Air conditioner control method and apparatus, and multi-split air conditioner and storage medium

Abstract

The present application relates to an air conditioner control method and apparatus, and a multi-split air conditioner and a storage medium. The method in the present application comprises: when a multi-split air conditioner has both a heating requirement and a water heating requirement, acquiring a water tank temperature of a water heating tank in a water power module; on the basis of the water tank temperature, determining a control mode for the multi-split air conditioner; and then, according to the control mode for the air conditioner, adjusting the opening degree of a first throttling element corresponding to an indoor heat exchanger or the opening degree of a second throttling element corresponding to the water power module.

Description

Air conditioner control method, device, multi-split air conditioner and storage medium

[0001] This application claims priority to Chinese patent application No. 202310988402.6 filed on August 7, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the technical field of air conditioners, and in particular to an air conditioner control method and device, a multi-split air conditioner, and a storage medium. Background Art

[0003] A multi-split water heater is generally equipped with several air-conditioning indoor units and one or more hydraulic modules. The air-conditioning indoor units are used to regulate the room temperature, and the hydraulic modules are used to produce hot water. If the air-conditioning indoor units and the hydraulic modules are heating at the same time, there may be insufficient output of the heat pump unit, affecting the heating effect of the multi-split air conditioner.

[0004] The above content is only used to assist in understanding the technical solution of this application and does not constitute an admission that the above content is prior art. Technical issues

[0005] The main purpose of this application is to provide an air conditioner control method, device, multi-split air conditioner and storage medium, aiming to solve the technical problem of poor heating effect when the existing multi-split air conditioner is turned on for heating and hot water at the same time. Technical Solutions

[0006] To achieve the above-mentioned objectives, the present application provides an air conditioner control method, the air conditioner control method being applied to a multi-split air conditioner, the multi-split air conditioner comprising: an outdoor air conditioner, a plurality of indoor air conditioner units, and a hydraulic module, the outdoor air conditioner being respectively connected to each indoor air conditioner unit and the hydraulic module, the indoor air conditioner comprising: an indoor heat exchanger and a first throttling element corresponding to the indoor heat exchanger, the hydraulic module comprising a hot water tank and a second throttling element corresponding to the hot water tank;

[0007] The method comprises the following steps:

[0008] When the air conditioner has both heating and hot water demands, obtaining the water tank temperature of the hot water tank;

[0009] determining an air conditioner control mode corresponding to the water tank temperature;

[0010] The opening degree of the first throttle element and / or the second throttle element is adjusted according to the air conditioner control mode.

[0011] In one embodiment, adjusting the opening of the second throttling element includes:

[0012] determining a change in the opening of the second throttling element according to the middle temperature of the coil, the outlet temperature of the coil, and the water temperature of the water tank;

[0013] The opening of the second throttling element is adjusted according to the opening change value.

[0014] In one embodiment, determining the opening change value of the second throttling element according to the middle temperature of the coil, the coil outlet temperature, and the water temperature of the water tank includes:

[0015] obtaining the exhaust temperature of the compressor;

[0016] When the exhaust temperature is greater than an exhaust temperature threshold, determining a change in the opening of the second throttling element according to the exhaust temperature, the middle temperature of the coil, the coil outlet temperature, and the water temperature of the water tank;

[0017] When the exhaust temperature is less than or equal to the exhaust temperature threshold, the opening change value of the second throttling element is determined according to the middle temperature of the coil, the coil outlet temperature, and the water temperature of the water tank.

[0018] In one embodiment, determining the opening change value of the second throttling element according to the middle temperature of the coil, the coil outlet temperature, and the water temperature of the water tank includes:

[0019] determining an actual degree of subcooling based on the middle temperature of the coil and the outlet temperature of the coil;

[0020] Querying the target subcooling degree corresponding to the water temperature of the water tank;

[0021] An opening change value of the second throttling element is determined according to the target subcooling degree and the actual subcooling degree.

[0022] In one embodiment, adjusting the opening of the second throttling element according to the opening change value includes:

[0023] When the opening change value is greater than a preset threshold, adjusting the opening of the second throttling element according to the opening change value and a preset first coefficient;

[0024] When the opening change value is less than or equal to a preset threshold, the opening of the second throttling element is adjusted according to the opening change value and a preset second coefficient, and the preset first coefficient is greater than the preset second coefficient.

[0025] In one embodiment, it is determined whether the pressure of the refrigerant circuit in the air conditioner is abnormal based on the middle temperature of the coil and the temperature of the water tank;

[0026] If so, the opening of the second throttling element is adjusted according to the middle temperature of the coil and / or the water tank temperature until it is detected that the difference between the middle temperature of the coil and the water tank temperature is greater than the preset first temperature threshold for a duration greater than the preset first duration, or the water tank temperature is greater than the set temperature of the hot water tank.

[0027] In one embodiment, adjusting the opening of the second throttling element according to the middle temperature of the coil includes:

[0028] When the temperature of the middle portion of the coil is greater than or equal to a preset second temperature threshold, screening the opening change value to obtain a target opening change value, wherein the target opening change value is an opening change value greater than or equal to the preset threshold;

[0029] The opening of the second throttling element is adjusted according to the target opening change value.

[0030] In one embodiment, the air conditioner indoor unit further includes an electric auxiliary heating device corresponding to the hot water tank;

[0031] The method further comprises: adjusting the opening of the second throttling element according to the middle temperature of the coil and the temperature of the water tank;

[0032] When the difference between the water tank coil temperature and the water tank temperature is less than a preset second temperature threshold and the electric auxiliary heating device turns on electric heating, the opening of the second throttling element is adjusted according to a preset opening.

[0033] In one embodiment, the air conditioner control mode includes a first opening control mode;

[0034] Adjusting the opening of the first throttling element according to the first opening control mode includes:

[0035] Obtaining the outdoor ambient temperature of the area where the air conditioner outdoor unit is located;

[0036] Determining a target opening corresponding to the outdoor ambient temperature;

[0037] The opening of the first throttle element is adjusted according to the target opening.

