Air conditioner control method and device, storage medium and air conditioner

Abstract

The invention relates to an air conditioner control method and device, a storage medium and an air conditioner, the outdoor environment temperature is obtained in response to a shutdown instruction, when the outdoor environment temperature is smaller than the target temperature, an outdoor expansion valve is closed, so that a refrigerant is stopped from being output to the outdoor side, and meanwhile, a compressor is controlled to stop by delaying the target time; the compressor can output the refrigerant on the outdoor side to the indoor side within the target time, the number of the refrigerant on the outdoor side is reduced, and therefore the problem of refrigerant liquefaction caused by the outdoor low-temperature environment can be avoided, and the heating efficiency and the heating effect after the air conditioner is started are improved.

Description

Technical Field

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

[0002] After receiving the shutdown signal, the compressor of the existing air conditioner stops immediately, and a large amount of refrigerant is stored in the outdoor unit. After being shut down for a long time in a low-temperature environment, the refrigerant becomes liquid due to the influence of the low temperature environment. After the air conditioner receives the startup signal, due to the low dryness of the refrigerant, the compressor cannot immediately achieve a high exhaust superheat after starting, resulting in a long heating time and poor heating effect. Summary of the invention

[0003] The embodiments of the present application provide an air conditioner control method, device, storage medium and air conditioner, which can improve the heating efficiency of the air conditioner.

[0004] In a first aspect, an embodiment of the present application provides an air conditioner control method, which is applied to an air conditioner in a heating mode, comprising:

[0005] In response to a shutdown instruction, obtaining an outdoor ambient temperature;

[0006] If the outdoor ambient temperature is lower than the target temperature, the outdoor expansion valve is closed; the outdoor expansion valve is arranged on the refrigerant input pipe of the outdoor unit;

[0007] After delaying the target time, the compressor is controlled to stop.

[0008] After the target delay time, the compressor is controlled to stop, including:

[0009] Get low pressure;

[0010] If the low pressure is less than the first target low pressure, controlling the compressor to stop;

[0011] If the low pressure is greater than or equal to the first target low pressure, the compressor is controlled to stop after a target delay time.

[0012] Optionally, also include:

[0013] In response to a heating instruction, controlling the compressor to start;

[0014] If the low pressure is lower than the second target low pressure, the outdoor expansion valve is opened.

[0015] Optionally, opening the outdoor expansion valve includes:

[0016] Determining a target opening degree of the outdoor expansion valve according to the real-time outdoor ambient temperature;

[0017] The opening degree of the outdoor expansion valve is adjusted to the target opening degree.

[0018] Optionally, also include:

[0019] If the outdoor ambient temperature is greater than or equal to the target temperature, the outdoor expansion valve is closed and the compressor is controlled to stop.

[0020] Optionally, the air conditioner further comprises a lubricating oil recovery circuit for recovering lubricating oil, wherein an input end of the lubricating oil recovery circuit is connected to an exhaust port of the compressor, and an output end of the lubricating oil recovery circuit is connected to a lubricating oil input port of the compressor.

[0021] In a second aspect, an embodiment of the present application provides an air conditioner control device, which is applied to an air conditioner in a heating mode, and the device includes:

[0022] An outdoor environment temperature acquisition module, used to obtain the outdoor environment temperature in response to a shutdown instruction;

[0023] An expansion valve closing module, used to close an outdoor expansion valve if the outdoor ambient temperature is lower than a target temperature; the outdoor expansion valve is arranged on a refrigerant input pipe of an outdoor unit;

[0024] The compressor shutdown module is used to control the compressor to shut down after a delay target time.

[0025] In a third aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the air conditioner control method as described in any one of the above.

[0026] In a fourth aspect, an embodiment of the present application provides an outdoor unit of an air conditioner, comprising a refrigerant input pipe, a refrigerant output pipe, an outdoor expansion valve, a compressor, a memory, a processor, and a computer program stored in the memory and executable by the processor;

[0027] The air conditioner outdoor unit is connected to the air conditioner indoor unit through the refrigerant input pipe and the refrigerant output pipe, and the outdoor expansion valve is arranged on the refrigerant input pipe;

[0028] When the processor executes the computer program, the steps of any one of the air conditioner control methods described above are implemented.

