In response to satisfying the first preset temperature value N ≤ ΔT = T1max - T1min < the second preset temperature value M, and simultaneously satisfying the minimum heat exchanger temperature T1min ≤ Tf < the maximum heat exchanger temperature T1max, determine that the target offset current level is the second offset current level.

[0107] S705. In response to ΔT = T1max - T1min ≥ the second preset temperature value M, determine that the target offset current level is the second offset current level.

[0108] S706. In response to ΔT = T1max - T1min < the first preset temperature value N, determine that the multi - split air - conditioning system is not offset.

[0109] Regarding the above S703 - S706, the above embodiments have been introduced in detail and will not be elaborated here.

[0110] S707. Control the fan speed of the first parallel unit corresponding to the minimum heat exchanger temperature to increase.

[0111] S708. In response to the fan speed increasing to the maximum speed and the temperature difference still being within the temperature range corresponding to the target offset current level, correct the first target superheat of the first electronic expansion valve of the first parallel unit, and adjust the opening of the first electronic expansion valve based on the first target superheat.

[0112] S709. Correct the second target superheat of the second electronic expansion valve of the second parallel unit corresponding to the maximum heat exchanger temperature, and adjust the opening of the second electronic expansion valve based on the second target superheat.

[0113] Regarding the above S707 - S709, the above embodiments have been introduced in detail and will not be elaborated here.

[0114] S710. In response to the temperature difference no longer being within the temperature range corresponding to the target offset current level, stop continuously correcting the first target superheat and the second target superheat.

[0115] S711. In response to the temperature difference still being within the temperature range corresponding to the target offset current level, and the first target superheat being corrected to the maximum allowable superheat and the second target superheat being corrected to the minimum allowable superheat, stop continuously correcting the first target superheat and the second target superheat.

[0116] S712. If the determined target flow deviation level is the second flow deviation level, reduce the compressor frequency of the first parallel unit at set time intervals.

[0117] S713. During the process of reducing the compressor frequency, in response to the temperature difference no longer being within the temperature range corresponding to the target flow deviation level, stop further reducing the frequency of the compressor.

[0118] S714. In response to the compressor frequency being reduced to the minimum allowable frequency and the temperature difference still being within the temperature range corresponding to the target flow deviation level, issue an alarm message.

[0119] Regarding steps S710 - S714, the above embodiments have been described in detail and will not be elaborated here.

[0120] In the embodiments of the present disclosure, when the first preset duration ends after heating operation or defrosting, the heat exchanger temperature of each parallel unit is obtained, and the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature is obtained. Among them, the maximum heat exchanger temperature is the maximum temperature that persists for the second preset duration among all the heat exchanger temperatures, and the minimum heat exchanger temperature is the minimum temperature that persists for the second preset duration among all the heat exchanger temperatures. The current target flow deviation level of the multi - split air - conditioning system is determined based on the temperature difference, and a flow deviation correction program matching the target flow deviation level is executed. The present disclosure can ensure that when the parallel air - conditioning system is in the heating mode, after refrigerant flow deviation is caused by various factors, the system performs refrigerant flow deviation correction control, ensuring that the frosting time and frosting degree of the heat exchangers of each module in the parallel system are consistent to the greatest extent, and ensuring the best reliability and comfort of the air - conditioning system.

[0121] Figure 8 is a schematic structural diagram of a control device for a multi - split air - conditioning system according to an embodiment of the present application. As Figure 8 shown, the control device 800 of the multi - split air - conditioning system shown in the embodiments of the present application may include: a temperature acquisition module 81, a temperature difference acquisition module 82, and a flow deviation correction module 83. Among them:

[0122] The temperature acquisition module 81 is configured to obtain the heat exchanger temperature of each parallel unit when the first preset duration ends after heating operation or defrosting;

[0123] The temperature difference acquisition module 82 is configured to obtain the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature. Among them, the maximum heat exchanger temperature is the maximum temperature that persists for the second preset duration among all the heat exchanger temperatures, and the minimum heat exchanger temperature is the minimum temperature that persists for the second preset duration among all the heat exchanger temperatures;

[0124] The flow deviation correction module 83 is configured to determine the current target flow deviation level of the multi - split air - conditioning system based on the temperature difference and execute a flow deviation correction program matching the target flow deviation level.

