Air conditioner control method, device and equipment and storage medium

Abstract

The invention discloses an air conditioner control method, device and equipment and a storage medium, and belongs to the technical field of air conditioners. When the current operation mode is the refrigeration mode, the current outdoor environment temperature and the length of the connecting pipe are obtained; according to the current outdoor environment temperature and the length, the target superheat degree of an outlet of a heat exchanger of the indoor unit is determined; by means of the mode, the superheat degree of the evaporator can be adaptively adjusted according to different conditions on the basis of the connecting pipes of different lengths and the outdoor environment temperature, and the multi-split air conditioning system can be prevented from being at the high temperature; the problem that the system temperature is too high due to invalid overheating in the long connecting pipe environment is solved, and the reliability and the operation efficiency of the air conditioning system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner control method, device, equipment and storage medium. Background Art

[0002] Since the multi-split system can be equipped with multiple indoor units, each indoor unit is equipped with an independent throttling component. The flow rate is controlled by the throttling component of the indoor unit for cooling, and the flow rate is controlled by the throttling component of the outdoor unit for heating. The control method of the throttling component of the indoor unit is usually adjusted according to the fixed superheat at the outlet of the indoor unit heat exchanger, such as 1~2°. However, the current technical solution is installed in a long pipe. When operating in a high-temperature environment, the suction air will be overheated due to heat exchange with the high-temperature environment, resulting in a high exhaust temperature of the system, which reduces the system reliability and operating efficiency.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide an air conditioner control method, device, equipment and storage medium, aiming to solve the technical problem that in the prior art, when a fixed superheat adjustment method is adopted for heat exchange operation in a high temperature environment, the intake air will be overheated, resulting in a high exhaust temperature of the system, thereby reducing the reliability and operating efficiency of the system.

[0005] To achieve the above object, the present invention provides an air conditioner control method, wherein the air conditioner comprises an indoor unit and an outdoor unit, a connecting pipe is provided between the indoor unit and the outdoor unit, and a throttling component is provided in the indoor unit. The air conditioner control method comprises:

[0006] When the current operating mode is a cooling mode, obtaining the current outdoor ambient temperature and the length of the connecting pipe;

[0007] determining a target superheat degree of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length; and

[0008] The throttling component is controlled according to the target superheat.

[0009] Optionally, determining a target superheat degree of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length includes:

[0010] Determining whether to turn on overheat protection according to the current outdoor ambient temperature and the length; and

[0011] A target superheat degree of an outlet of a heat exchanger of the indoor unit is determined based on the determination result.

[0012] Optionally, judging whether to turn on overheat protection according to the current outdoor ambient temperature and the length includes:

[0013] When the current ambient temperature is greater than a first temperature threshold and the length is greater than a preset length, determining that overheat protection needs to be turned on; and

[0014] When the current ambient temperature is less than or equal to the first temperature threshold or the length is less than or equal to a preset length, it is determined that overheat protection does not need to be turned on.

[0015] Optionally, determining a target superheat degree of the heat exchanger outlet of the indoor unit based on the judgment result includes:

[0016] If the overheat protection does not need to be turned on, the initial superheat degree is used as the target superheat degree at the outlet of the heat exchanger of the indoor unit.

[0017] Optionally, determining the target superheat degree of the heat exchanger outlet of the indoor unit based on the judgment result further includes:

[0018] If overheat protection needs to be turned on, then the duration that the current ambient temperature is greater than the first temperature threshold and the length is greater than the preset length is recorded; and

[0019] When the duration reaches a first preset duration, the first superheat degree is used as a target superheat degree at an outlet of the heat exchanger of the indoor unit.

