Control method of multi-connected air conditioning system, multi-connected air conditioning system, and storage medium

Abstract

The present application relates to air conditioner control technical field, especially to a kind of multi-connected air conditioning system control method, multi-connected air conditioning system and computer readable storage medium.Therein, the method includes: obtaining the energy demand parameter of target indoor unit, and the target indoor unit is the indoor unit with capacity demand;According to the energy demand parameter, the target opening of the electronic expansion valve of the target indoor unit is determined;The electronic expansion valve is controlled to operate at the target opening.Through the energy demand parameter of target indoor unit, the opening of its electronic expansion valve is adjusted, and when the over-proportioning phenomenon or the under-proportioning phenomenon of multi-connected air conditioning system occurs, the electronic expansion valve can also accurately control the temperature output of multi-connected air conditioning system.The control accuracy of air conditioning system capacity output is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning control technology, and in particular to a control method for a multi-split air conditioning system, a multi-split air conditioning system, and a computer-readable storage medium. Background Technology

[0002] In a multi-split air conditioning system, users can turn on one or any number of indoor units as needed. When all indoor units are turned on, an over-split phenomenon may occur (i.e., the total power of the indoor units exceeds the power of the outdoor units), while when only some indoor units are turned on, a under-split phenomenon may occur (i.e., the total power of the indoor units is less than the power of the outdoor units).

[0003] In relevant multi-split air conditioning system control schemes, the opening degree of the electronic expansion valve is usually fixed. When the multi-split air conditioning system experiences over-distribution or under-distribution, there will be a defect in the control accuracy of the air conditioning system capacity output.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide a control method for a multi-split air conditioning system, a multi-split air conditioning system, and a storage medium, with the aim of improving the control accuracy of the air conditioning system's capacity output.

[0006] To achieve the above objectives, the present invention provides a control method for a multi-split air conditioning system, the method comprising:

[0007] Obtain the energy requirement parameters of the target indoor unit, wherein the target indoor unit is the indoor unit with energy requirements;

[0008] The target opening degree of the electronic expansion valve of the target indoor unit is determined based on the energy demand parameters.

[0009] The electronic expansion valve is controlled to operate at the target opening.

[0010] Optionally, the step of obtaining the energy requirement parameters of the indoor unit includes:

[0011] Obtain the total energy requirement of all the indoor units;

[0012] The energy demand parameter is determined based on the ratio between the total energy demand and the preset total energy demand corresponding to the outdoor unit.

[0013] Optionally, the step of determining the target opening degree of the electronic expansion valve of the target indoor unit based on the energy demand parameters includes:

[0014] The target opening coefficient is determined based on the outdoor ambient temperature corresponding to the multi-split air conditioning system.

[0015] The target opening is determined based on the energy demand parameter and the target opening coefficient.

[0016] Optionally, determining the target opening coefficient based on the outdoor ambient temperature corresponding to the multi-split air conditioning system includes:

[0017] Determine the preset ambient temperature range within which the outdoor ambient temperature falls;

[0018] The opening coefficient corresponding to the preset ambient temperature range is determined as the target opening coefficient.

[0019] Optionally, the step of determining the target opening based on the energy demand parameter and the target opening coefficient includes:

[0020] The reference opening degree is determined based on the energy demand parameters and the target opening degree coefficient;

[0021] The reference opening is corrected according to the opening correction value to obtain the target opening;

[0022] The opening correction value is determined based on the opening adjustment value of the electronic expansion valve in a preset state before the current moment. The preset state is that the exhaust temperature of the compressor of the multi-split air conditioning system is higher than a preset exhaust temperature threshold during operation.

[0023] Optionally, the control method for the multi-split air conditioning system further includes:

[0024] Obtain the operating time of the compressor in the multi-split air conditioning system;

[0025] The initial opening degree of the electronic expansion valve is determined based on the opening duration, and the electronic expansion valve is controlled to operate at the initial opening degree.

[0026] When the multi-split air conditioning system reaches the preset operating conditions, the step of obtaining the energy demand parameters of the target indoor unit is executed.

[0027] Optionally, the step of determining the initial opening degree of the electronic expansion valve based on the opening duration includes:

[0028] Determine the preset duration range in which the activation duration falls;

[0029] The preset opening value corresponding to the preset duration interval is determined to be the initial opening value;

[0030] The preset opening value is positively correlated with the outdoor ambient temperature.