[0029] In a fifth aspect, an embodiment of the present application provides an air conditioner, comprising an air conditioner outdoor unit and an air conditioner indoor unit as described above; the air conditioner outdoor unit is connected to the air conditioner indoor unit via the refrigerant input pipe and the refrigerant output pipe.

[0030] In an embodiment of the present application, the outdoor ambient temperature is obtained by responding to a shutdown instruction. When the outdoor ambient temperature is lower than the target temperature, the outdoor expansion valve is closed to stop outputting the refrigerant to the outdoors. At the same time, the compressor is controlled to shut down by delaying the target time, so that the compressor can output the refrigerant on the outdoor side to the indoor side within the target time, thereby reducing the amount of refrigerant on the outdoor side, thereby avoiding the problem of refrigerant liquefaction caused by the low outdoor temperature environment and improving the heating efficiency and heating effect after the air conditioner is started.

[0031] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of an application scenario of an air conditioner control method according to an embodiment of the present invention;

[0033] Figure 2 A flow chart of an air conditioner control method according to an embodiment of the present invention;

[0034] Figure 3 is a flow chart of step S130 in one embodiment of the present invention;

[0035] Figure 4 A flow chart of an air conditioner control method according to another embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the structure of an air conditioner control device according to an embodiment of the present invention;

[0037] Figure 6 It is a structural schematic diagram of an outdoor unit of an air conditioner in one embodiment of the present invention;

[0038] Figure 7 The figure is a schematic diagram of the structure of an air conditioner in one embodiment of the present invention. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present application more clear, the embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0040] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0041] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0042] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0043] In addition, in the description of this application, unless otherwise specified, "several" means two or more. "And / or" describes the corresponding relationship of the associated objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0044] See also Figure 1 , which is a schematic diagram of an air conditioner according to an embodiment of the present application. Figure 1 As shown, the air conditioner includes a compressor 110 , an indoor heat exchanger 120 , an outdoor expansion valve 130 , and an outdoor heat exchanger 140 .

[0045] It should be noted that the above embodiment is only an example of the present application. The air conditioner of the embodiment of the present application may also include a gas-liquid separator, a capillary tube, a four-way valve and other components that are beneficial to the operation of the air conditioner or the circulation of the refrigerant, which are not limited here.

[0046] like Figure 1 As shown, the air conditioner includes an indoor unit (indoor side) arranged indoors and an outdoor unit (outdoor side) arranged outdoors, the indoor unit and the outdoor unit are connected by a refrigerant pipe, and the refrigerant circulates in the refrigerant pipe.

[0047] The indoor heat exchanger 120 may be provided in the indoor unit, and the compressor 110, the outdoor expansion valve 130, and the outdoor heat exchanger 140 may be provided in the outdoor unit.

[0048] The outdoor expansion valve 130 is disposed on the refrigerant input pipeline of the outdoor unit and is used to control the flow rate of the refrigerant entering the outdoor unit.

[0049] In the embodiment of the present application, the outdoor expansion valve 130 can be specifically arranged on the refrigerant input pipe of the indoor heat exchanger 120 to control the flow rate of the refrigerant entering the outdoor heat exchanger.

[0050] When the air conditioner is working in heating mode, the compressor 110 compresses the refrigerant, and the compressed high-temperature and high-pressure refrigerant is sent to the indoor heat exchanger 120 to release heat. The high-pressure liquid after heat release passes through the outdoor expansion valve 130 to reduce the pressure and temperature, enters the outdoor heat exchanger 140 to absorb heat, and is converted into a low-temperature and low-pressure gas and then sucked into the compressor 110 to enter the next round of heating cycle.

[0051] Refrigerant dryness refers to the weight proportion of refrigerant vapor in wet saturated steam. Dryness is an important parameter used to describe the state of refrigerant in refrigeration systems, usually expressed as a value between 0 and 1. 0 represents a fully saturated liquid phase, and 1 represents a fully saturated gas phase. The closer the dryness is to 0, the higher the proportion of the liquid phase; the closer the dryness is to 1, the higher the proportion of the gas phase.