[0020] Optionally, the air conditioner further comprises a compressor, an exhaust pipe of the compressor is provided with a temperature sensor, and when the duration reaches a preset duration, the first superheat is used as a target superheat of the heat exchanger outlet of the indoor unit, further comprising:

[0021] acquiring the exhaust temperature collected by the temperature sensor during operation according to the first superheat degree;

[0022] Recording the number of times the exhaust temperature exceeds the exhaust temperature threshold and the corresponding duration; and

[0023] When the number reaches a preset number and the duration reaches a second preset duration, the target superheat degree is adjusted from the first superheat degree to a second superheat degree, and a threshold range of the second superheat degree is greater than a threshold range of the first superheat degree.

[0024] Optionally, the air conditioner control method further includes:

[0025] Acquiring the opening state of the exhaust pipe; and

[0026] An exhaust temperature threshold is determined according to the opening state.

[0027] In addition, to achieve the above-mentioned purpose, the present invention further proposes an air conditioner control device, the air conditioner includes an indoor unit and an outdoor unit, a connecting pipe is provided between the indoor unit and the outdoor unit, a throttling component is provided in the indoor unit, and the air conditioner control device includes:

[0028] an acquisition module, used for acquiring the current outdoor ambient temperature and the length of the connecting pipe when the current operating mode is a cooling mode;

[0029] a processing module, configured to determine a target superheat degree of an outlet of a heat exchanger of the indoor unit according to the current outdoor ambient temperature and the length; and

[0030] A control module is used to control the throttling component according to the target superheat.

[0031] In addition, to achieve the above-mentioned purpose, the present invention also proposes an air conditioner control device, which includes: a memory, a processor, and an air conditioner control program stored in the memory and running on the processor, and the air conditioner control program is configured to implement the air conditioner control method described above.

[0032] In addition, to achieve the above-mentioned purpose, the present invention further proposes a storage medium, on which an air conditioner control program is stored, and when the air conditioner control program is executed by a processor, the air conditioner control method as described above is implemented.

[0033] The present invention obtains the current outdoor ambient temperature and the length of the connecting pipe when the current operating mode is the cooling mode; determines the target superheat of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length; and controls the throttling component according to the target superheat. Through the above method, the superheat of the evaporator can be adaptively adjusted according to different situations based on connecting pipes of different lengths and outdoor ambient temperatures, which can prevent the problem of high system temperature caused by invalid overheating in a high temperature and long connecting pipe environment of the multi-split system, thereby improving the reliability and operation efficiency of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a structural diagram of an air conditioner control device in a hardware operating environment involved in an embodiment of the present invention;

[0035] Figure 2 A schematic diagram of a flow chart of a first embodiment of an air conditioner control method of the present invention;

[0036] Figure 3 A schematic diagram of the structure of an air conditioner in an embodiment of an air conditioner control method of the present invention;

[0037] Figure 4A schematic diagram of a flow chart of a second embodiment of an air conditioner control method of the present invention;

[0038] Figure 5 A schematic flow chart of a third embodiment of an air conditioner control method according to the present invention;

[0039] Figure 6 FIG. 1 is a structural block diagram of a first embodiment of an air conditioner control device according to the present invention.

[0040] Description of Reference Numerals

[0041] 1 Gas 8 Throttle valve 2 Exhaust port 9 Solenoid valve 3 compressor 10 Plate Heat Exchanger 4 Spray enthalpy 11 Connecting pipe 5 First temperature sensor 12 Second temperature sensor 6 Four-way valve 13 The third temperature sensor 7 Condenser

[0042] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0043] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0044] Reference Figure 1 , Figure 1 The figure is a schematic diagram of the structure of an air conditioner control device in the hardware operating environment involved in the embodiment of the present invention.

[0045] like Figure 1 As shown, the air conditioner control device 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 a memory 1005. Among them, the communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wireless-Fidelity, Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) memory, or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0046] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the air conditioner control device, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0047] like Figure 1 As shown, 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.

[0048] exist Figure 1 In the air conditioner control device shown, 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 air conditioner control device of the present invention can be set in the air conditioner control device, and the air conditioner control device 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 invention.

[0049] The embodiment of the present invention provides an air conditioner control method, referring to Figure 2 , Figure 2 FIG. 1 is a flow chart of a first embodiment of an air conditioner control method according to the present invention.