[0031] Optionally, after the step of controlling the electronic expansion valve to operate at the target opening, the method further includes:

[0032] The exhaust temperature of the compressor of the multi-split air conditioning system is obtained at a first preset time interval;

[0033] When the exhaust temperature is greater than the preset exhaust temperature threshold, the electronic expansion valve is controlled to increase its current opening.

[0034] Return to the step of obtaining the exhaust temperature of the target indoor unit after the first preset time interval, until the exhaust temperature is less than or equal to the preset exhaust temperature threshold.

[0035] In addition, to achieve the above objectives, the present invention also provides a multi-split air conditioning system, the multi-split air conditioning system comprising: a memory, a processor, and a control program for the multi-split air conditioning system stored in the memory and executable on the processor, wherein when the control program for the multi-split air conditioning system is executed by the processor, the steps of the control method for the multi-split air conditioning system as described above are implemented.

[0036] In addition, to achieve the above objectives, the present invention also provides a computer-readable storage medium storing a control program for a multi-split air conditioning system, wherein the control program for the multi-split air conditioning system, when executed by a processor, implements the steps of the control method for the multi-split air conditioning system as described above.

[0037] This invention provides a control method for a multi-split air conditioning system, a multi-split air conditioning system, and a storage medium. The opening of the electronic expansion valve is adjusted by the energy demand parameters of the target indoor unit. The opening of the electronic expansion valve is no longer fixed, but is adjusted to adapt to the energy demand of the indoor unit, ensuring that the capacity output of the multi-split air conditioning system matches the energy demand, thereby improving the control accuracy of the air conditioning system's capacity output. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the hardware operating environment of the multi-split air conditioning system according to an embodiment of the present invention;

[0039] Figure 2 This is a flowchart illustrating the first embodiment of the control method for a multi-split air conditioning system according to the present invention.

[0040] Figure 3 This is a flowchart illustrating a second embodiment of the control method for a multi-split air conditioning system according to the present invention.

[0041] Figure 4 This is a flowchart illustrating a third embodiment of the control method for a multi-split air conditioning system according to the present invention.

[0042] Figure 5 This is a flowchart illustrating the fourth embodiment of the control method for a multi-split air conditioning system according to the present invention.

[0043] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0044] In relevant multi-split air conditioning system control schemes, the opening degree of the electronic expansion valve is usually fixed. When the multi-split air conditioning system experiences over-distribution or under-distribution, there will be a defect in the control accuracy of the air conditioning system capacity output.

[0045] This application adjusts the opening of the electronic expansion valve by measuring the energy demand parameters of the target indoor unit. When the multi-split air conditioning system experiences over- or under-split phenomena, the electronic expansion valve can adapt to the energy demand of the indoor unit and adjust accordingly, ensuring that the capacity output of the multi-split air conditioning system matches the energy demand, thereby improving the control accuracy of the air conditioning system's capacity output.

[0046] To better understand the above technical solutions, exemplary embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0047] As one implementation scheme, Figure 1 This is a schematic diagram of the hardware operating environment of the multi-split air conditioning system involved in the embodiments of the present invention.

[0048] like Figure 1 As shown, the multi-split air conditioning system may include: a processor 1001, such as a CPU; a memory 1005; a user interface 1003; a network interface 1004; and a communication bus 1002. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed RAM or a stable, non-volatile memory, such as a disk drive. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0049] Those skilled in the art will understand that Figure 1 The architecture of the multi-split air conditioning system shown in the figure does not constitute a limitation on the multi-split air conditioning system. It may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0050] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and a control program for the multi-split air conditioning system. The operating system is a program that manages and controls the hardware and software resources of the multi-split air conditioning system, as well as the operation of the control program and other software or programs.

[0051] exist Figure 1 In the multi-split air conditioning system shown, the user interface 1003 is mainly used to connect to the terminal and communicate data with the terminal; the network interface 1004 is mainly used to connect to the back-end server and communicate data with the back-end server; the processor 1001 can be used to call the control program of the multi-split air conditioning system stored in the memory 1005.

[0052] In this embodiment, the multi-split air conditioning system includes: a memory 1005, a processor 1001, and a control program for the multi-split air conditioning system stored in the memory and executable on the processor, wherein:

[0053] When processor 1001 calls the control program of the multi-split air conditioning system stored in memory 1005, it performs the following operations:

[0054] Obtain the energy requirement parameters of the target indoor unit, wherein the target indoor unit is the indoor unit with energy requirements;

[0055] The target opening degree of the electronic expansion valve of the target indoor unit is determined based on the energy demand parameters.

[0056] The electronic expansion valve is controlled to operate at the target opening.