[0052] Exhaust superheat refers to the temperature difference between the temperature of the compressor exhaust pipe or condenser inlet and the saturation temperature corresponding to the actual condensing pressure.

[0053] During the heating process of the air conditioner, controlling the exhaust superheat at the target exhaust superheat can improve the heating efficiency of the air conditioner, prevent liquid refrigerant from entering the compressor to cause liquid hammer, and keep the lubricating oil of the compressor at a certain fluidity, thereby improving the reliability of the compressor operation and ensuring the stable operation and heating efficiency of the air conditioner.

[0054] In the above process, when the air conditioner receives a shutdown signal, the compressor 110 stops immediately. At this time, a large amount of refrigerant is stored in the outdoor heat exchanger 140. When the air conditioner is shut down for a long time in a low temperature environment, the refrigerant in the outdoor heat exchanger 140 gradually cools down. When the ambient temperature is lower than the boiling point of the refrigerant, the refrigerant will gradually liquefy. When the air conditioner receives a heating command, due to the low dryness of the refrigerant, the compressor cannot drive the target exhaust superheat for a long time after starting, affecting the heating efficiency.

[0055] Therefore, for the above questions, please refer to Figure 2 The embodiment of the present application provides an air conditioner control method, which is applied to an air conditioner in heating mode, comprising:

[0056] S110: In response to the shutdown instruction, obtaining the outdoor ambient temperature;

[0057] The shutdown command may be a command issued by a user through an external input device such as a remote controller or a mobile phone, or directly operating on the control panel of the air conditioner. The shutdown command is used to control the air conditioner to shut down.

[0058] The outdoor ambient temperature can be detected by a temperature sensor installed in the outdoor unit.

[0059] S120: If the outdoor ambient temperature is lower than the target temperature, close the outdoor expansion valve; the outdoor expansion valve is arranged on the refrigerant input pipe of the outdoor unit;

[0060] The target temperature can be a lower temperature pre-set by the user. When the outdoor ambient temperature is lower than the target temperature, it indicates that there is a greater risk of liquefaction of the refrigerant in the outdoor unit. Therefore, the outdoor expansion valve is closed to prevent the refrigerant from entering the outdoor side.

[0061] S130: After delaying for a target time, the compressor is controlled to stop.

[0062] The target time can be set according to the actual operating conditions.

[0063] During the target time, the compressor remains in working condition, so that the refrigerant on the outdoor side can be output to the indoor side, reducing the amount of refrigerant on the outdoor side and preventing the refrigerant from liquefying due to the low temperature environment. When the air conditioner is restarted, the compressor can inhale refrigerant with higher dryness to quickly obtain the target superheat, thereby improving the heating efficiency of the air conditioner.

[0064] In an embodiment of the present application, the outdoor ambient temperature is obtained by responding to a shutdown instruction. When the outdoor ambient temperature is lower than the target temperature, the outdoor expansion valve is closed to stop outputting the refrigerant to the outdoors. At the same time, the compressor is controlled to shut down by delaying the target time, so that the compressor can output the refrigerant on the outdoor side to the indoor side within the target time, thereby reducing the amount of refrigerant on the outdoor side, thereby avoiding the problem of refrigerant liquefaction caused by the low temperature outdoor environment and improving the heating efficiency and heating effect after the air conditioner is started.

[0065] In the above embodiment, the compressor continues to work within the target time to output the refrigerant on the outdoor side to the indoor side. However, when the flow rate of the refrigerant on the outdoor side is low, controlling the compressor to work within the target time will cause energy waste.

[0066] Therefore, if Figure 3 As shown, in a preferred embodiment, after the target delay time, the compressor is controlled to stop, including:

[0067] S131: obtaining low pressure;

[0068] Low pressure refers to the pressure on the low-pressure side of the air conditioner. The low-pressure side refers to the part of the air conditioner where the refrigerant is at a lower pressure, such as the evaporator where the refrigerant absorbs heat and becomes a low-pressure and low-temperature gaseous refrigerant, and the suction end of the compressor used to inhale low-pressure and low-temperature gaseous refrigerant from the evaporator.