[0038] In one embodiment, the air conditioner control mode includes a second opening control mode;

[0039] Adjusting the opening of the first throttling element according to the second opening control mode includes:

[0040] Obtaining the middle temperature of the target indoor heat exchanger with heating demand and the average middle temperature of each target indoor heat exchanger;

[0041] Calculating a temperature difference between the middle temperature and the middle temperature mean;

[0042] Determine the opening change value to be adjusted corresponding to the temperature difference;

[0043] The opening of the first throttling element is adjusted according to the opening change value to be adjusted.

[0044] In one embodiment, determining the air conditioner control mode corresponding to the water tank temperature includes:

[0045] When the water tank temperature is within a first temperature range, running a first opening control mode to adjust the opening of the first throttling element;

[0046] When the water tank temperature is in a second temperature range, the last operating opening control mode is operated, and the minimum value of the second temperature range is greater than the maximum value of the first temperature range;

[0047] When the water tank temperature is in a third temperature range, the second opening control mode is run to adjust the opening of the first throttling element, and the minimum value of the third temperature range is greater than the maximum value of the second temperature range.

[0048] In addition, to achieve the above-mentioned purpose, the present application also proposes an air conditioner control device, the air conditioner control device comprising:

[0049] an acquisition module, configured to acquire the water tank temperature of the hot water tank when the air conditioner has both heating and hot water demands;

[0050] a determination module, configured to determine an air conditioner control mode corresponding to the water tank temperature;

[0051] An adjustment module is used to adjust the opening of the first throttling element and / or the second throttling element according to the air conditioner control mode.

[0052] In addition, to achieve the above-mentioned purpose, the present application also proposes a multi-split air conditioner, which includes: a memory, a processor, and an air conditioner control program stored on the memory and runnable on the processor, and the air conditioner control program is configured to implement the steps of the air conditioner control method described above.

[0053] In addition, to achieve the above-mentioned purpose, the present application also proposes a storage medium, on which an air conditioner control program is stored. When the air conditioner control program is executed by a processor, the steps of the air conditioner control method described above are implemented. Beneficial effects

[0054] The present application obtains the water tank temperature of the hot water tank in the hydraulic module when the multi-split air conditioner has the demand for heating and hot water at the same time, determines the control mode of the multi-split air conditioner according to the water tank temperature, and then adjusts the opening of the first throttling element corresponding to the indoor heat exchanger or the second throttling element corresponding to the hydraulic module according to the control mode of the air conditioner, thereby adjusting the refrigerant flow ratio and the heating effect of the indoor heat exchanger or the hydraulic module, avoiding the technical problem of poor heating effect when the heating and hot water are turned on at the same time in the prior art multi-split air conditioner, and improving the heating effect of the multi-split air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] FIG1 is a schematic structural diagram of a multi-split air conditioner in a hardware operating environment according to an embodiment of the present application;

[0056] FIG2 is a flow chart of an embodiment of an air conditioner control method of the present application;

[0057] FIG3 is a schematic structural diagram of a multi-split air conditioner according to an embodiment of the air conditioner control method of the present application;

[0058] FIG4 is a flow chart of an embodiment of an air conditioner control method of the present application;

[0059] FIG5 is a flow chart of an embodiment of an air conditioner control method of the present application;

[0060] FIG6 is a structural block diagram of an embodiment of an air conditioner control device of the present application.

[0061] Description of Figure Numbers:

[0062] Reference number name Reference number name 1 Air conditioner outdoor unit LA hydraulic valve 2 Air conditioner indoor unit GA air pressure valve 3 Hydraulic module 121 First reversing device 11 Compressor 122 Second reversing device 12 Reversing device 31 Hot water tank 13 Outdoor heat exchanger EXV Electronic expansion valve

[0063] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Modes for Carrying Out the Invention

[0064] It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0065] Refer to Figure 1, which is a schematic diagram of the structure of a multi-split air conditioner in the hardware operating environment involved in the embodiment of the present application.

[0066] As shown in Figure 1, the multi-split air conditioner may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display and an input unit, such as a keyboard. The user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may include a standard wired interface or a wireless interface (such as a Wireless Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. The memory 1005 may also be a storage device independent of the processor 1001.

[0067] Those skilled in the art will understand that the structure shown in FIG1 does not constitute a limitation on the multi-split air conditioner, and may include more or fewer components than shown in the figure, or a combination of certain components, or a different arrangement of components.

[0068] As shown in FIG. 1 , the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module, and an air conditioner control program.

[0069] In the multi-split air conditioner shown in Figure 1, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the multi-split air conditioner of the present application can be set in the multi-split air conditioner, and the multi-split air conditioner calls the air conditioner control program stored in the memory 1005 through the processor 1001, and executes the air conditioner control method provided by the embodiment of the present application.

[0070] An embodiment of the present application provides an air conditioner control method. Referring to FIG. 2 , FIG. 2 is a flow chart of an embodiment of an air conditioner control method of the present application.

[0071] In this application, the air conditioner control method includes the following steps:

[0072] Step S10: When the air conditioner has both heating and hot water demands, obtaining the water tank temperature of the hot water tank.

[0073] It should be noted that the subject of this application may be the aforementioned air conditioner device, which has functions such as data processing, data communication, and program execution. The aforementioned air conditioner device may be a controller for a multi-split air conditioner. Of course, other devices with similar functions may also be used, and these implementation conditions do not impose any restrictions thereon. For ease of explanation, this embodiment uses a controller for a multi-split air conditioner as an example.

[0074] It is worth noting that the air conditioner in this application refers to a multi-split air conditioner. Referring to Figure 3, a multi-split air conditioner is an external unit connected to multiple internal units, which can realize the function of adjusting parameters such as air temperature, humidity, cleanliness and air flow rate in multiple rooms at the same time, including but not limited to cooling, heating and fresh air circulation modes.

