Oil return control method and device of air conditioner and air conditioner

Abstract

The application relates to the air conditioning technical field, and provides an oil return control method and device of an air conditioner and the air conditioner. The oil return control method of the air conditioner comprises the following steps: in the case that the air conditioner is started and operated, the actual oil amount in the compressor of the air conditioner is acquired; it is determined that the actual oil amount in the compressor is less than a target preset oil amount, and the air conditioner is controlled to execute an oil return strategy. The application can directly and timely detect the oil amount in the compressor, accurately and rapidly judges whether the compressor is short of oil, and controls whether the air conditioner enters the oil return operation, thereby effectively improving the accuracy and efficiency of the oil return control, guaranteeing the oil return effect of the compressor, and achieving the purpose of protecting the compressor.

Description

TECHNICAL FIELD

[0001] The present application relates to the air conditioning technical field, and particularly relates to an oil return control method and device of an air conditioner and the air conditioner. BACKGROUND

[0002] During operation of the air conditioner, refrigerant and lubricating oil of the compressor enter a circulating loop for circulating flow, and finally return to the compressor.

[0003] At present, the oil return control mode commonly adopted by the compressor is as follows: if the operating frequency of the compressor continuously reaches a set frequency for a set time length, oil return operation is entered. However, this mode has the following problems: the operating frequency of the compressor is easily affected by the outdoor ambient temperature, resulting in low accuracy of judging oil return operation by means of low-frequency accumulated operation time length, thereby affecting the oil return effect of the compressor, and the heat exchange capacity of the air conditioner is reduced. SUMMARY

[0004] The present application provides an oil return control method and device of an air conditioner and the air conditioner, which can directly and timely detect the oil amount in the compressor, accurately and rapidly judge whether the oil in the compressor is insufficient, and control whether the air conditioner enters oil return operation, thereby effectively improving the accuracy and efficiency of oil return control, ensuring the oil return effect of the compressor, and achieving the purpose of protecting the compressor.

[0005] The present application provides an oil return control method of an air conditioner, comprising:

[0006] In the case that the air conditioner is started and operated, the actual oil amount in the compressor of the air conditioner is acquired.

[0007] If the actual oil amount in the compressor is less than a target preset oil amount, the air conditioner is controlled to execute an oil return strategy.

[0008] According to the oil return control method of the air conditioner provided by the present application, the step of determining that the actual oil amount in the compressor is less than the target preset oil amount and controlling the air conditioner to execute the oil return strategy specifically comprises:

[0009] If the actual oil amount in the compressor continuously reaches the target preset oil amount for a first preset time length, the air conditioner is controlled to execute the oil return strategy.

[0010] According to the oil return control method of the air conditioner provided by the present application, the step of determining that the actual oil amount in the compressor is less than the target preset oil amount and controlling the air conditioner to execute the oil return strategy specifically comprises:

[0011] The change of the actual oil amount in the compressor is detected.

[0012] The actual oil amount inside the compressor is determined to fluctuate up and down based on the target preset oil amount, and in a second preset time length in the fluctuation process, the actual oil amount inside the compressor is less than the target preset oil amount for a cumulative time length reaching a third preset time length, the air conditioner is controlled to execute an oil return strategy.

[0013] According to the oil return control method of the air conditioner provided by the application, the step of determining that the actual oil amount inside the compressor is less than the target preset oil amount and controlling the air conditioner to execute an oil return strategy specifically comprises:

[0014] detecting the change of the actual oil amount inside the compressor;

[0015] The actual oil amount inside the compressor is determined to fluctuate up and down based on the target preset oil amount, and in a fourth preset time length in the fluctuation process, the actual oil amount inside the compressor is less than the target preset oil amount for a cumulative number of times reaching a first preset number of times, the air conditioner is controlled to execute an oil return strategy.