[0069] The magnitude of the low pressure can reflect the working state of the refrigerant in the evaporator. In the embodiment of the present application, whether the refrigerant is sufficient can be determined based on the low pressure.

[0070] The low pressure can be detected by a pressure switch arranged on the low pressure side, for example, it can be detected by a pressure switch arranged at the suction end of the compressor.

[0071] S132: If the low pressure is lower than the first target low pressure, control the compressor to stop;

[0072] The first target low pressure can be set according to actual application.

[0073] When the low pressure is less than the first target low pressure, it means that the amount of refrigerant in the outdoor unit is low. At this time, the compressor can be controlled to stop immediately.

[0074] S133: If the low pressure is greater than or equal to the first target low pressure, the compressor is controlled to stop after a target delay time.

[0075] When the low pressure is greater than or equal to the first target low pressure, it means that the amount of refrigerant on the outdoor side is high. At this time, the compressor is kept running to output the refrigerant on the outdoor side to the indoor side.

[0076] In an embodiment of the present application, by obtaining the low pressure of the air conditioner and determining whether the low pressure is less than a first target low pressure, when the low pressure is less than the first target low pressure, the compressor is controlled to shut down immediately to save energy; when the low pressure is greater than or equal to the first target low pressure, the compressor continues to be controlled to delay the target time to ensure that the refrigerant on the indoor side can be output to the indoor side, thereby improving the heating efficiency of the air conditioner.

[0077] like Figure 4 As shown, in one embodiment, the air conditioner control method further includes:

[0078] S210: In response to a heating instruction, controlling the compressor to start;

[0079] The heating command may be a command issued by a user through an external input device such as a remote controller or a mobile phone, or directly operating the control panel of the air conditioner. The heating command is used to control the air conditioner to start in heating mode.

[0080] After receiving the heating command, the compressor is immediately controlled to start. After the compressor starts, it inhales refrigerant with a higher dryness, which can quickly achieve the target superheat and improve the heating efficiency.

[0081] S220: If the low pressure is lower than the second target low pressure, open the outdoor expansion valve.

[0082] The second target low pressure can be set according to user needs.

[0083] The second target low pressure may be the same as the first target low pressure, or may be different from the first target low pressure.

[0084] If the low pressure is greater than or equal to the second target low pressure, the outdoor expansion valve may not be opened first, and the refrigerant may be sucked in by the started compressor to reduce the low pressure until the low pressure is less than the second target low pressure.

[0085] In an embodiment of the present application, by controlling the start of the compressor in response to a heating command, the compressor inhales a refrigerant with a higher dryness after starting, and can quickly achieve a target superheat, thereby improving the heating efficiency. When it is detected that the low pressure is less than the second target low pressure, the outdoor expansion valve is opened, thereby allowing the refrigerant to circulate in the air conditioner.

[0086] Optionally, opening the outdoor expansion valve may be adjusting the opening of the outdoor expansion valve to a preset opening, where the preset opening may be an opening preset by a user, thereby controlling the flow of the refrigerant entering the outdoor unit.

[0087] Alternatively, in another embodiment, opening the outdoor expansion valve includes:

[0088] Determining a target opening degree of the outdoor expansion valve according to the real-time outdoor ambient temperature;

[0089] The opening degree of the outdoor expansion valve is adjusted to the target opening degree.

[0090] The correspondence between the outdoor ambient temperature and the target opening can be preset by the user. When determining the target opening of the outdoor expansion valve, the target opening of the outdoor expansion valve is determined based on the correspondence and the real-time outdoor ambient temperature.

[0091] The outdoor expansion valve may be an electronic expansion valve, which can achieve precise control of the refrigerant flow rate through electronic control.

[0092] The outdoor expansion valve adjusts the flow of refrigerant entering the outdoor unit according to changes in the outdoor ambient temperature, which can ensure that the refrigerant can fully absorb heat in the evaporator, improve heating efficiency, and avoid energy waste. At the same time, it can avoid pressure and temperature fluctuations caused by improper refrigerant flow and improve the reliability of air conditioner operation.