[0075] It should be noted that the multi-split air conditioner in the present application includes an outdoor air conditioner, an indoor air conditioner and a hydraulic module. The outdoor air conditioner is respectively connected to each indoor air conditioner and the hydraulic module. The outdoor air conditioner includes: a compressor, an outdoor heat exchanger and at least two reversing devices. The indoor air conditioner includes at least one indoor heat exchanger. A hot water tank is provided at the end of the hydraulic module. Each reversing device is connected to the compressor and is mainly used to control the flow direction of the refrigerant in the multi-split air conditioner. The reversing device can be a four-way valve or a three-way valve. This application does not impose specific restrictions on this.

[0076] In addition, throttling elements are provided between the air-conditioning outdoor unit and each air-conditioning indoor unit and the hydraulic module. The throttling elements in this application include a first throttling element corresponding to the indoor heat exchanger and a second throttling element corresponding to the hot water tank, wherein the throttling elements include an electronic expansion valve and a capillary tube, etc. In this application, the electronic expansion valve is mainly used as an example for explanation, wherein the throttling elements between the air-conditioning outdoor unit and each air-conditioning indoor unit and the hydraulic module may include a main electronic expansion valve, and also include a branch electronic expansion valve corresponding to each air-conditioning indoor unit or hydraulic module. This application does not impose specific restrictions on this.

[0077] It can be understood that when the indoor heating mechanism of the multi-split air conditioner is in operation, the refrigerant is compressed by the compressor to obtain high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant is transported to the indoor heat exchanger through the four-way valve for condensation and heat dissipation. After the indoor heat exchanger exchanges heat with the indoor environment, medium-temperature and high-pressure refrigerant is obtained, and then through the throttling elements such as the electronic expansion valve and the main capillary mentioned above, low-pressure and medium-temperature refrigerant is obtained, which is transported to the outdoor heat exchanger for evaporation to obtain low-temperature and low-pressure refrigerant, and finally returns to the compressor through the four-way valve to complete a single heating process.

[0078] When there is a demand for hot water in a multi-split air conditioner, the refrigerant is compressed by the compressor to obtain high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant is transported to the hot water tank through a four-way valve. The hot water tank acts as a condenser. After heat exchange with the water channel in the hot water tank, the outlet water temperature is made greater than the inlet water temperature, thereby achieving heating. The refrigerant flows through the water channel of the hot water tank to obtain medium-temperature and high-pressure refrigerant, and then passes through the throttling elements such as the electronic expansion valve and the main line capillary mentioned above to obtain low-pressure and medium-temperature refrigerant, which is transported to the outdoor heat exchanger for evaporation to obtain low-temperature and low-pressure refrigerant, and finally flows back to the compressor through the four-way valve to complete a single heating process.

[0079] It should be understood that the water tank temperature includes but is not limited to the middle temperature of the coil, the coil outlet temperature and the water temperature in the water tank, wherein the value of the water tank temperature can be the average value between the water temperature at the top of the water tank and the water temperature at the bottom of the water tank. The middle temperature of the water tank coil refers to the refrigerant saturation temperature corresponding to the compressor exhaust pressure. In this application, the refrigerant saturation temperature is related to factors such as the refrigerant type and refrigerant pressure. Its main functions are temperature control, heat exchange and improving energy efficiency. Taking into account that there is pressure loss when the refrigerant passes through various heat exchange devices, and there is basically no pressure loss when the refrigerant is transmitted in the pipeline, this application uses the middle temperature of the coil of the hot water tank directly connected to the refrigerant output end of the compressor as the refrigerant saturation temperature corresponding to the exhaust pressure.

[0080] Step S20: Determine the air conditioner control mode corresponding to the water tank temperature.

[0081] In the present application, different control logics exist for the control methods of different throttling elements. For example, there are two control methods for the control method of the first throttling element corresponding to the indoor heat exchanger. One is to adjust the opening of the first throttling element according to the opening corresponding to the outdoor ambient temperature; the other is to determine the temperature difference based on the middle temperature of the indoor heat exchanger with heating demand and the average of the middle temperatures of each indoor heat exchanger with capacity demand, and adjust the opening of the first throttling element according to the opening corresponding to the temperature difference.

[0082] As for the control method of the second throttling element corresponding to the hot water tank, the control method of the second throttling element is determined to be automatic control or abnormal control according to the middle temperature of the hot water tank coil, the water temperature of the water tank and the coil outlet temperature. This application does not impose any specific restrictions on this.

[0083] Furthermore, the determining of the air conditioner control mode corresponding to the water tank temperature includes:

[0084] When the water tank temperature is within a first temperature range, running a first opening control mode to adjust the opening of the first throttling element;

[0085] When the water tank temperature is in a second temperature range, the last operating opening control mode is operated, and the minimum value of the second temperature range is greater than the maximum value of the first temperature range;

[0086] When the water tank temperature is in a third temperature range, the second opening control mode is run to adjust the opening of the first throttling element, and the minimum value of the third temperature range is greater than the maximum value of the second temperature range.

[0087] In one embodiment, the above-mentioned water tank temperature mainly refers to the water temperature of the water tank, that is, when the water tank water temperature Tw is less than TW1°C, it is controlled according to the first control mode; when the water tank water temperature Tw is greater than TW2°C (42°C), it is controlled according to the second control mode; when the water tank water temperature is 39°C ≤ Tw ≤ 42°C, the previous control mode is maintained. When the multi-split air conditioner is powered on for the first time, it is executed according to control mode 2, where the first control mode is a control mode in which hot water production is prioritized and the heating indoor unit is in standby mode; the second control mode is a control mode in which the heating indoor unit and hot water production are operated simultaneously.

[0088] Wherein, TW1°C may be 39°C and TW2°C may be 42°C, which are not specifically limited in this application.

[0089] Step S30: adjusting the opening of the first throttling element and / or the second throttling element according to the air conditioner control mode.

[0090] It is worth noting that, in the present application, the opening adjustments of the first throttling element and the second throttling element are independent and do not affect each other.