[0050] In this embodiment, the air conditioner control method includes the following steps:

[0051] Step S10: when the current operation mode is the cooling mode, obtaining the current outdoor ambient temperature and the length of the connecting pipe.

[0052] In this embodiment, the execution subject of this embodiment may be the air conditioner control device, which has functions such as data processing, data communication and program running, and the air conditioner control device may be a controller inside the air conditioner. Of course, it may also be other devices with similar functions, and this implementation condition does not limit this. For the convenience of explanation, this implementation is described by taking the air conditioner control device as an example.

[0053] It should be noted that since the multi-split system can be equipped with multiple indoor units, each indoor unit is equipped with an independent throttling component. The flow rate is controlled by the throttling component of the indoor unit for cooling, and the flow rate is controlled by the throttling component of the outdoor unit for heating. The control method of the throttling component of the indoor unit is usually adjusted according to the fixed superheat at the outlet of the indoor unit heat exchanger, such as 1 to 2°. However, the current technical solution is installed in a long connecting pipe. When operating in a high-temperature environment, the suction air will be overheated due to heat exchange with the high-temperature environment, resulting in a high exhaust temperature of the system, which reduces the system reliability and operating efficiency.

[0054] In a specific implementation, this embodiment first proposes an air conditioner structure, the structure of the air conditioner is as follows Figure 3 See Figure 3The air conditioner in this embodiment includes an indoor unit side and an outdoor unit side. The outdoor unit side is composed of a gas distributor 1, a compressor 3, a first temperature sensor 5, a four-way valve 6, a condenser 7, a throttle valve 8, a solenoid valve 9, and a plate heat exchanger 10. The compressor 3 also includes an exhaust port 2 and an enthalpy spray port 4. The first temperature sensor 5 is arranged at the exhaust pipe of the compressor and can be used to monitor the exhaust temperature of the compressor 3 in real time. The outdoor unit side is connected to the indoor unit side through a connecting pipe 11. The evaporator of the indoor unit is also provided with a second temperature sensor 12 and a third temperature sensor 13. The second temperature sensor 12 is a middle temperature sensor of the evaporator. The second temperature sensor 12 can be used to monitor the middle temperature of the evaporator in real time. The third temperature sensor 13 is arranged at the outlet of the evaporator. The third temperature sensor 13 can be used to monitor the outlet temperature of the evaporator in real time. Each indoor unit is equipped with a wire controller, and the length of the connecting pipe can be input when the wire controller is installed. It should be further explained that each indoor unit is equipped with an independent throttling component. The flow rate of cooling is controlled by the indoor unit throttling component, and the flow rate of heating is controlled by the outdoor unit throttling component. The control of the indoor unit throttling component is based on the superheat of the indoor heat exchanger outlet. However, at present, the throttling component is usually controlled according to a fixed superheat of 1 to 2. This fixed superheat method will be installed in a long pipe. When running in a high-temperature environment, the suction air will be overheated due to heat exchange with the high-temperature environment, causing the system exhaust temperature to be high. In this embodiment, the superheat will be adjusted in real time based on different situations, so that the superheat of the evaporator outlet is no longer a fixed value, but a dynamic value based on changes in the situation. It can effectively cope with the heat exchange situation in a high-temperature environment, thereby improving the stability of the entire air-conditioning system.

[0055] It should be noted that the outdoor temperature is high in the cooling mode. The multi-connected adaptive overheating prevention air conditioning system in this embodiment is aimed at the heat exchange of high-temperature environment in the cooling mode. Therefore, in this embodiment, the current operation mode of the air conditioner needs to be detected first. Specifically, after obtaining the current operation mode of the air conditioner, it is determined whether the current operation mode is the cooling mode. If it is the cooling mode, the current outdoor ambient temperature and the length of the connecting pipe are further obtained, wherein the current outdoor ambient temperature can be obtained by the ambient temperature sensor set on the outdoor unit side, and the length of the connecting pipe can be pre-entered in the wire controller of each indoor unit.