[0125] Further, in a possible implementation manner of the embodiment of the present application, the bias current correction module 83 is further configured to: control the fan gear of the first parallel unit corresponding to the minimum heat exchanger temperature to increase.

[0126] Further, in a possible implementation manner of the embodiment of the present application, the bias current correction module 83 is further configured to: in response to the fan gear increasing to the maximum gear and the temperature difference still being within the temperature range corresponding to the target bias current level, correct the first target superheat degree of the first electronic expansion valve of the first parallel unit, and adjust the opening degree of the first electronic expansion valve based on the first target superheat degree; correct the second target superheat degree of the second electronic expansion valve of the second parallel unit corresponding to the maximum heat exchanger temperature, and adjust the opening degree of the second electronic expansion valve based on the second target superheat degree.

[0127] Further, in a possible implementation manner of the embodiment of the present application, the bias current correction module 83 is further configured to: in response to the temperature difference no longer being within the temperature range corresponding to the target bias current level, or in response to the temperature difference still being within the temperature range corresponding to the target bias current level, and the first target superheat degree being corrected to the maximum allowable superheat degree and the second target superheat degree being corrected to the minimum allowable superheat degree, stop further correcting the first target superheat degree and the second target superheat degree.

[0128] Further, in a possible implementation manner of the embodiment of the present application, the bias current correction module 83 is further configured to: in response to the temperature difference still being within the temperature range corresponding to the target bias current level, and the first target superheat degree being corrected to the maximum allowable superheat degree and the second target superheat degree being corrected to the minimum allowable superheat degree, reduce the compressor frequency of the first parallel unit at a set time interval.

[0129] Further, in a possible implementation manner of the embodiment of the present application, the bias current correction module 83 is further configured to: in response to the temperature difference no longer being within the temperature range corresponding to the target bias current level, stop further reducing the frequency of the compressor; or in response to the frequency of the compressor being reduced to the minimum allowable frequency, send an alarm message.

[0130] Further, in a possible implementation manner of the embodiment of the present application, the bias current correction module 83 is further configured to: in response to the temperature difference being greater than or equal to the first preset temperature value and less than the second preset temperature value, determine that the target bias current level is the first bias current level; in response to the temperature difference being greater than or equal to the second preset temperature value, determine that the target bias current level is the second bias current level; in response to the temperature difference being less than the first preset temperature value, determine that the multi-connected air-conditioning system is not biased.

[0131] Further, in a possible implementation manner of the embodiment of the present application, the bias current correction module 83 is further configured to: in response to the temperature difference being greater than or equal to the first preset temperature value and less than the second preset temperature value, obtain the critical frosting temperature of the heat exchanger; in response to the critical frosting temperature being greater than or equal to the minimum heat exchanger temperature and less than the maximum heat exchanger temperature, determine that the target bias current level is the second bias current level.

[0132] The embodiment of the present application also provides an electronic device 91, as Figure 9 shown. The electronic device 91 includes: a processor 92 and a memory 93 communicatively connected to the processor. The memory 93 stores instructions executable by at least one processor. The instructions are executed by at least one processor 92 to implement the control method of the multi-connected air conditioner system as shown in any of the above embodiments.

[0133] The embodiment of the present application also provides a non-transitory computer-readable storage medium storing computer instructions, wherein the computer instructions are used to cause a computer to implement the control method of the multi-connected air conditioner system as shown in any of the above embodiments.

[0134] The embodiment of the present application also provides a computer program product, including a computer program, which implements the control method of the multi-connected air conditioner system as shown in any of the above embodiments when executed by a processor.