[0093] In an embodiment of the present application, the target opening of the outdoor expansion valve is determined according to the real-time outdoor ambient temperature, so that the flow rate of the refrigerant entering the outdoor unit can be adjusted according to the real-time outdoor environment, so that the refrigerant can fully absorb heat during the circulation process, thereby improving the heating efficiency and the reliability of the air conditioner operation.

[0094] In one embodiment, the air conditioner control method further includes:

[0095] If the outdoor ambient temperature is greater than or equal to the target temperature, the outdoor expansion valve is closed and the compressor is controlled to stop.

[0096] When the outdoor ambient temperature is greater than or equal to the target temperature, it means that the current outdoor ambient temperature is high and there is no risk of liquefaction of the refrigerant outdoors. Therefore, when a shutdown command is received, the compressor can be immediately controlled to stop and the outdoor expansion valve can be closed. There is no need to control the compressor to delay shutdown, thus saving energy.

[0097] When the air conditioner is shut down for a long time in a low temperature environment, the viscosity of the compressor lubricating oil increases due to the influence of temperature, and the fluidity becomes worse. When the compressor starts, greater force is required to overcome the resistance of the lubricating oil, resulting in difficulty in starting, and may even cause damage to the compressor, affecting the safe operation of the compressor.

[0098] Due to the increase in lubricating oil viscosity, after receiving the start-up signal, the lubricating oil of the compressor will be discharged into the indoor pipe along with the heating cycle, and it is easy to adhere to the pipe and cause pipe blockage, thereby affecting the heating performance; and the reduction of lubricating oil in the compressor will also affect the operating reliability of the compressor.

[0099] In one embodiment, the air conditioner further comprises a lubricating oil recovery circuit for recovering lubricating oil, wherein the input end of the lubricating oil recovery circuit is connected to the exhaust port of the compressor, and the output end of the lubricating oil recovery circuit is connected to the lubricating oil input port of the compressor.

[0100] The lubricating oil recovery circuit is used to recover the lubricating oil of the compressor. Specifically, the lubricating oil recovery circuit can utilize an oil separator to intercept the lubricating oil in the exhaust gas and return it to the compressor, thereby recovering the lubricating oil of the compressor.

[0101] The oil separator uses the difference in density between gaseous refrigerant and liquid lubricant to separate lubricant from gaseous refrigerant under the action of inertia, gravity, centrifugal force, etc. The oil separator can be a filter type, centrifugal type, washing type, packing type, etc.

[0102] The air conditioner control method of the embodiment of the present application stops outputting the refrigerant to the outdoor side by closing the outdoor expansion valve when the outdoor ambient temperature is lower than the target temperature. At the same time, the compressor is controlled to stop by delaying the target time, so that the compressor can output the refrigerant on the outdoor side to the indoor side within the target time, thereby avoiding the liquefaction of the refrigerant in a low-temperature environment and improving the dryness of the refrigerant. When the air conditioner starts heating in response to a heating signal, due to the high height of the refrigerant, the compressor can quickly obtain the target exhaust superheat, and the lubricating oil of the compressor can maintain a certain fluidity and is not easy to adhere to the pipeline, so that the lubricating oil recovery circuit can better recycle the lubricating oil, and the compressor oil pool can retain a sufficient amount of lubricating oil, thereby improving the lubrication effect and operation reliability of the compressor.

[0103] Optionally, the compressor of the present application may be a variable frequency compressor. Through the air conditioner control method of the present application, the compressor can quickly achieve the target superheat after shutdown and restart, ensuring that the compressor can remain stable during the frequency increase process, thereby improving the heating effect and operating reliability of the compressor.

[0104] Optionally, the air conditioner of the present application may be a multi-split air conditioner, which may include one outdoor unit and multiple indoor units.

[0105] Each indoor unit of the multi-split air conditioner can be controlled independently, and users can adjust the temperature individually according to the needs of different rooms to achieve a personalized comfort experience.

[0106] The outdoor unit may include a single compressor or multiple compressors, and the air conditioner control method of the present application may simultaneously control one or more compressors of the outdoor unit.

[0107] Multi-split air conditioners can achieve high operating efficiency at partial loads and significant energy saving effects by precisely controlling the refrigerant flow.