[0091] The present application obtains the water tank temperature of the hot water tank in the hydraulic module when the multi-split air conditioner has the demand for heating and hot water at the same time, determines the control mode of the multi-split air conditioner according to the water tank temperature, and then adjusts the opening of the first throttling element corresponding to the indoor heat exchanger or the second throttling element corresponding to the hydraulic module according to the control mode of the air conditioner, thereby adjusting the refrigerant flow ratio and the heating effect of the indoor heat exchanger or the hydraulic module, avoiding the technical problem of poor heating effect when the heating and hot water are turned on at the same time in the prior art multi-split air conditioner, and improving the heating effect of the multi-split air conditioner.

[0092] Refer to FIG4 , which is a flow chart of an embodiment of an air conditioner control method of the present application.

[0093] The step S30 includes:

[0094] Step S301: determining the opening change value of the second throttling element according to the middle temperature of the coil, the outlet temperature of the coil and the water temperature of the water tank.

[0095] It should be noted that when the opening of the second throttling element corresponding to the hot water tank is controlled, the second throttling element will be initialized to the initial opening and maintained for a certain period of time, and then the automatic control mode of the second throttling element will be entered. This is to stabilize the measured temperature and avoid frequent switching of control modes.

[0096] Furthermore, after the second throttling element has maintained its initial opening for a period of time, in order to prevent the compressor exhaust temperature from being too high and causing a significant impact on the water tank heating, the change in the opening value of the second throttling element is determined based on the coil middle temperature, the coil outlet temperature, and the water tank water temperature, including:

[0097] Obtaining the exhaust temperature of the compressor;

[0098] When the exhaust temperature is greater than an exhaust temperature threshold, determining a change in the opening of the second throttling element according to the exhaust temperature, the middle temperature of the coil, the coil outlet temperature, and the water temperature of the water tank;

[0099] When the exhaust temperature is less than or equal to the exhaust temperature threshold, the opening change value of the second throttling element is determined according to the middle temperature of the coil, the coil outlet temperature, and the water temperature of the water tank.

[0100] It can be understood that the exhaust temperature of the compressor refers to the temperature of the refrigerant output end of the compressor. If the exhaust temperature is too high and the opening of the second throttling element is small, it may cause the water tank temperature to rise rapidly, thereby affecting the normal use of the user.

[0101] In one embodiment, if the exhaust temperature is detected to be greater than a first temperature threshold value for a continuous preset first time period, the second throttling element is not allowed to be adjusted down; if the exhaust temperature is detected to be less than or equal to the first temperature threshold value for a continuous preset first time period, the second throttling element is allowed to be adjusted down; if the exhaust temperature is detected to be greater than a second temperature threshold value for a continuous preset first time period, the second throttling element immediately increases the preset opening, and then increases the preset opening at intervals of a certain time period, wherein the first temperature threshold value is less than the second temperature threshold value.

[0102] For example: if the exhaust temperature is detected to be greater than 95°C for 10 seconds, the second throttling element is not allowed to be adjusted down; if the exhaust temperature is detected to be less than or equal to 95°C for 10 seconds, the second throttling element is allowed to be adjusted down; if the exhaust temperature is detected to be greater than 100°C for 10 seconds, the second throttling element will immediately increase by 50B, and then increase by 50B every 10 seconds. The above values ​​are for illustration only and can be modified adaptively. This application does not impose any specific restrictions on this.

[0103] In addition, in the present application, when the hot water tank is in the hot water making mode, the opening range of the corresponding second throttling element is 120-480B, and the exhaust temperature threshold mentioned above can be set to 95°C.

[0104] Furthermore, if the exhaust temperature is less than or equal to the exhaust temperature threshold, in order to accurately adjust the opening of the second throttling element and thereby distribute the refrigerant ratio, the change in the opening of the second throttling element is determined based on the coil middle temperature, the coil outlet temperature, and the water temperature of the water tank, including:

[0105] determining an actual degree of subcooling based on the middle temperature of the coil and the outlet temperature of the coil;

[0106] Querying the target subcooling degree corresponding to the water temperature of the water tank;

[0107] An opening change value of the second throttling element is determined according to the target subcooling degree and the actual subcooling degree.

[0108] It is understandable that the target subcooling degree is negatively correlated with the water temperature of the water tank. Generally, the higher the water temperature of the water tank, the smaller the target subcooling degree. When querying the target subcooling degree corresponding to the water temperature of the water tank, you can refer to Table 1.

[0109] Table 1

[0110] Tank water temperature Tw Target subcooling (°C) Tw<20 Range: [8, 16], for example, 1220≤Tw<30 Range: [6, 12], for example, 730≤Tw<40 Range: [4, 10], for example, 540≤Tw<50 Range: [2, 8], for example, 450≤Tw Range: [0, 6], for example, 4

[0111] It should be noted that the actual subcooling refers to the difference between the coil middle temperature and the coil outlet temperature, and the opening change value of the second throttling element refers to the difference between the actual subcooling and the target subcooling.

[0112] Step S302: adjusting the opening of the second throttling element according to the opening change value.

[0113] In the present application, there are different ways to adjust the opening of the second throttling element according to the size of the opening change value. The adjustment of the opening of the second throttling element according to the opening change value includes:

[0114] When the opening change value is greater than a preset threshold, adjusting the opening of the second throttling element according to the opening change value and a preset first coefficient;

[0115] When the opening change value is less than or equal to a preset threshold, the opening of the second throttling element is adjusted according to the opening change value and a preset second coefficient, and the preset first coefficient is greater than the preset second coefficient.

[0116] In one embodiment, taking the preset threshold value as 0, the preset first coefficient as 3, and the preset second coefficient as 1 as an example, the adjustment of the second throttling original opening is specifically performed as follows: when the opening change value is greater than 0, the electronic expansion valve opening = the original opening + the opening change value * 3; when the opening change value is ≤0, the electronic expansion valve opening = the original opening + the opening change value * 1.

[0117] Furthermore, when adjusting the opening of the first throttling element corresponding to the indoor heat exchanger, there are two control modes. The step of adjusting the opening of the first throttling element according to the first opening control mode specifically includes:

[0118] Obtaining the outdoor ambient temperature of the area where the air conditioner outdoor unit is located;

[0119] Determining a target opening corresponding to the outdoor ambient temperature;

[0120] The opening of the first throttle element is adjusted according to the target opening.