[0135] The embodiment of the present application also provides a multi-connected air conditioner system, including the above-mentioned electronic device, and / or the above-mentioned storage medium, and / or the control device of the above-mentioned multi-connected air conditioner system, to implement the control method of the multi-connected air conditioner system as shown in any of the above embodiments.

[0136] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0137] In the present application, unless otherwise clearly defined and limited, the terms "install", "connect", "couple", "fix" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0138] In this application, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0139] In the description of this specification, the descriptions referring to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0140] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A control method for a multi-connected air conditioning system, characterized in that, Including: When the first preset duration ends during heating operation or defrosting, obtain the heat exchanger temperature of each parallel unit; Obtain the temperature difference between the maximum heat exchanger temperature and the minimum heat exchanger temperature. Among them, the maximum heat exchanger temperature is the maximum temperature that lasts for the second preset duration among all the heat exchanger temperatures, and the minimum heat exchanger temperature is the minimum temperature that lasts for the second preset duration among all the heat exchanger temperatures; Determine the current target flow deviation level of the multi-connected air-conditioning system according to the temperature difference, and execute a flow deviation correction program matching the target flow deviation level; The method further includes: In response to the temperature difference being greater than or equal to the first preset temperature value and less than the second preset temperature value, determine that the target flow deviation level is the first flow deviation level; In response to the temperature difference being greater than or equal to the second preset temperature value, determine that the target flow deviation level is the second flow deviation level; In response to the temperature difference being less than the first preset temperature value, determine that the multi-connected air-conditioning system has no flow deviation; In response to the temperature difference being greater than or equal to the first preset temperature value and less than the second preset temperature value, obtain the critical frosting temperature of the heat exchanger; In response to the critical frosting temperature being greater than or equal to the minimum heat exchanger temperature and less than the maximum heat exchanger temperature, determine that the target flow deviation level is the second flow deviation level.

2. The method according to claim 1, characterized in that, The execution of the flow deviation correction program matching the target flow deviation level includes: Control the fan speed of the first parallel unit corresponding to the minimum heat exchanger temperature to increase.

3. The method according to claim 2, wherein It further includes: In response to the fan speed rising to the maximum speed and the temperature difference still being within the temperature range corresponding to the target flow deviation level, correct the first target superheat of the first electronic expansion valve of the first parallel unit, and adjust the opening of the first electronic expansion valve based on the first target superheat; Correct the second target superheat of the second electronic expansion valve of the second parallel unit corresponding to the maximum heat exchanger temperature, and adjust the opening of the second electronic expansion valve based on the second target superheat.

4. The method according to claim 3, wherein It further includes: In response to the temperature difference no longer being within the temperature range corresponding to the target flow deviation level, or in response to the temperature difference still being within the temperature range corresponding to the target flow deviation level, and the first target superheat being corrected to the maximum allowable superheat and the second target superheat being corrected to the minimum allowable superheat, stop further correcting the first target superheat and the second target superheat.

5. The method according to claim 3, characterized in that, It further includes: In response to the temperature difference still being within the temperature range corresponding to the target flow deviation level, and the first target superheat being corrected to the maximum allowable superheat and the second target superheat being corrected to the minimum allowable superheat, reduce the compressor frequency of the first parallel unit at a set time interval.

6. The method according to claim 5, wherein It further includes: In response to the temperature difference no longer being within the temperature range corresponding to the target flow deviation level, stop further reducing the frequency of the compressor; Or, In response to the compressor frequency being reduced to the minimum allowable frequency, send an alarm message.

7. An electronic device, including: At least one processor; And A memory communicatively connected to the at least one processor; wherein, The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to enable the at least one processor to execute the method according to any one of claims 1-6.

8. A non-transitory computer-readable storage medium storing computer instructions, wherein, The computer instructions are used to cause the computer to execute the method according to any one of claims 1-6.

9. A computer program product, comprising a computer program which, when executed by a processor, implements the method according to any one of claims 1-6.

10. A multi-connected air-conditioning system, characterized in that, Comprising the electronic device according to claim 7, and / or the storage medium according to claim 8.

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