[0057] When processor 1001 calls the control program of the multi-split air conditioning system stored in memory 1005, it performs the following operations:

[0058] Obtain the total energy requirement of all the indoor units;

[0059] The energy demand parameter is determined based on the ratio between the total energy demand and the preset total energy demand corresponding to the outdoor unit.

[0060] When processor 1001 calls the control program of the multi-split air conditioning system stored in memory 1005, it performs the following operations:

[0061] The target opening coefficient is determined based on the outdoor ambient temperature corresponding to the multi-split air conditioning system.

[0062] The target opening is determined based on the energy demand parameter and the target opening coefficient.

[0063] When processor 1001 calls the control program of the multi-split air conditioning system stored in memory 1005, it performs the following operations:

[0064] Determine the preset ambient temperature range within which the outdoor ambient temperature falls;

[0065] The opening coefficient corresponding to the preset ambient temperature range is determined as the target opening coefficient.

[0066] When processor 1001 calls the control program of the multi-split air conditioning system stored in memory 1005, it performs the following operations:

[0067] The reference opening degree is determined based on the energy demand parameters and the target opening degree coefficient;

[0068] The reference opening is corrected according to the opening correction value to obtain the target opening;

[0069] The opening correction value is determined based on the opening adjustment value of the electronic expansion valve in a preset state before the current moment. The preset state is that the exhaust temperature of the compressor of the multi-split air conditioning system is higher than a preset exhaust temperature threshold during operation.

[0070] When processor 1001 calls the control program of the multi-split air conditioning system stored in memory 1005, it performs the following operations:

[0071] Obtain the operating time of the compressor in the multi-split air conditioning system;

[0072] The initial opening degree of the electronic expansion valve is determined based on the opening duration, and the electronic expansion valve is controlled to operate at the initial opening degree.

[0073] When the multi-split air conditioning system reaches the preset operating conditions, the step of obtaining the energy demand parameters of the target indoor unit is executed.

[0074] When processor 1001 calls the control program of the multi-split air conditioning system stored in memory 1005, it performs the following operations:

[0075] Determine the preset duration range in which the activation duration falls;

[0076] The preset opening value corresponding to the preset duration interval is determined to be the initial opening value;

[0077] The preset opening value is positively correlated with the outdoor ambient temperature.

[0078] When processor 1001 calls the control program of the multi-split air conditioning system stored in memory 1005, it performs the following operations:

[0079] The exhaust temperature of the compressor of the multi-split air conditioning system is obtained at a first preset time interval;

[0080] When the exhaust temperature is greater than the preset exhaust temperature threshold, the electronic expansion valve is controlled to increase its current opening.

[0081] Return to the step of obtaining the exhaust temperature of the target indoor unit after the first preset time interval, until the exhaust temperature is less than or equal to the preset exhaust temperature threshold.

[0082] Based on the hardware architecture of the multi-split air conditioning system based on the above-mentioned air conditioning control technology, an embodiment of the control method of the multi-split air conditioning system of the present invention is proposed.

[0083] Reference Figure 2 In the first embodiment, the control method of the multi-split air conditioning system includes the following steps:

[0084] Step S10: Obtain the energy requirement parameters of the target indoor unit;

[0085] In this embodiment, the multi-split air conditioning system (hereinafter referred to as the air conditioning system) includes one outdoor unit and multiple indoor units connected to the outdoor unit. For the multi-split air conditioning system, the user can select to turn on one or more indoor units as needed. In this embodiment, the indoor unit with the capacity requirement is the target indoor unit, that is, the indoor unit that is turned on is the target indoor unit.

[0086] Optionally, the acquisition of energy requirements parameters can be achieved by pre-setting an indoor unit working cycle T. Every working cycle T, the indoor unit executes step S10 once, as well as the corresponding steps following step S10.

[0087] Step S20: Determine the target opening degree of the electronic expansion valve of the target indoor unit based on the energy demand parameters;

[0088] In this embodiment, after obtaining the energy demand parameters, the air conditioning system determines the target opening degree of the electronic expansion valve of the target indoor unit based on the energy demand parameters. The target opening degree is characterized as the opening value of the electronic expansion valve of the target indoor unit in the next working cycle.

[0089] Optionally, a calculation formula between the energy requirement parameters and the target opening degree can be established in advance, and the compressor superheat can be substituted into the calculation formula to calculate the target opening degree.