[0056] Step S20: determining a target superheat degree of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length.

[0057] In a specific implementation, after obtaining the current outdoor ambient temperature and the length of the connecting pipe, the target superheat can be determined according to the current outdoor ambient temperature and the length of the connecting pipe in this embodiment. Specifically, the target superheat can be determined according to the size relationship between the current outdoor ambient temperature and the length of the connecting pipe and the corresponding thresholds. For example, when the current outdoor ambient temperature does not exceed the temperature threshold or the length of the connecting pipe does not exceed the preset length, the target superheat can be set to the initial superheat, and the initial superheat can be 1 to 2°C. For example, when the current outdoor ambient temperature exceeds the temperature threshold and the length of the connecting pipe exceeds the preset length, the target superheat can be set to the first superheat, and the first superheat can be -1 to 0°C. The above superheat is only for example. In actual application, it can be adjusted accordingly according to the situation to avoid invalid overheating of the air conditioner. This is not limited in this embodiment.

[0058] Step S30: Controlling the throttling component according to the target superheat.

[0059] In a specific implementation, the control of the indoor unit throttling component is based on the superheat at the outlet of the indoor heat exchanger. Therefore, after obtaining the corresponding target superheat at the outlet of the evaporator, the throttling component can be controlled based on the target superheat in this embodiment. The control of the indoor unit throttling component is based on the superheat at the outlet of the indoor heat exchanger. Specifically, the opening of the throttling component can be adjusted based on the corresponding relationship between the superheat and the opening of the throttling component. The throttling component can also be controlled accordingly in other ways, which is not limited in this embodiment.

[0060] This embodiment obtains the current outdoor ambient temperature and the length of the connecting pipe when the current operating mode is the cooling mode; determines the target superheat of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length; and controls the throttling component according to the target superheat. Through the above method, the superheat of the evaporator can be adaptively adjusted according to different situations based on connecting pipes of different lengths and outdoor ambient temperatures, which can prevent the problem of high system temperature caused by invalid overheating in a high temperature and long connecting pipe environment of the multi-split system, thereby improving the reliability and operation efficiency of the air-conditioning system.

[0061] refer to Figure 4 , Figure 4 FIG. 4 is a flow chart of a second embodiment of an air conditioner control method according to the present invention.

[0062] Based on the first embodiment, in the air conditioner control method of this embodiment, step S20 specifically includes:

[0063] Step S201: judging whether it is necessary to turn on overheat protection according to the current outdoor ambient temperature and the length.

[0064] In a specific implementation, when determining the target superheat degree according to the current outdoor ambient temperature and the length of the connecting pipe, it is necessary to first determine whether to turn on the overheat protection function according to the current outdoor ambient temperature and the length of the connecting pipe.

[0065] In a specific implementation, in this embodiment, by comparing the current outdoor ambient temperature with the first temperature threshold, and comparing the length of the connecting pipe with the preset length, it is determined whether the overheat protection function needs to be turned on based on the comparison result.

[0066] Specifically, if the current outdoor ambient temperature is greater than the first temperature threshold, and the length of the connecting pipe is greater than the preset length, it is determined that the overheat protection function needs to be turned on. Conversely, if the current outdoor ambient temperature is less than or equal to the first temperature threshold, or the length of the connecting pipe is less than or equal to the preset length, it is determined that the overheat protection function does not need to be turned on at this time.

[0067] In an optional embodiment, the first temperature threshold can be set to 35°C, and the preset length can be set to 50m. When the outdoor ambient temperature is greater than 35°C and the length of the connecting pipe is greater than 50m, it is determined that the overheat protection function needs to be turned on, otherwise it is determined that the overheat protection function does not need to be turned on. The above-mentioned first temperature threshold and the first preset length are set for example only, and can be adjusted accordingly according to actual conditions, which is not limited in this embodiment.