[0121] It is understandable that when determining the target opening corresponding to the outdoor ambient temperature, reference may be made to Table 2.

[0122] Table 2

[0123] T4 ≥ 5°C A1, range [20, 80], for example 54B -5°C ≤ T4 < 5°C A2, range [20, 80], for example 50B -12°C ≤ T4 < -5°C A3, range [20, 80], for example 46B T4 < -12°C A4, range [20, 80], for example 40B

[0124] For example: if the water temperature of the hot water tank is 30°C, the opening adjustment of the first throttling element can be adjusted according to the first control method. At this time, if the outdoor ambient temperature of the area where the air-conditioning outdoor unit is located is 5°C, the opening of the first throttling element is 54B.

[0125] Furthermore, the step of adjusting the opening of the first throttling element according to the second opening control mode specifically includes:

[0126] Obtaining the middle temperature of the target indoor heat exchanger with heating demand and the average middle temperature of each target indoor heat exchanger;

[0127] Calculating a temperature difference between the middle temperature and the middle temperature mean;

[0128] Determine the opening change value to be adjusted corresponding to the temperature difference;

[0129] The opening of the first throttling element is adjusted according to the opening change value to be adjusted.

[0130] It should be noted that if the water temperature of the hot water tank is greater than or equal to 42°C, the opening adjustment of the first throttling element can be adjusted according to the second control method. At this time, the opening of the first throttling element is first initialized to a certain set initial opening and maintained for a certain period of time. After the initialization is completed, correction control is performed. The correction control logic is to calculate the temperature difference between the middle temperature of the coil of the target indoor heat exchanger with heating demand and the average temperature of the middle temperature of the coil of all indoor heat exchangers with heating demand, and then query the change value of the opening of the first throttling element corresponding to the temperature difference. The specific process of querying the change value of the opening of the first throttling element corresponding to the temperature difference can be referred to Table 3.

[0131] Table 3

[0132] Conditional opening change T2i-T2avg<-3℃a1, range [+8,+16], for example, +10-3≤T2i-T2avg<-1℃a2, range [+4,+10], for example, +6-1≤T2i-T2avg≤1℃a3, range [-4,+4], for example, 01<T2i-T2avg≤3℃a4, range [-8,0], for example, -4T2i-T2avg>3℃a5, range [-16,-4], for example, -8

[0133] T2i refers to the middle temperature of the coil of the target indoor heat exchanger with heating demand, and T2avg refers to the average middle temperature of the coil of all target indoor heat exchangers with heating demand.

[0134] This application determines different opening control methods according to the water tank temperature, thereby adjusting the opening of the first throttling element corresponding to the air-conditioning indoor unit and / or the second throttling element corresponding to the hydraulic module under different temperature scenarios, balancing the heating and hot water production capacity requirements under different demands, and improving the heating effect of the air-conditioning indoor unit and the hot water production effect of the hydraulic module.

[0135] Refer to FIG5 , which is a flow chart of an embodiment of an air conditioner control method of the present application.

[0136] In this application, the step S20 further includes:

[0137] Step S310: determining whether the pressure of the refrigerant circuit in the air conditioner is abnormal based on the middle temperature of the coil and the temperature of the water tank.

[0138] It should be noted that the judgment of whether the refrigerant circuit pressure in the multi-split air conditioner is abnormal can be based on the detection of the middle temperature of the coil being greater than 53°C for 1 consecutive minute, or when the multi-split air conditioner has both heating and hot water demands, after running for 20 minutes, if the difference between the middle temperature of the coil and the water temperature Tw in the water tank is less than 1°C for 5 consecutive minutes.

[0139] Step S320: If yes, the opening of the second throttling element is adjusted according to the middle temperature of the coil and / or the water tank temperature until it is detected that the difference between the middle temperature of the coil and the water tank temperature is greater than the preset first temperature threshold for a duration greater than the preset first duration, or the water tank temperature is greater than the set temperature of the hot water tank.

[0140] In one embodiment, if a pressure abnormality occurs in the multi-split air conditioner, it indicates that the multi-split air conditioner has a poor heating effect for at least one of heating or hot water production. Adjusting the opening of the second throttling element according to the middle temperature of the coil includes:

[0141] When the temperature in the middle of the coil is greater than or equal to a preset second temperature threshold, the opening change value is screened to obtain a target opening change value, and the target opening change value is an opening change value greater than or equal to the preset threshold; the opening of the second throttling element is adjusted according to the target opening change value.

[0142] It is understandable that the preset second temperature threshold may be 53° C., and the process of screening the opening change values ​​to obtain the target opening change value may be to eliminate the opening change values ​​less than 0, that is, not allowing the second throttling element to be adjusted down.

[0143] In addition, when the multi-split air conditioner has simultaneous heating and hot water needs, after running for 20 minutes, if the difference between the coil middle temperature and the water tank water temperature Tw is detected to be less than 1°C for 5 consecutive minutes, and the electric auxiliary heating device at the corresponding point of the hot water tank is turned on for electric heating, the opening of the second throttling element can be directly adjusted to 55B.

[0144] In specific implementation, if the multi-split air conditioner enters an abnormal pressure state and is controlled by the corresponding control strategy, and any of the following conditions is met: the difference between the middle temperature of the water tank coil and the water temperature Tw in the water tank is detected to be greater than 4°C for 10 consecutive seconds; when the water temperature Tw in the water tank is greater than or equal to the set temperature Tws of the water tank, this control can be exited.

[0145] The present application determines whether there is any pressure abnormality in the refrigerant in the multi-split air conditioner. If so, the opening of the second throttling element is adjusted according to the control strategy corresponding to the detected pressure abnormality to avoid affecting the heating or hot water production effect, thereby improving the user experience.

[0146] In addition, an embodiment of the present application further provides a storage medium on which an air conditioner control program is stored. When the air conditioner control program is executed by a processor, the steps of the air conditioner control method described above are implemented.

[0147] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0148] 6 , which is a structural block diagram of an embodiment of an air conditioner control device of the present application.