[0016] According to the oil return control method of the air conditioner provided by the application, the step of determining that the actual oil amount inside the compressor is less than the target preset oil amount and controlling the air conditioner to execute an oil return strategy specifically comprises:

[0017] detecting the change of the actual oil amount inside the compressor;

[0018] In the case that the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, the time length of the fluctuation is divided into a plurality of fifth preset time lengths, in each fifth preset time length, an oil amount difference value between a maximum oil amount value and a minimum oil amount value of the actual oil amount inside the compressor is obtained;

[0019] The cumulative number of times that the oil amount difference value reaches a preset value reaches a second preset number of times, the air conditioner is controlled to execute an oil return strategy.

[0020] According to the oil return control method of the air conditioner provided by the application, the step of controlling the air conditioner to execute an oil return strategy specifically comprises:

[0021] The compressor is controlled to operate at a set frequency and the electronic expansion valve of the air conditioner is controlled to operate at a set opening degree for a sixth preset time length, so as to reach the target preset oil amount.

[0022] According to the oil return control method of the air conditioner provided by the application, after the step of reaching the target preset oil amount, the method further comprises:

[0023] The air conditioner is controlled to exit the oil return strategy and restore the operating condition.

[0024] The oil return control method of the air conditioner provided by the application comprises the following steps:

[0025] If the actual oil amount in the compressor is determined to be greater than or equal to the target preset oil amount, the air conditioner is controlled to continue running in the current running mode.

[0026] The application further provides an oil return control device of an air conditioner, which comprises:

[0027] An acquisition module is configured to acquire an actual oil amount in a compressor of the air conditioner when the air conditioner is started and runs.

[0028] A control module is configured to determine that the actual oil amount in the compressor is less than a target preset oil amount, and control the air conditioner to execute an oil return strategy.

[0029] The application further provides an air conditioner, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor executes the program to implement the oil return control method of the air conditioner.

[0030] The oil return control method, device and air conditioner provided by the application can detect the actual oil amount in the compressor of the air conditioner in real time when the air conditioner is started and runs, and can control the air conditioner to execute an oil return strategy for oil return when the actual oil amount in the compressor is less than a target preset oil amount. Therefore, the application can accurately and quickly determine whether the compressor is short of oil by directly detecting the oil amount in the compressor, so as to control whether the air conditioner enters oil return operation, effectively improve the accuracy and efficiency of oil return control, and ensure the oil return effect of the compressor, thereby achieving the purpose of protecting the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the application or the related art, the following will briefly introduce the drawings needed to be used in the embodiments or the related art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0032] Figure 1 is one of the flowcharts of the oil return control method of the air conditioner provided by the application;

[0033] Figure 2 is another flowchart of the oil return control method of the air conditioner provided by the application;

[0034] Figure 3 is a third flowchart of the oil return control method of the air conditioner provided by the application;

[0035] Figure 4 Figure 4 is a flowchart of a fourth oil return control method of an air conditioner according to the present application;

[0036] Figure 5 Figure 5 is a flowchart of a fifth oil return control method of an air conditioner according to the present application;

[0037] Figure 6 Figure 6 is a structural diagram of an oil return control device of an air conditioner according to the present application;

[0038] Figure 7 Figure 7 is a structural diagram of an air conditioner according to the present application.

[0039] Reference signs:

[0040] 610: acquisition module; 620: control module;

[0041] 710: processor; 720: communication interface;

[0042] 730: memory; 740: communication bus. DETAILED DESCRIPTION

[0043] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some embodiments of the present application, but not all embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0044] In the description of the embodiments of the present application, it should be noted that the directions or position relationships indicated by the terms “inner”, “outer” and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular direction, be constructed and operated in a particular direction, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms “first”, “second” and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “connected”, “connected” should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0046] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0047] The following will be described in conjunction with Figures 1-7 The oil return control method and device of the air conditioner and the air conditioner of the present application are described.

[0048] According to one embodiment of the present application, the present application provides an air conditioner, mainly comprising: a compressor, an evaporator, a condenser, an electronic expansion valve, an oil amount sensor and a controller.

[0049] The two ends of the compressor are connected with the evaporator and the condenser respectively, the evaporator is connected with the condenser, and the electronic expansion valve is connected between the evaporator and the condenser to form a refrigerant circulation loop.