[0108] like Figure 5 As shown, the embodiment of the present application further provides an air conditioner control device, which is applied to an air conditioner in heating mode, and the device includes:

[0109] The outdoor environment temperature acquisition module 210 is used to obtain the outdoor environment temperature in response to the shutdown instruction;

[0110] The expansion valve closing module 220 is used to close the outdoor expansion valve if the outdoor ambient temperature is lower than the target temperature; the outdoor expansion valve is arranged on the refrigerant input pipeline of the outdoor unit;

[0111] The compressor shutdown module 230 is used to control the compressor to shut down after a target delay time.

[0112] In one embodiment, the compressor shutdown module 230 includes:

[0113] A low pressure acquisition unit, used for acquiring low pressure;

[0114] a first shutdown unit, configured to control the compressor to shut down if the low pressure is less than a first target low pressure;

[0115] The second shutdown unit is used to control the compressor to shut down after a target delay time if the low pressure is greater than or equal to the first target low pressure.

[0116] In one embodiment, the apparatus further comprises:

[0117] A compressor start module, used for controlling the compressor to start in response to a heating instruction;

[0118] The expansion valve opening module is used to open the outdoor expansion valve if the low pressure is less than the second target low pressure.

[0119] In one embodiment, the expansion valve opening module includes:

[0120] a target opening determination unit, configured to determine a target opening of the outdoor expansion valve according to a real-time outdoor ambient temperature;

[0121] The opening adjustment unit is used to adjust the opening of the outdoor expansion valve to the target opening.

[0122] In one embodiment, the apparatus further comprises:

[0123] The control module is used to close the outdoor expansion valve and control the compressor to stop if the outdoor ambient temperature is greater than or equal to the target temperature.

[0124] In one embodiment, the air conditioner further comprises a lubricating oil recovery circuit for recovering lubricating oil, wherein the input end of the lubricating oil recovery circuit is connected to the exhaust port of the compressor, and the output end of the lubricating oil recovery circuit is connected to the lubricating oil input port of the compressor.

[0125] It should be noted that the air conditioner control device provided in the above embodiment only uses the division of the above functional modules as an example when executing the air conditioner control method. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device is divided into different functional modules to complete all or part of the functions described above. In addition, the air conditioner control device provided in the above embodiment and the air conditioner control method in the above embodiment belong to the same concept, and the implementation process thereof is detailed in the method embodiment, which will not be repeated here.

[0126] An embodiment of the present application further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the air conditioner control method as described in any one of the above are implemented.

[0127] The embodiments of the present application may take the form of a computer program product implemented on one or more storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing program code. Computer-readable storage media include permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, modules of programs, or other data. Examples of computer storage media include but are not limited to: phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, tape disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device.

[0128] like Figure 6 As shown, the embodiment of the present application further provides an air conditioner outdoor unit 300, including a refrigerant input pipe 310, a refrigerant output pipe 320, an outdoor expansion valve 330, a compressor 340, an outdoor heat exchanger 350, a memory 360, a processor 370, and a computer program stored in the memory 360 and executable by the processor 370;

[0129] The air conditioner outdoor unit 300 is connected to the air conditioner indoor unit through a refrigerant input pipe 310 and a refrigerant output pipe 320, and the outdoor expansion valve 330 is arranged on the refrigerant input pipe 310;

[0130] When the processor 370 executes the computer program, the steps of any one of the air conditioner control methods described above are implemented.

[0131] The memory 360 includes a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium that can be used to carry or store data.

[0132] The processor 370 is the control core (Control Unit) of the air conditioner 300. It uses various interfaces and lines to connect the various components of the entire air conditioner 300. It runs or executes the programs or modules stored in the memory 360, and calls the data stored in the memory 360 to perform various functions of the air conditioner 300 and process data. For example, when the processor 370 executes the computer program stored in the memory 360, it implements all or part of the steps of the air conditioner control method described in the embodiment of the present application; or implements all or part of the functions of the air conditioner control device. The processor 370 can be composed of an integrated circuit, for example, it can be composed of a single packaged integrated circuit, or it can be composed of multiple integrated circuits with the same or different functions, including one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and a combination of various control chips.