[0149] As shown in FIG6 , the air conditioner control device proposed in the embodiment of the present application includes:

[0150] The acquisition module 10 is used to acquire the water tank temperature of the hydraulic module when the air conditioner has both heating and hot water demands.

[0151] It is worth noting that the air conditioner in this application refers to a multi-split air conditioner. Referring to Figure 3, a multi-split air conditioner is an external unit connected to multiple internal units, which can realize the function of adjusting parameters such as air temperature, humidity, cleanliness and air flow rate in multiple rooms at the same time, including but not limited to cooling, heating and fresh air circulation modes.

[0152] It should be noted that the multi-split air conditioner in the present application includes an outdoor air conditioner, an indoor air conditioner and a hydraulic module. The outdoor air conditioner is respectively connected to each indoor air conditioner and the hydraulic module. The outdoor air conditioner includes: a compressor, an outdoor heat exchanger and at least two reversing devices. The indoor air conditioner includes at least one indoor heat exchanger. A hot water tank is provided at the end of the hydraulic module. Each reversing device is connected to the compressor and is mainly used to control the flow direction of the refrigerant in the multi-split air conditioner. The reversing device can be a four-way valve or a three-way valve. This application does not impose specific restrictions on this.

[0153] In addition, throttling elements are provided between the air-conditioning outdoor unit and each air-conditioning indoor unit and the hydraulic module. The throttling elements in this application include a first throttling element corresponding to the indoor heat exchanger and a second throttling element corresponding to the hot water tank, wherein the throttling elements include an electronic expansion valve and a capillary tube, etc. In this application, the electronic expansion valve is mainly used as an example for explanation, wherein the throttling elements between the air-conditioning outdoor unit and each air-conditioning indoor unit and the hydraulic module may include a main electronic expansion valve, and also include a branch electronic expansion valve corresponding to each air-conditioning indoor unit or hydraulic module. This application does not impose specific restrictions on this.

[0154] It can be understood that when the indoor heating mechanism of the multi-split air conditioner is in operation, the refrigerant is compressed by the compressor to obtain high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant is transported to the indoor heat exchanger through the four-way valve for condensation and heat dissipation. After the indoor heat exchanger exchanges heat with the indoor environment, medium-temperature and high-pressure refrigerant is obtained, and then through the throttling elements such as the electronic expansion valve and the main capillary mentioned above, low-pressure and medium-temperature refrigerant is obtained, which is transported to the outdoor heat exchanger for evaporation to obtain low-temperature and low-pressure refrigerant, and finally returns to the compressor through the four-way valve to complete a single heating process.

[0155] When there is a demand for hot water in a multi-split air conditioner, the refrigerant is compressed by the compressor to obtain high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant is transported to the hot water tank through a four-way valve. The hot water tank acts as a condenser. After heat exchange with the water channel in the hot water tank, the outlet water temperature is made greater than the inlet water temperature, thereby achieving heating. The refrigerant flows through the water channel of the hot water tank to obtain medium-temperature and high-pressure refrigerant, and then passes through the throttling elements such as the electronic expansion valve and the main line capillary mentioned above to obtain low-pressure and medium-temperature refrigerant, which is transported to the outdoor heat exchanger for evaporation to obtain low-temperature and low-pressure refrigerant, and finally flows back to the compressor through the four-way valve to complete a single heating process.

[0156] It should be understood that the water tank temperature includes but is not limited to the middle temperature of the coil, the coil outlet temperature and the water temperature in the water tank, wherein the value of the water tank temperature can be the average value between the water temperature at the top of the water tank and the water temperature at the bottom of the water tank. The middle temperature of the water tank coil refers to the refrigerant saturation temperature corresponding to the compressor exhaust pressure. In this application, the refrigerant saturation temperature is related to factors such as the refrigerant type and refrigerant pressure. Its main functions are temperature control, heat exchange and improving energy efficiency. Taking into account that there is pressure loss when the refrigerant passes through various heat exchange devices, and there is basically no pressure loss when the refrigerant is transmitted in the pipeline, this application uses the middle temperature of the coil of the hot water tank directly connected to the refrigerant output end of the compressor as the refrigerant saturation temperature corresponding to the exhaust pressure.

[0157] The determination module 20 is configured to determine the air conditioner control mode corresponding to the water tank temperature.

[0158] In the present application, different control logics exist for the control methods of different throttling elements. For example, there are two control methods for the control method of the first throttling element corresponding to the indoor heat exchanger. One is to adjust the opening of the first throttling element according to the opening corresponding to the outdoor ambient temperature; the other is to determine the temperature difference based on the middle temperature of the indoor heat exchanger with heating demand and the average of the middle temperatures of each indoor heat exchanger with capacity demand, and adjust the opening of the first throttling element according to the opening corresponding to the temperature difference.

[0159] As for the control method of the second throttling element corresponding to the hot water tank, the control method of the second throttling element is determined to be automatic control or abnormal control according to the middle temperature of the hot water tank coil, the water temperature of the water tank and the coil outlet temperature. This application does not impose any specific restrictions on this.

[0160] Furthermore, the determining of the air conditioner control mode corresponding to the water tank temperature includes:

[0161] When the water tank temperature is within a first temperature range, running a first opening control mode to adjust the opening of the first throttling element;

[0162] When the water tank temperature is in a second temperature range, the last operating opening control mode is operated, and the minimum value of the second temperature range is greater than the maximum value of the first temperature range;

[0163] When the water tank temperature is in a third temperature range, the second opening control mode is run to adjust the opening of the first throttling element, and the minimum value of the third temperature range is greater than the maximum value of the second temperature range.

[0164] In one embodiment, the above-mentioned water tank temperature mainly refers to the water temperature of the water tank, that is, when the water tank water temperature Tw is less than TW1°C, it is controlled according to the first control mode; when the water tank water temperature Tw is greater than TW2°C (42°C), it is controlled according to the second control mode; when the water tank water temperature is 39°C ≤ Tw ≤ 42°C, the previous control mode is maintained. When the multi-split air conditioner is powered on for the first time, it is executed according to control mode 2, where the first control mode is a control mode in which hot water production is prioritized and the heating indoor unit is in standby mode; the second control mode is a control mode in which the heating indoor unit and hot water production are operated simultaneously.