[0050] When refrigerating, the high-temperature and high-pressure refrigerant gas generated by the compressor is sent to the condenser outside to release heat, throttled by the electronic expansion valve, and then flows through the evaporator inside to absorb heat and evaporate to refrigerate, and finally returns to the compressor.

[0051] When heating, the high-temperature and high-pressure refrigerant gas generated by the compressor is sent to the evaporator inside to release heat, throttled by the electronic expansion valve, and then flows through the condenser outside to absorb heat and evaporate, and finally returns to the compressor.

[0052] The oil amount sensor is arranged in the interior of the compressor and is mainly used for detecting the actual oil amount in the interior of the compressor in real time; the controller is connected with the compressor, the electronic expansion valve and the oil amount sensor respectively, and is used for controlling the operating frequency of the compressor and the opening degree of the electronic expansion valve according to the detected actual oil amount in the interior of the compressor to perform oil return operation, and the specific control process is described below.

[0053] The air conditioner provided by the embodiment of the present application can accurately and quickly judge whether the interior of the compressor is short of oil by arranging the oil amount sensor in the interior of the compressor to detect the oil amount in the interior of the compressor in real time, so as to control whether the air conditioner enters the oil return operation, effectively improve the accuracy and efficiency of the oil return control, and thus ensure the oil return effect of the compressor and achieve the purpose of protecting the compressor.

[0054] According to one embodiment of the present application, with reference to Figure 1As shown, the present application provides an oil return control method of an air conditioner, mainly comprising the following steps:

[0055] S100, in the case of starting operation of the air conditioner, the actual oil amount in the compressor of the air conditioner is obtained.

[0056] Specifically, the oil amount sensor can be arranged in the compressor, and the oil amount sensor can be used to detect the oil amount in the compressor in real time, thereby improving the oil return control accuracy.

[0057] S200, determining that the actual oil amount in the compressor is less than the target preset oil amount, and controlling the air conditioner to execute the oil return strategy.

[0058] Specifically, when it is detected that the actual oil amount in the compressor is less than the target preset oil amount, it indicates that the compressor is short of oil, and at this time, the air conditioner is controlled to execute the oil return strategy and enter the oil return operation mode to return oil to reach the target preset oil amount.

[0059] Therefore, the oil return control method of the air conditioner provided by the embodiment of the present application can accurately and quickly determine whether the compressor is short of oil by directly detecting the oil amount in the compressor, thereby controlling whether the air conditioner enters the oil return operation, effectively improving the accuracy and efficiency of the oil return control, thereby ensuring the oil return effect of the compressor and achieving the purpose of protecting the compressor.

[0060] According to one embodiment of the present application, referring to Figure 2 As shown, the step S200 of determining that the actual oil amount in the compressor is less than the target preset oil amount and controlling the air conditioner to execute the oil return strategy specifically comprises:

[0061] S201, determining that the duration for which the actual oil amount in the compressor is continuously less than the target preset oil amount reaches a first preset duration, and controlling the air conditioner to execute the oil return strategy.

[0062] Specifically, if it is detected that the oil amount in the compressor is continuously lower than the target preset oil amount for a long time, the oil shortage in the compressor can be accurately determined, and at this time, the compressor is controlled to enter the oil return operation to return oil. In this way, the accuracy of the oil return control can be further improved.

[0063] According to one embodiment of the present application, referring to Figure 3 As shown, the step S200 of determining that the actual oil amount in the compressor is less than the target preset oil amount and controlling the air conditioner to execute the oil return strategy specifically comprises:

[0064] S202, detecting the change of the actual oil amount in the compressor.

[0065] S203, determine that the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, and in a second preset time length in the fluctuation process, the cumulative time length that the actual oil amount inside the compressor is less than the target preset oil amount reaches a third preset time length, and the air conditioner is controlled to execute an oil return strategy.