[0133] In one embodiment, the air conditioner outdoor unit 300 also includes a lubricating oil recovery circuit for recovering lubricating oil, the input end of the lubricating oil recovery circuit is connected to the exhaust port of the compressor 340, and the output end of the lubricating oil recovery circuit is connected to the lubricating oil input port of the compressor 340.

[0134] The lubricating oil recovery circuit is used to recover the lubricating oil of the compressor. Specifically, the lubricating oil recovery circuit can utilize an oil separator to intercept the lubricating oil in the exhaust gas and return it to the compressor 340 , thereby recovering the lubricating oil of the compressor 340 .

[0135] like Figure 7 As shown, the embodiment of the present application also provides an air conditioner 400, including the air conditioner outdoor unit 300 and the air conditioner indoor unit 410 as described above; the air conditioner outdoor unit 300 is connected to the air conditioner indoor unit 410 via a refrigerant input pipe and a refrigerant output pipe.

[0136] It should be noted that the above embodiment is only an example of the present application. The air conditioner of the embodiment of the present application may also include a gas-liquid separator, a capillary tube, a four-way valve and other components that are beneficial to the operation of the air conditioner or the circulation of the refrigerant, which are not limited here.

[0137] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device 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, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0138] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. An air conditioner control method, characterized in that: Air conditioner used in heating mode, including: In response to a shutdown instruction, obtaining an outdoor ambient temperature; If the outdoor ambient temperature is lower than the target temperature, the outdoor expansion valve is closed; the outdoor expansion valve is arranged on the refrigerant input pipe of the outdoor unit; After delaying the target time, the compressor is controlled to stop.

2. The air conditioner control method according to claim 1, characterized in that: After the target delay time, the compressor is controlled to stop, including: Get low pressure; If the low pressure is less than the first target low pressure, controlling the compressor to stop; If the low pressure is greater than or equal to the first target low pressure, the compressor is controlled to stop after a target delay time.

3. The air conditioner control method according to claim 1, characterized in that: Also includes: In response to a heating instruction, controlling the compressor to start; If the low pressure is lower than the second target low pressure, the outdoor expansion valve is opened.

4. The air conditioner control method according to claim 3, characterized in that: Opening the outdoor expansion valve comprises: Determining a target opening degree of the outdoor expansion valve according to the real-time outdoor ambient temperature; The opening degree of the outdoor expansion valve is adjusted to the target opening degree.

5. The air conditioner control method according to claim 1, characterized in that: Also includes: If the outdoor ambient temperature is greater than or equal to the target temperature, the outdoor expansion valve is closed and the compressor is controlled to stop.

6. The air conditioner control method according to claim 1, characterized in that: The air conditioner also includes a lubricating oil recovery circuit for recovering lubricating oil, wherein the input end of the lubricating oil recovery circuit is connected to the exhaust port of the compressor, and the output end of the lubricating oil recovery circuit is connected to the lubricating oil input port of the compressor.

7. An air conditioner control device, characterized in that: An air conditioner applied to a heating mode, the device comprising: An outdoor environment temperature acquisition module, used to obtain the outdoor environment temperature in response to a shutdown instruction; An expansion valve closing module, used to close an outdoor expansion valve if the outdoor ambient temperature is lower than a target temperature; the outdoor expansion valve is arranged on a refrigerant input pipe of an outdoor unit; The compressor shutdown module is used to control the compressor to shut down after a delay target time.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the air conditioner control method as described in any one of claims 1 to 6 are implemented.

9. An outdoor unit of an air conditioner, comprising a refrigerant input pipe, a refrigerant output pipe, an outdoor expansion valve, a compressor, a memory, a processor, and a computer program stored in the memory and executable by the processor; The air conditioner outdoor unit is connected to the air conditioner indoor unit through the refrigerant input pipe and the refrigerant output pipe, and the outdoor expansion valve is arranged on the refrigerant input pipe; When the processor executes the computer program, the steps of the air conditioner control method according to any one of claims 1 to 6 are implemented.

10. An air conditioner, comprising the air conditioner outdoor unit and the air conditioner indoor unit as claimed in claim 9; the air conditioner outdoor unit is connected to the air conditioner indoor unit through the refrigerant input pipe and the refrigerant output pipe.

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