[0165] Wherein, TW1°C may be 39°C and TW2°C may be 42°C, which are not specifically limited in this application.

[0166] The adjustment module 30 is configured to adjust the opening of the first throttling element and / or the second throttling element according to the air conditioner control mode.

[0167] It is worth noting that, in the present application, the opening adjustments of the first throttling element and the second throttling element are independent and do not affect each other.

[0168] In one embodiment, the adjustment module 30 is further used to determine the opening change value of the second throttling element based on the middle temperature of the coil, the coil outlet temperature and the water temperature of the water tank; and adjust the opening of the second throttling element according to the opening change value.

[0169] In one embodiment, the adjustment module 30 is further used to obtain the exhaust temperature of the compressor; when the exhaust temperature is greater than an exhaust temperature threshold, the opening change value of the second throttling element is determined based on the exhaust temperature, the middle temperature of the coil, the coil outlet temperature, and the water temperature of the water tank; when the exhaust temperature is less than or equal to the exhaust temperature threshold, the opening change value of the second throttling element is determined based on the middle temperature of the coil, the coil outlet temperature, and the water temperature of the water tank.

[0170] In one embodiment, the adjustment module 30 is further used to determine the actual subcooling degree based on the middle temperature of the coil and the coil outlet temperature; query the target subcooling degree corresponding to the water temperature of the water tank; and determine the opening change value of the second throttling element based on the target subcooling degree and the actual subcooling degree.

[0171] In one embodiment, the adjustment module 30 is further used to adjust the opening of the second throttling element according to the opening change value and a preset first coefficient when the opening change value is greater than a preset threshold; and to adjust the opening of the second throttling element according to the opening change value and a preset second coefficient when the opening change value is less than or equal to the preset threshold, and the preset first coefficient is greater than the preset second coefficient.

[0172] In one embodiment, the adjustment module 30 is further used to determine whether the pressure of the refrigerant circuit in the air conditioner is abnormal based on the middle temperature of the coil and the water tank temperature; if so, the opening of the second throttling element is adjusted according to the middle temperature of the coil and / or the water tank temperature until it is detected that the difference between the middle temperature of the coil and the water tank temperature is greater than the preset first temperature threshold for a duration greater than the preset first duration, or the water tank temperature is greater than the set temperature of the hot water tank.

[0173] In one embodiment, the adjustment module 30 is further used to filter the opening change value when the temperature in the middle of the coil is greater than or equal to a preset second temperature threshold to obtain a target opening change value, wherein the target opening change value is an opening change value greater than or equal to the preset threshold; and adjust the opening of the second throttling element according to the target opening change value.

[0174] In one embodiment, the adjustment module 30 is further configured to adjust the opening of the second throttling element according to a preset opening when the difference between the water tank coil temperature and the water tank temperature is less than a preset second temperature threshold and the electric auxiliary heating device turns on electric heating.

[0175] In one embodiment, the adjustment module 30 is further configured to obtain the outdoor ambient temperature of the area where the air conditioner outdoor unit is located; determine a target opening corresponding to the outdoor ambient temperature; and adjust the opening of the first throttling element according to the target opening.

[0176] In one embodiment, the adjustment module 30 is further used to obtain the middle temperature of the target indoor heat exchanger with heating demand and the average middle temperature corresponding to each target indoor heat exchanger; calculate the temperature difference between the middle temperature and the average middle temperature; determine the opening change value to be adjusted corresponding to the temperature difference; and adjust the opening of the first throttling element according to the opening change value to be adjusted.

[0177] In one embodiment, the determination module 20 is further used to run a first opening control mode to adjust the opening of the first throttling element when the water tank temperature is in a first temperature range; run the opening control mode that was run last time when the water tank temperature is in a second temperature range, and the minimum value of the second temperature range is greater than the maximum value of the first temperature range; and run a second opening control mode to adjust the opening of the first throttling element when the water tank temperature is in a third temperature range, and the minimum value of the third temperature range is greater than the maximum value of the second temperature range.

[0178] The present application obtains the water tank temperature of the hot water tank in the hydraulic module when the multi-split air conditioner has the demand for heating and hot water at the same time, determines the control mode of the multi-split air conditioner according to the water tank temperature, and then adjusts the opening of the first throttling element corresponding to the indoor heat exchanger or the second throttling element corresponding to the hydraulic module according to the control mode of the air conditioner, thereby adjusting the refrigerant flow ratio and the heating effect of the indoor heat exchanger or the hydraulic module, avoiding the technical problem of poor heating effect when the heating and hot water are turned on at the same time in the prior art multi-split air conditioner, and improving the heating effect of the multi-split air conditioner.

[0179] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are shown in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence in the order indicated by the arrows. Unless clearly stated herein, the execution of these steps is not strictly limited in order, and they can be performed in other orders. Moreover, at least a portion of the steps in the figure may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with at least a portion of other steps or sub-steps or stages of other steps.

[0180] It should be understood that the above is only an example and does not constitute any limitation to the technical solution of the present application. In specific applications, technicians in this field can make settings as needed, and the present application does not impose any restrictions on this.

[0181] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this application. In actual applications, technicians in this field can select part or all of it according to actual needs to achieve the purpose of the present application scheme, and no restrictions are imposed here.

[0182] In addition, for technical details not fully described in this application, please refer to the air conditioner control method provided in any embodiment of this application, and will not be repeated here.

[0183] In addition, it should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0184] The serial numbers of the above embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0185] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, or the part that contributes to the existing technology, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, a magnetic disk, or an optical disk) and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of this application.