[0068] Step S202: determining a target superheat degree of the heat exchanger outlet of the indoor unit based on the judgment result.

[0069] In a specific implementation, if it is determined that the overheat protection does not need to be turned on, in this embodiment, the initial superheat degree is used as the target superheat degree of the heat exchanger outlet of the indoor unit, and the initial superheat degree can be set to 1-2°C.

[0070] Furthermore, if it is determined that there is no need to turn on the overheat protection, the duration of satisfying the overheat protection condition will be further detected in this embodiment. Specifically, the duration during which the current ambient temperature is greater than the first temperature threshold and the length is greater than the preset length is recorded, and when the duration reaches the first preset length, the first superheat degree is used as the target superheat degree of the heat exchanger outlet of the indoor unit.

[0071] In an optional embodiment, the first preset time can be set to 10 minutes. Assuming that the first temperature threshold is 35°C and the preset length is 50m, when the outdoor ambient temperature is greater than 35°C and the length of the connecting pipe is greater than 50m, and the duration exceeds 10 minutes, the first superheat is used as the target superheat of the heat exchanger outlet of the indoor unit. The first superheat can be set to -1~0°C, that is, the throttling component of the indoor unit is controlled at -1~0°C.

[0072] In this embodiment, whether it is necessary to turn on the anti-overheating function is determined according to the current outdoor ambient temperature and the length; the target superheat degree of the heat exchanger outlet of the indoor unit is determined based on the judgment result; when the current ambient temperature is greater than the first temperature threshold and the length is greater than the preset length, it is determined that the anti-overheating function needs to be turned on; and when the current ambient temperature is less than or equal to the first temperature threshold or the length is less than or equal to the preset length, it is determined that the anti-overheating function does not need to be turned on. If the anti-overheating function does not need to be turned on, the initial superheat degree is used as the target superheat degree of the heat exchanger outlet of the indoor unit; if the anti-overheating function needs to be turned on, the duration of the current ambient temperature being greater than the first temperature threshold and the length being greater than the preset length is recorded; and when the duration reaches the first preset duration, the first superheat degree is used as the target superheat degree of the heat exchanger outlet of the indoor unit. The anti-overheating function is judged according to the outdoor ambient temperature and the length of the connecting pipe, and different superheat degrees are set according to the anti-overheating requirements, so as to prevent the multi-split system from having a high system temperature due to invalid overheating in a high temperature and long connecting pipe environment, thereby improving the stability of the air-conditioning system.

[0073] refer to Figure 5 , Figure 5 FIG. 4 is a flow chart of a third embodiment of an air conditioner control method according to the present invention.

[0074] Based on the above second embodiment, a third embodiment of an air conditioner control method of the present invention is proposed. In this embodiment, after step S202, the following steps are further included:

[0075] Step S2021: Acquire the exhaust temperature collected by the temperature sensor during operation according to the first superheat degree.

[0076] In a specific implementation, a temperature sensor is also provided at the exhaust port of the compressor in this embodiment, through which the exhaust temperature of the compressor can be obtained, and it should be emphasized that the exhaust temperature is collected by the temperature sensor during operation according to the first superheat.

[0077] Step S2022: Record the number of times the exhaust temperature exceeds the exhaust temperature threshold and the corresponding duration.

[0078] In a specific implementation, after the exhaust temperature is obtained, it is necessary to compare the exhaust temperature with the exhaust temperature threshold, and record the number of times the exhaust temperature exceeds the exhaust temperature threshold and the corresponding duration.

[0079] Furthermore, the exhaust temperature threshold in this embodiment can be determined by the opening state of the exhaust pipe. The opening state of the exhaust includes a single-open state and a non-single-open state. When in the single-open state, the corresponding exhaust temperature threshold can be set to 92°C. When in the non-single-open state, the corresponding exhaust temperature threshold can be set to 97°C. The setting of the above temperature thresholds is only for example and can be adjusted according to actual conditions. There is no limitation on this in this embodiment.