[0090] Alternatively, the range of energy demand parameters can be determined, and the target opening value can be determined based on this range. Specifically, based on the acquired energy demand parameters, the target opening value of the electronic expansion valve stored in the memory is retrieved. The control motherboard outputs an opening value adjustment signal, causing the electronic expansion valve to adjust its opening value according to the signal, bringing it close to the target opening value.

[0091] Understandably, before the electronic expansion valve obtains the target opening degree determined by the energy demand parameters in the current working cycle to control the heat output, the electronic expansion valve controls the heat output with the historical target opening degree determined in the previous working cycle. Furthermore, if no historical target opening degree exists, a preset initial opening degree value is obtained to control the heat output.

[0092] Optionally, the target opening degree can be increased, the same as, or decreased compared to the current opening degree of the electronic expansion valve.

[0093] Step S30: Control the electronic expansion valve to operate at the target opening degree.

[0094] In this embodiment, after determining the target opening degree, the electronic expansion valve is controlled to operate at the target opening degree.

[0095] Optionally, the controller of the air conditioning system can input the target opening degree to the electronic expansion valve, and the electronic expansion valve can generate corresponding opening degree control parameters according to the target opening degree, and control the valve to move to the target opening degree according to the opening degree control parameters.

[0096] Alternatively, after the controller of the air conditioning system determines the target opening degree, it can directly generate the opening degree control parameters corresponding to the target opening degree, and then send the opening degree control parameters to the electronic expansion valve. The electronic expansion valve then controls the valve to move to the target opening degree according to the opening degree control parameters.

[0097] In this embodiment, the opening of the electronic expansion valve is adjusted by the energy demand parameters of the target indoor unit. When the multi-split air conditioning system experiences over- or under-split phenomena, the electronic expansion valve can adjust its opening accordingly to adapt, thereby improving the control accuracy of the air conditioning system's capacity output.

[0098] Furthermore, in this embodiment, step S10 includes:

[0099] Step S11: Obtain the total energy requirement of all indoor units;

[0100] Step S12: Determine the energy demand parameter based on the ratio between the total energy demand and the preset total energy demand corresponding to the outdoor unit.

[0101] Optionally, in this embodiment, the energy demand parameter can be characterized as the ratio of the total energy demand of the turned-on indoor units to the standard configuration capacity requirement preset by the controller. For example, when the total energy demand of the turned-on indoor units is 3000W and the standard configuration capacity requirement preset by the controller is 2000W, the energy demand parameter is 1.5.

[0102] Optionally, the total energy demand can be obtained by installing sensors in each indoor unit to monitor indoor temperature and humidity data in real time. The data collected by the sensors is then uploaded to the central controller via wireless transmission. After data aggregation and processing, the total energy demand is calculated by substituting the data into a preset formula: the energy demand data of all indoor units with energy demand are summed to obtain the total energy demand of the indoor units.

[0103] Optionally, the preset total energy demand can be determined based on the selected outdoor unit model and pre-designed parameters.

[0104] For example, assuming the energy demand parameter is the ratio of the total output power of the indoor unit to the output power of the outdoor unit, and assuming the energy demand parameter is 0.8, then the target opening degree in the numerical range corresponding to the energy demand parameter is determined to be 0.9, and the electronic expansion valve adjusts its valve opening degree to 90%.

[0105] It should be noted that when more than one target indoor unit has energy demand, the expansion valve of each target indoor unit in the air conditioning system should be at the target opening degree. Of course, as another optional implementation, in this embodiment, the corresponding expansion valve opening degree can also be determined according to the energy demand of each individual indoor unit, that is, the opening degree is different for different indoor units with different energy demands.

[0106] In this embodiment, the energy demand parameter is determined based on the ratio between the total energy demand of the activated indoor units and the preset standard energy demand. When the multi-split air conditioning system experiences over- or under-split phenomena, the electronic expansion valve can adjust its opening accordingly to adapt, thereby improving the control accuracy of the air conditioning system's capacity output.

[0107] Reference Figure 3 In the second embodiment, based on the first embodiment, step S20 includes:

[0108] Step S21: Determine the target opening coefficient based on the outdoor ambient temperature corresponding to the multi-split air conditioning system;

[0109] Step S22: Determine the target opening based on the energy demand parameter and the target opening coefficient.

[0110] Optionally, in this embodiment, the target opening degree can be determined by calculation using a formula. The opening degree coefficient represents the calculation coefficient of the target opening degree. Since different outdoor ambient temperatures also affect the heat output of the indoor fan, the opening degree coefficient can be correlated with the outdoor ambient temperature.