[0186] The above are merely optional embodiments of the present application and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A method for controlling an air conditioner, wherein: The air conditioner control method is applied to a multi-split air conditioner, the multi-split air conditioner comprises: an air conditioner outdoor unit, a plurality of air conditioner indoor units and a hydraulic module, the air conditioner outdoor unit is respectively connected to each air conditioner indoor unit and the hydraulic module, the air conditioner indoor unit comprises: an indoor heat exchanger and a first throttling element corresponding to the indoor heat exchanger, the hydraulic module comprises a hot water tank and a second throttling element corresponding to the hot water tank; The air conditioner control method comprises: When the air conditioner has both heating and hot water demands, obtaining the water tank temperature of the hot water tank; Determine the air conditioner control mode corresponding to the water tank temperature; The opening degree of the first throttling element and / or the second throttling element is adjusted according to the air conditioner control mode.

2. The air conditioner control method according to claim 1, wherein: The water tank temperature includes: the middle temperature of the coil, the coil outlet temperature and the water temperature of the water tank; The opening of the second throttling element is adjusted, comprising: Determining the opening change value of the second throttling element according to the middle temperature of the coil, the outlet temperature of the coil and the water temperature of the water tank; The opening degree of the second throttling element is adjusted according to the opening degree change value.

3. The air conditioner control method according to claim 2, wherein: The air conditioner outdoor unit also includes a compressor; The step of determining the opening change value of the second throttling element according to the middle temperature of the coil, the outlet temperature of the coil and the water temperature of the water tank comprises: Acquiring the exhaust temperature of the compressor; When the exhaust temperature is greater than an exhaust temperature threshold, determining the opening change value of the second throttling element according to the exhaust temperature, the middle temperature of the coil, the coil outlet temperature and the water temperature of the water tank; When the exhaust temperature is less than or equal to the exhaust temperature threshold, the opening change value of the second throttling element is determined according to the middle temperature of the coil, the coil outlet temperature and the water temperature of the water tank.

4. The air conditioner control method according to claim 3, wherein: The step of determining the opening change value of the second throttling element according to the middle temperature of the coil, the outlet temperature of the coil and the water temperature of the water tank comprises: Determine the actual degree of subcooling according to the middle temperature of the coil and the outlet temperature of the coil; Querying the target subcooling degree corresponding to the water temperature of the water tank; The opening change value of the second throttling element is determined according to the target subcooling degree and the actual subcooling degree.

5. The air conditioner control method according to claim 2, wherein: The step of adjusting the opening of the second throttling element according to the opening change value includes: When the opening change value is greater than a preset threshold, adjusting the opening of the second throttling element according to the opening change value and a preset first coefficient; When the opening change value is less than or equal to a preset threshold, the opening of the second throttling element is adjusted according to the opening change value and a preset second coefficient, and the preset first coefficient is greater than the preset second coefficient.

6. The air conditioner control method according to claim 2, wherein: The air conditioner control method further includes: judging whether the pressure of the refrigerant circuit in the air conditioner is abnormal according to the middle temperature of the coil and the temperature of the water tank; When there is a pressure abnormality in the refrigerant circuit of the air conditioner, the opening of the second throttling element is adjusted according to the middle temperature of the coil and / or the water tank temperature until it is detected that the difference between the middle temperature of the coil and the water tank temperature is greater than the preset first temperature threshold for a duration greater than the preset first duration, or the water tank temperature is greater than the set temperature of the hot water tank.

7. The air conditioner control method according to claim 6, wherein: The opening of the second throttling element is adjusted according to the middle temperature of the coil, including: When the temperature in the middle of the coil is greater than or equal to a preset second temperature threshold, the opening change value is screened to obtain a target opening change value, wherein the target opening change value is an opening change value greater than or equal to a preset threshold; The opening of the second throttling element is adjusted according to the target opening change value.

8. The air conditioner control method according to claim 6, wherein: The air conditioner indoor unit also includes an electric auxiliary heating device corresponding to the hot water tank; The opening of the second throttling element is adjusted according to the middle temperature of the coil and the temperature of the water tank, and further includes: When the difference between the water tank coil temperature and the water tank temperature is less than a preset second temperature threshold and the electric auxiliary heating device turns on electric heating, the opening of the second throttling element is adjusted according to a preset opening.

9. The air conditioner control method according to claim 1, wherein: The air conditioner control mode includes a first opening control mode; Adjusting the opening of the first throttling element according to the first opening control mode includes: Obtaining the outdoor ambient temperature of the area where the air conditioner outdoor unit is located; Determining a target opening corresponding to the outdoor ambient temperature; The opening degree of the first throttle element is adjusted according to the target opening degree.

10. The air conditioner control method according to claim 1, wherein: The air conditioner control mode includes a second opening control mode; Adjusting the opening of the first throttling element according to the second opening control mode includes: Obtaining the middle temperature of the target indoor heat exchanger with heating demand and the average value of the middle temperature corresponding to each target indoor heat exchanger; Calculating a temperature difference between the middle temperature and the middle temperature mean; Determine the opening change value to be adjusted corresponding to the temperature difference; The opening of the first throttling element is adjusted according to the opening change value to be adjusted.

11. The air conditioner control method according to any one of claims 1 to 10, wherein: The step of determining the air conditioner control mode corresponding to the water tank temperature includes: When the water tank temperature is in a first temperature range, running a first opening control mode to adjust the opening of the first throttling element; When the water tank temperature is in a second temperature range, the last operating opening control mode is operated, and the minimum value of the second temperature range is greater than the maximum value of the first temperature range; When the water tank temperature is in a third temperature range, the second opening control mode is operated to adjust the opening of the first throttling element, and the minimum value of the third temperature range is greater than the maximum value of the second temperature range.

12. An air conditioner control device, wherein: The air conditioner control device comprises: An acquisition module, used for acquiring the water tank temperature of the hot water tank when the air conditioner has both heating and hot water demands; A determination module, used to determine the air conditioner control mode corresponding to the water tank temperature; An adjustment module is used to adjust the opening of the first throttling element and / or the second throttling element according to the air conditioner control mode.

13. A multi-split air conditioner, wherein: The multi-split air conditioner includes: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program is configured to implement the air conditioner control method according to any one of claims 1 to 11.

14. A storage medium, wherein: The storage medium stores an air conditioner control program, and when the air conditioner control program is executed by the processor, the air conditioner control method according to any one of claims 1 to 11 is implemented.

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