[0080] Step S2023: When the number of times reaches a preset number of times and the duration reaches a second preset duration, adjusting the target superheat degree from the first superheat degree to a second superheat degree.

[0081] In a specific implementation, if the number of times reaches a preset number of times and the duration reaches a second preset duration, it is necessary to adjust the first superheat degree to the second superheat degree, and the monitoring period may be 1 hour.

[0082] In an optional embodiment, the preset number of times can be set to 3 times, the second duration can be set to 5s, and the second superheat can be -3 to 1°C. If the exhaust temperature is detected to exceed the exhaust temperature threshold 3 times within 1 hour and the duration exceeds 5s, the first superheat is adjusted to -3 to 1°C, that is, the control is performed according to the -3 to 1°C throttling component. The above-mentioned second duration and second superheat are set for example only and can be adjusted according to actual conditions, and are not limited in this embodiment.

[0083] This embodiment obtains the exhaust temperature collected by the temperature sensor during operation according to the first superheat; records the number of times the exhaust temperature exceeds the exhaust temperature threshold and the corresponding duration; and when the number reaches a preset number and the duration reaches a second preset duration, adjusts the target superheat from the first superheat to the second superheat. By adjusting the superheat based on the exhaust temperature in the above manner, the stability of the air conditioner operation can be further ensured.

[0084] In addition, an embodiment of the present invention 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.

[0085] 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.

[0086] Reference Figure 6 , Figure 6 FIG. 1 is a structural block diagram of a first embodiment of an air conditioner control device according to the present invention.

[0087] like Figure 6 As shown, the air conditioner control device provided in the embodiment of the present invention includes:

[0088] The acquisition module 10 is used to acquire the current outdoor ambient temperature and the length of the connecting pipe when the current operating mode is the cooling mode.

[0089] In this embodiment, the execution subject of this embodiment may be the air conditioner control device, which has functions such as data processing, data communication and program running, and the air conditioner control device may be a controller inside the air conditioner. Of course, it may also be other devices with similar functions, and this implementation condition does not limit this. For the convenience of explanation, this implementation is described by taking the air conditioner control device as an example.

[0090] It should be noted that since the multi-split system can be equipped with multiple indoor units, each indoor unit is equipped with an independent throttling component. The flow rate is controlled by the throttling component of the indoor unit for cooling, and the flow rate is controlled by the throttling component of the outdoor unit for heating. The control method of the throttling component of the indoor unit is usually adjusted according to the fixed superheat at the outlet of the indoor unit heat exchanger, such as 1 to 2°. However, the current technical solution is installed in a long connecting pipe. When operating in a high-temperature environment, the suction air will be overheated due to heat exchange with the high-temperature environment, resulting in a high exhaust temperature of the system, which reduces the system reliability and operating efficiency.

[0091] In the specific implementation, this embodiment first proposes an air conditioner structure, the structure of the air conditioner is as follows Figure 3 See Figure 3The air conditioner in this embodiment includes an indoor unit side and an outdoor unit side. The outdoor unit side is composed of a gas distributor 1, a compressor 3, a first temperature sensor 5, a four-way valve 6, a condenser 7, a throttle valve 8, a solenoid valve 9, and a plate heat exchanger 10. The compressor 3 also includes an exhaust port 2 and an enthalpy spray port 4. The first temperature sensor 5 is arranged at the exhaust pipe of the compressor and can be used to monitor the exhaust temperature of the compressor 3 in real time. The outdoor unit side is connected to the indoor unit side through a connecting pipe 11. The evaporator of the indoor unit is also provided with a second temperature sensor 12 and a third temperature sensor 13. The second temperature sensor 12 is a middle temperature sensor of the evaporator. The second temperature sensor 12 can be used to monitor the middle temperature of the evaporator in real time. The third temperature sensor 13 is arranged at the outlet of the evaporator. The third temperature sensor 13 can be used to monitor the outlet temperature of the evaporator in real time. Each indoor unit is equipped with a wire controller, and the length of the connecting pipe can be input when the wire controller is installed. It should be further explained that each indoor unit is equipped with an independent throttling component. The flow rate of cooling is controlled by the indoor unit throttling component, and the flow rate of heating is controlled by the outdoor unit throttling component. The control of the indoor unit throttling component is based on the superheat of the indoor heat exchanger outlet. However, at present, the throttling component is usually controlled according to a fixed superheat of 1 to 2. This fixed superheat method will be installed in a long pipe. When running in a high-temperature environment, the suction air will be overheated due to heat exchange with the high-temperature environment, causing the system exhaust temperature to be high. In this embodiment, the superheat will be adjusted in real time based on different situations, so that the superheat of the evaporator outlet is no longer a fixed value, but a dynamic value based on changes in the situation. It can effectively cope with the heat exchange situation in a high-temperature environment, thereby improving the stability of the entire air-conditioning system.