[0111] Specifically, in this embodiment, the outdoor unit is equipped with a temperature sensor to collect the outdoor temperature around it. The air conditioning system obtains the current outdoor ambient temperature collected by the outdoor unit and determines the opening coefficient corresponding to the current outdoor ambient temperature as the target opening coefficient corresponding to that temperature.

[0112] For example, in some implementations, let the target opening be P1, the energy requirement parameter be X1, and the opening coefficients be y1 and z1. Then, the formula for calculating the target opening P1 is:

[0113] P1=y1(X1-1)+z1

[0114] Among them, y1 and z1 are quantities related to the outdoor ambient temperature.

[0115] In this embodiment, the target opening degree is calculated using energy demand parameters and a target opening degree coefficient, and the opening degree coefficient is related to the outdoor ambient temperature. This allows the electronic expansion valve to adjust its opening degree in addition to adapting to changes in the indoor unit's energy demand, as well as changes in the outdoor ambient temperature, further improving the control accuracy of the air conditioning system's capacity output.

[0116] Furthermore, in this embodiment, step S21 includes:

[0117] Step S211: Determine the preset ambient temperature range in which the outdoor ambient temperature falls;

[0118] Step S212: Determine the opening coefficient corresponding to the preset ambient temperature range as the target opening coefficient.

[0119] Optionally, in this embodiment, the air conditioning system acquires the current outdoor ambient temperature collected by the outdoor unit, and determines the opening coefficient corresponding to the preset ambient temperature range in which the current outdoor ambient temperature is located as the target opening coefficient at that temperature. Furthermore, multiple preset ambient temperature ranges are set, each corresponding to an opening coefficient. Within these multiple preset ranges, the ambient temperature range is determined, and the opening coefficient corresponding to that range is used as the target opening coefficient.

[0120] For example, refer to the table below,

[0121]

[0122]

[0123] Among them, preset temperature value 1, preset temperature value 2, preset temperature value 3, and preset temperature value 4 are set according to actual conditions. The specific values ​​can be determined through methods such as experimentation or simulation.

[0124] In this embodiment, by setting the target opening coefficient corresponding to the outdoor ambient temperature in different preset ambient temperature ranges, the target opening is correlated with the change of outdoor ambient temperature. Thus, when the electronic expansion valve adjusts its opening, it can adapt to changes in the indoor unit's functional needs as well as changes in the outdoor ambient temperature, further improving the control accuracy of the air conditioning system's capacity output.

[0125] Furthermore, in this embodiment, step S22 includes:

[0126] Step S221: Determine the reference opening degree based on the energy demand parameters and the target opening degree coefficient;

[0127] Step S222: Correct the reference opening based on the opening correction value to obtain the target opening.

[0128] Optionally, in this embodiment, based on the previous embodiment, the target opening degree in the aforementioned embodiment is used as a reference opening degree, and an opening degree correction value is introduced to correct the reference opening degree, thereby obtaining the corrected target opening degree. The opening degree correction value represents the amount of correction to the opening degree of the electronic expansion valve when the exhaust temperature of the air conditioning system compressor is greater than a preset temperature threshold.

[0129] It should be noted that the opening correction value obtained by the indoor unit in different operating cycles is different, and the opening correction value of the current operating cycle is related to the opening correction value of the previous operating cycle. The operating cycle refers to the duration of the air conditioning system from start to finish. It should be noted that this value is 0 by default for the initial calculation.

[0130] For example, taking the target opening P1 = y1(X1-1) + z1 in the aforementioned implementation as the reference opening, with X1 as the required parameter and ΔP as the opening correction value, the formula for calculating the target opening P2 is:

[0131] P2=y1(X1-1)+z1+△P=P1+△P

[0132] Among them, y1 and z1 are quantities related to the outdoor ambient temperature.

[0133] In this embodiment, the opening correction value is determined based on the opening adjustment value of the electronic expansion valve in the preset state before the current moment, wherein the preset state is that the exhaust temperature of the compressor of the multi-split air conditioning system is higher than the preset exhaust temperature threshold during operation.

[0134] For example, assuming the first preset exhaust temperature threshold of the target indoor unit is 25°C, the historical opening correction values ​​obtained in the previous operating cycle when the exhaust temperature exceeded 25°C are as follows:

[0135] Correction value 1 = 0.2

[0136] Correction value 2 = 0.3

[0137] Correction value 3 = 0.1

[0138] Correction value 4 = 0.5

[0139] Based on the above data, the sum of the historical opening correction values ​​can be calculated as 0.2 + 0.3 + 0.1 + 0.5 = 1.1.