[0092] It should be noted that the outdoor temperature is high in the cooling mode. The multi-connected adaptive overheating prevention air conditioning system in this embodiment is aimed at the heat exchange of high-temperature environment in the cooling mode. Therefore, in this embodiment, the current operation mode of the air conditioner needs to be detected first. Specifically, after obtaining the current operation mode of the air conditioner, it is determined whether the current operation mode is the cooling mode. If it is the cooling mode, the current outdoor ambient temperature and the length of the connecting pipe are further obtained, wherein the current outdoor ambient temperature can be obtained by the ambient temperature sensor set on the outdoor unit side, and the length of the connecting pipe can be pre-entered in the wire controller of each indoor unit.

[0093] The processing module 20 is used to determine a target superheat degree of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length.

[0094] In a specific implementation, after obtaining the current outdoor ambient temperature and the length of the connecting pipe, the target superheat can be determined according to the current outdoor ambient temperature and the length of the connecting pipe in this embodiment. Specifically, the target superheat can be determined according to the size relationship between the current outdoor ambient temperature and the length of the connecting pipe and the corresponding thresholds. For example, when the current outdoor ambient temperature does not exceed the temperature threshold or the length of the connecting pipe does not exceed the preset length, the target superheat can be set to the initial superheat, and the initial superheat can be 1 to 2°C. For example, when the current outdoor ambient temperature exceeds the temperature threshold and the length of the connecting pipe exceeds the preset length, the target superheat can be set to the first superheat, and the first superheat can be -1 to 0°C. The above superheat is only for example. In actual application, it can be adjusted accordingly according to the situation to avoid invalid overheating of the air conditioner. This is not limited in this embodiment.

[0095] The control module 30 is used to control the throttling component according to the target superheat.

[0096] In a specific implementation, the control of the indoor unit throttling component is based on the superheat at the outlet of the indoor heat exchanger. Therefore, after obtaining the corresponding target superheat at the outlet of the evaporator, the throttling component can be controlled based on the target superheat in this embodiment. The control of the indoor unit throttling component is based on the superheat at the outlet of the indoor heat exchanger. Specifically, the opening of the throttling component can be adjusted based on the corresponding relationship between the superheat and the opening of the throttling component. The throttling component can also be controlled accordingly in other ways, which is not limited in this embodiment.

[0097] This embodiment obtains the current outdoor ambient temperature and the length of the connecting pipe when the current operating mode is the cooling mode; determines the target superheat of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length; and controls the throttling component according to the target superheat. Through the above method, the superheat of the evaporator can be adaptively adjusted according to different situations based on connecting pipes of different lengths and outdoor ambient temperatures, which can prevent the problem of high system temperature caused by invalid overheating in a high temperature and long connecting pipe environment of the multi-split system, thereby improving the reliability and operation efficiency of the air-conditioning system.

[0098] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0099] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0100] In addition, for technical details that are not described in detail in this embodiment, reference can be made to the air conditioner control method provided in any embodiment of the present invention, and will not be repeated here.

[0101] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0102] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0103] 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 a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for 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 the present invention.

[0104] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

[0105] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are displayed in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and it can be performed in other orders. Moreover, at least a portion of the steps in the figure may include a plurality of sub-steps or a plurality of 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 other steps or at least a portion of the sub-steps or stages of other steps.

Claims

1. An air conditioner control method, characterized in that: The air conditioner comprises an indoor unit and an outdoor unit, a connecting pipe is provided between the indoor unit and the outdoor unit, a throttling component is provided in the indoor unit, and the air conditioner control method comprises: When the current operating mode is a cooling mode, obtaining the current outdoor ambient temperature and the length of the connecting pipe; determining a target superheat degree of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length; and The throttling component is controlled according to the target superheat.

2. The air conditioner control method according to claim 1, characterized in that: The step of determining a target superheat degree of the heat exchanger outlet of the indoor unit according to the current outdoor ambient temperature and the length includes: Determining whether to turn on overheat protection according to the current outdoor ambient temperature and the length; and A target superheat degree of an outlet of a heat exchanger of the indoor unit is determined based on the determination result.

3. The air conditioner control method according to claim 2, characterized in that: The determining whether to turn on overheat protection according to the current outdoor ambient temperature and the length includes: When the current ambient temperature is greater than a first temperature threshold and the length is greater than a preset length, determining that overheat protection needs to be turned on; and When the current ambient temperature is less than or equal to the first temperature threshold or the length is less than or equal to a preset length, it is determined that overheat protection does not need to be turned on.

4. The air conditioner control method according to claim 2, characterized in that: The step of determining a target superheat degree of the heat exchanger outlet of the indoor unit based on the judgment result includes: If the overheat protection does not need to be turned on, the initial superheat degree is used as the target superheat degree at the outlet of the heat exchanger of the indoor unit.

5. The air conditioner control method according to claim 2, characterized in that: The step of determining the target superheat degree of the heat exchanger outlet of the indoor unit based on the judgment result further includes: If overheat protection needs to be turned on, then the duration that the current ambient temperature is greater than the first temperature threshold and the length is greater than the preset length is recorded; and When the duration reaches a first preset duration, the first superheat degree is used as a target superheat degree at an outlet of the heat exchanger of the indoor unit.

6. The air conditioner control method according to claim 5, characterized in that: The air conditioner further comprises a compressor, an exhaust pipe of the compressor is provided with a temperature sensor, and when the duration reaches a preset duration, the first superheat is used as a target superheat of the heat exchanger outlet of the indoor unit, further comprising: acquiring the exhaust temperature collected by the temperature sensor during operation according to the first superheat degree; Recording the number of times the exhaust temperature exceeds the exhaust temperature threshold and the corresponding duration; and When the number reaches a preset number and the duration reaches a second preset duration, the target superheat degree is adjusted from the first superheat degree to a second superheat degree, and a threshold range of the second superheat degree is greater than a threshold range of the first superheat degree.

7. The air conditioner control method according to claim 6, characterized in that: The air conditioner control method further comprises: Acquiring the opening state of the exhaust pipe; and An exhaust temperature threshold is determined according to the opening state.

8. An air conditioner control device, characterized in that: The air conditioner comprises an indoor unit and an outdoor unit, a connecting pipe is provided between the indoor unit and the outdoor unit, a throttling component is provided in the indoor unit, and the air conditioner control device comprises: An acquisition module, used for acquiring the current outdoor ambient temperature and the length of the connecting pipe when the current operating mode is a cooling mode; a processing module, configured to determine a target superheat degree of an outlet of a heat exchanger of the indoor unit according to the current outdoor ambient temperature and the length; and A control module is used to control the throttling component according to the target superheat.

9. An air conditioner control device, characterized in that: The air conditioner control device comprises: a memory, a processor, and an air conditioner control program stored in the memory and running 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 7.

10. A storage medium, characterized in that: 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 7 is implemented.

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