[0140] Since the historical opening correction value of the target indoor unit is 1.1 due to the exhaust temperature being higher than the first preset exhaust temperature threshold, the opening correction value for the current operating cycle can be determined to be 2.6.

[0141] In this embodiment, an opening correction value is introduced to correct the reference opening, thereby obtaining the corrected target opening. The opening correction value represents the amount of correction to the opening of the electronic expansion valve when the exhaust temperature of the air conditioning system compressor is higher than a preset temperature threshold. Thus, when the exhaust temperature of the air conditioning system compressor is high, the opening value is adjusted to lower the exhaust temperature. Furthermore, the opening correction value can also be associated with correction values ​​in the historical cycles of the air conditioning system. Each time the exhaust temperature is higher than the preset temperature threshold, the opening is adjusted once, and the corrected opening value is recorded. The corrected opening values ​​recorded in the historical cycles are summed to obtain the corresponding opening correction value for the current operating cycle, which is then used to correct the opening. This method helps to balance the influence of historical cycles, thereby more accurately estimating the opening in the current cycle. In addition, this method can improve the accuracy of prediction because it considers parameters from past cycles and applies them to the current cycle, improving the control accuracy of the air conditioning system's capacity output.

[0142] Reference Figure 4 In the third embodiment, based on the first embodiment, before step S10, the following steps are further included:

[0143] Step S40: Obtain the start-up duration of the compressor in the multi-split air conditioning system;

[0144] Step S50: Determine the initial opening degree of the electronic expansion valve based on the opening duration, and control the electronic expansion valve to operate at the initial opening degree for a preset duration;

[0145] Step S60: When the multi-split air conditioning system reaches the preset operating conditions, the step of obtaining the energy demand parameters of the target indoor unit is executed.

[0146] Optionally, in this embodiment, when the air conditioning system starts working, the compressor of the target indoor unit starts and the start time is recorded. The start time is used as the initial time to start timing, thereby recording the compressor's operating time.

[0147] In this embodiment, the initial opening degree is not a single fixed value, but rather there are multiple initial opening degrees. Furthermore, the initial opening degree of the electronic expansion valve is related to the compressor's operating duration. As the operating duration increases, the initial opening degree will change accordingly.

[0148] In this embodiment, the preset condition is as follows: after the electronic expansion valve runs for a preset time at the initial opening degree corresponding to the current opening duration, the process returns to step S60 to re-determine the initial opening degree value corresponding to the current opening duration, and then controls the sub-expansion valve to run for a preset time at the new initial opening degree. This continues until the compressor's opening duration is greater than or equal to the preset target opening degree calculation duration, at which point the process no longer returns to step S60, but instead jumps back to step S10.

[0149] The preset conditions can be understood as follows: after the compressor runs each initial opening for a preset time, the initialization of the target indoor unit is completed, and then the target opening of the electronic expansion valve of the target indoor unit is adjusted according to the energy demand parameters.

[0150] Understandably, under the preset conditions, the preset duration is less than the target opening calculation duration. After the electronic expansion valve runs for a preset duration according to each initial opening, it will just reach the target opening calculation duration.

[0151] For example, suppose the target opening calculation time is H, the preset time is h, and the initial number of openings is N, then:

[0152] H = h * N

[0153] In this embodiment, before implementing the scheme of adjusting the opening degree of the target indoor unit according to the energy demand parameters, the target indoor unit is first started, and the electronic expansion valve of the target indoor unit is allowed to operate at a preset opening value for a certain period of time, thereby completing the initialization of the target indoor unit. After initialization, the energy demand parameters of the target indoor unit tend to stabilize, so that the subsequent adjustment of the opening degree of the electronic expansion valve according to the energy demand parameters is more accurate. This avoids inaccurate adjustment results caused by adjusting the opening degree before the energy demand parameters of the target indoor unit have stabilized, thereby improving the accuracy of the target opening degree determination and improving the control accuracy of the air conditioning system capacity output.

[0154] Furthermore, in this embodiment, step S50 further includes:

[0155] Step S51: Determine the preset duration range in which the activation duration is located;

[0156] Step S52: Determine the preset opening value corresponding to the preset duration interval as the initial opening value.

[0157] Optionally, in this embodiment, multiple preset time intervals are set, and each preset time interval has a different preset opening value. When the opening time is in a different preset time interval, the opening value corresponding to that interval is determined as the initial opening of the electronic expansion valve.

[0158] For example, the preset time intervals are set as: [0, T01], [T01, T02], [T02, T03], [T03, T04], and the preset opening values ​​corresponding to each interval are: P01, P02, P03, P04.

[0159] Duration range [0，T01] [T01, T02] [T02, T03] [T03, T04] Preset opening value P01 P02 P03 P04

[0160] The valve opening is preset to the initial opening 1 (P01) within the preset initial time 1 (T01) starting from the compressor start-up time.

[0161] The valve opening degree is the preset initial opening degree 2 (P02) within the time interval from T01 to the preset initial time 2 (T02);

[0162] The valve opening is the preset initial opening 3 (P03) within the time interval from T02 to the preset initial time 3 (T03);

[0163] Within T03 to the preset initial time 4 (T04), the valve opening is the preset initial opening 4 (P04).

[0164] If the compressor's operating time is greater than or equal to T04, the process will jump to the step of obtaining the energy demand parameters of the target indoor unit.

[0165] Furthermore, the preset opening value is related to the outdoor ambient temperature. When the outdoor ambient temperature is in different temperature ranges, the value of the preset opening will also change accordingly. Specifically, the higher the outdoor ambient temperature, the higher the value of the preset opening.

[0166] For example, the relationship between the preset opening value [P01-p04] and the outdoor ambient temperature T4 is shown in the table below.

[0167]

[0168] In this embodiment, the initial opening value is different when the opening duration is in different time ranges. The initial opening value is set in relation to the outdoor ambient temperature so that the target indoor unit can adapt to the changes in the outdoor ambient temperature during the initialization process. This makes the opening adjustment of the electronic expansion valve more precise, and the target indoor unit can also accurately control the temperature output during the initialization process.

[0169] Reference Figure 5 In the fourth embodiment, based on the first embodiment, after step S30, the method further includes:

[0170] Step S70: At a first preset time interval, obtain the exhaust temperature of the compressor of the multi-split air conditioning system;

[0171] Step S80: When the exhaust temperature is greater than the preset exhaust temperature threshold, control the electronic expansion valve to increase the current opening.

[0172] Step S90: Return to the step of obtaining the exhaust temperature of the target indoor unit after executing the first preset time interval, until the exhaust temperature is less than or equal to the preset exhaust temperature threshold.

[0173] Optionally, in this embodiment, in order to avoid the compressor's exhaust temperature being too high due to the adjustment of the opening degree of the electronic expansion valve according to the energy demand parameters, the exhaust temperature of the compressor of the multi-split air conditioning system is obtained every first preset time interval. When the exhaust temperature is greater than the preset exhaust temperature threshold, the electronic expansion valve enters the opening degree correction mode. In the opening degree correction mode, the electronic expansion valve is controlled to increase the current opening degree every first preset time interval until the exhaust temperature is less than or equal to the preset exhaust temperature threshold.

[0174] It should be noted that the preset exhaust temperature threshold mentioned in this embodiment is the same value as the preset exhaust temperature threshold in the previous embodiment.

[0175] For example, the electronic expansion valve operates according to the target opening determined based on energy demand parameters, and recalculates the opening every first preset time interval; simultaneously, it determines whether to perform exhaust temperature correction.

[0176] When the exhaust temperature is greater than the first preset exhaust temperature, control the opening degree of the electronic expansion valve to be + preset opening degree increment Ph.

[0177] After another preset time interval, return to recalculate the opening and determine whether to perform a correction for excessively high exhaust temperature.

[0178] If the exhaust temperature is still greater than the first preset exhaust temperature, control the opening of the electronic expansion valve again by the preset opening increment Ph.

[0179] This cycle continues until the exhaust temperature is lower than the first preset exhaust temperature, at which point the opening correction mode is exited.

[0180] In this embodiment, the exhaust temperature of the compressor of the multi-split air conditioning system is acquired at first preset time intervals. When the exhaust temperature is greater than the preset exhaust temperature threshold, the electronic expansion valve enters the opening correction mode. In the opening correction mode, the electronic expansion valve is controlled to increase the current opening every first preset time interval until the exhaust temperature is less than or equal to the preset exhaust temperature threshold. This avoids the compressor exhaust temperature from being too high due to the opening of the electronic expansion valve being adjusted according to the energy demand parameters, which would cause system abnormalities and improve the control accuracy of the air conditioning system's capacity output.

[0181] Furthermore, those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program includes program instructions and can be stored in a storage medium, which is a computer-readable storage medium. The program instructions are executed by at least one processor in the multi-split air conditioning system to implement the process steps of the embodiments of the above methods.

[0182] Therefore, the present invention also provides a computer-readable storage medium storing a control program for a multi-split air conditioning system, wherein the control program for the multi-split air conditioning system, when executed by a processor, implements the various steps of the control method for the multi-split air conditioning system as described in the above embodiments.

[0183] The computer-readable storage medium can be any computer-readable storage medium capable of storing program code, such as a USB flash drive, portable hard drive, read-only memory (ROM), magnetic disk, or optical disk.

[0184] It should be noted that, since the storage medium provided in the embodiments of this application is the storage medium used to implement the methods of the embodiments of this application, those skilled in the art can understand the specific structure and variations of the storage medium based on the methods described in the embodiments of this application, and therefore will not be repeated here. All storage media used in the methods of the embodiments of this application fall within the scope of protection of this application.

[0185] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0186] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0187] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0188] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0189] It should be noted that any reference signs placed between parentheses in the claims should not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claims. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by the same item of hardware. The use of the words first, second, and third, etc., does not indicate any order. These words can be interpreted as names.

[0190] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0191] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A control method for a multi-split air conditioning system, characterized in that, The multi-connected air conditioning system comprises an outdoor unit and multiple indoor units connected with the outdoor unit, the indoor unit comprises an electronic expansion valve, and the control method of the multi-connected air conditioning system comprises: obtaining the energy demand parameter of the target indoor unit, the target indoor unit being the indoor unit with capacity demand, comprising: obtaining the total energy demand of all indoor units; determining the energy demand parameter according to the ratio between the total energy demand and the preset total energy demand corresponding to the outdoor unit; determining the target opening degree coefficient according to the outdoor environment temperature corresponding to the multi-connected air conditioning system; determining the target opening degree of the electronic expansion valve of the target indoor unit according to the energy demand parameter and the target opening degree coefficient, comprising: determining the reference opening degree according to the energy demand parameter and the target opening degree coefficient; correcting the reference opening degree according to the opening degree correction value to obtain the target opening degree; wherein the opening degree correction value is determined according to the opening degree adjustment value of the electronic expansion valve under a preset state before the current time, and the preset state is that the discharge temperature of the compressor of the multi-connected air conditioning system is higher than the preset discharge temperature threshold during the running process; controlling the electronic expansion valve to operate at the target opening degree.

2. The control method of a multi-connected air conditioning system according to claim 1, wherein The target opening degree coefficient is determined according to the outdoor environment temperature corresponding to the multi-connected air conditioning system, comprising: determining a preset environment temperature interval in which the outdoor environment temperature is located; determining the opening degree coefficient corresponding to the preset environment temperature interval as the target opening degree coefficient.

3. The control method of a multi-connected air conditioning system according to claim 1, wherein The control method of the multi-connected air conditioning system further comprises: obtaining the opening duration of the compressor of the multi-connected air conditioning system; determining the initial opening degree of the electronic expansion valve according to the opening duration, and controlling the electronic expansion valve to operate at the initial opening degree; when the multi-connected air conditioning system operates to reach a preset condition, performing the step of obtaining the energy demand parameter of the target indoor unit.

4. The control method of a multi-connected air conditioning system according to claim 3, wherein The step of determining the initial opening degree of the electronic expansion valve according to the opening duration comprises: determining a preset duration interval in which the opening duration is located; determining the preset opening degree value corresponding to the preset duration interval as the initial opening degree; wherein the preset opening degree value is positively correlated with the outdoor environment temperature.

5. The control method of a multi-connected air conditioning system according to claim 1, wherein After the step of controlling the electronic expansion valve to operate at the target opening degree, further comprising: obtaining the discharge temperature of the compressor of the multi-connected air conditioning system at intervals of a first preset duration; when the discharge temperature is greater than a preset discharge temperature threshold, controlling the electronic expansion valve to increase the current opening degree; returning to perform the step of obtaining the discharge temperature of the target indoor unit at intervals of a first preset duration until the discharge temperature is less than or equal to the preset discharge temperature threshold.

6. A multi-connected air conditioning system, characterized by, The multi-connected air conditioning system comprises a memory, a processor, and a control program of the multi-connected air conditioning system stored on the memory and executable on the processor, and the control program of the multi-connected air conditioning system is executed by the processor to implement the steps of the control method of the multi-connected air conditioning system according to any one of claims 1 to 5.

7. A computer readable storage medium characterized in that, The computer readable storage medium stores the control program of the multi-connected air conditioning system, and the control program of the multi-connected air conditioning system is executed by the processor to implement the steps of the control method of the multi-connected air conditioning system according to any one of claims 1 to 5.

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