[0066] For example, the oil amount inside the compressor can be continuously detected by an oil amount sensor and then uploaded to a controller, and the controller analyzes and processes the data to obtain a corresponding change curve; when the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, that is, the fluctuation phenomenon greater than the target preset oil amount and less than the target preset oil amount occurs, and in 30 minutes in the fluctuation process, the time length that the actual oil amount inside the compressor is less than the target preset oil amount is obtained, if the cumulative time length that the oil amount inside the compressor is less than the target preset oil amount reaches a third preset time length, for example, 20 minutes, the oil deficiency inside the compressor can be accurately determined, and the compressor is controlled to enter oil return operation for oil return at this time. The second preset time length can be less than or equal to the fluctuation time length of the fluctuation phenomenon of the actual oil amount inside the compressor, for example, the second preset time length can be 30 minutes, and the fluctuation time length can be 1 hour.

[0067] The oil return control method of the air conditioner provided by the embodiment of the application can monitor the cumulative time length that the oil amount inside the compressor is less than the target preset oil amount when the oil amount inside the compressor fluctuates, and if the cumulative time length reaches a preset time length, it indicates that the time length that the oil amount is less than the target preset oil amount is relatively long, and the oil deficiency inside the compressor can be accurately determined at this time. In this way, misjudgment can be avoided, and the accuracy of oil return control is further improved.

[0068] According to one embodiment of the application, referring to Figure 4 The step S200 of determining that the actual oil amount inside the compressor is less than the target preset oil amount and controlling the air conditioner to execute an oil return strategy specifically includes:

[0069] S204, detecting the change of the actual oil amount inside the compressor.

[0070] S205, determining that the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, and in a fourth preset time length in the fluctuation process, the cumulative number of times that the actual oil amount inside the compressor is less than the target preset oil amount reaches a first preset number of times, and the air conditioner is controlled to execute an oil return strategy.

[0071] For example, the oil amount in the compressor can be continuously detected by an oil amount sensor and then uploaded to the controller, and the controller can analyze and process the data to obtain a corresponding change curve; when the actual oil amount in the compressor fluctuates up and down based on the target preset oil amount, that is, the fluctuation phenomenon greater than the target preset oil amount and less than the target preset oil amount occurs, and within 30 minutes in the fluctuation process, the number of times that the actual oil amount in the compressor is less than the target preset oil amount is obtained, if the cumulative number of times that the oil amount in the compressor is less than the target preset oil amount reaches a first preset number of times, for example, 10 times, the oil deficiency in the compressor can be accurately determined, and the compressor can be controlled to enter the oil return operation to return oil. The fourth preset time period can be less than or equal to the fluctuation time period of the fluctuation phenomenon of the actual oil amount in the compressor, for example, the fourth preset time period can be 30 minutes, and the fluctuation time period can be 1 hour.

[0072] The oil return control method of the air conditioner provided by the embodiment of the application can monitor the cumulative number of times that the actual oil amount in the compressor is less than the target preset oil amount when the oil amount in the compressor fluctuates, and if the cumulative number of times reaches a preset number of times, it indicates that the target preset oil amount is less than the target preset oil amount multiple times, which is not an accidental burst condition, and the oil deficiency in the compressor can be accurately determined at this time. Such a design can avoid misjudgment, thereby further improving the accuracy of oil return control.

[0073] According to one embodiment of the application, referring to Figure 5 The step S200 of determining that the actual oil amount in the compressor is less than the target preset oil amount and controlling the air conditioner to execute the oil return strategy specifically includes:

[0074] S206, detecting the change of the actual oil amount in the compressor.

[0075] S207, in the case that the actual oil amount in the compressor fluctuates up and down based on the target preset oil amount, dividing the fluctuation time period into a plurality of fifth preset time periods, and obtaining the oil amount difference between the maximum oil amount value and the minimum oil amount value of the actual oil amount in the compressor in each fifth preset time period.

[0076] S208, determining that the cumulative number of times that the oil amount difference reaches a preset value reaches a second preset number of times, and controlling the air conditioner to execute the oil return strategy.

[0077] For example, the oil amount in the compressor can be continuously detected by an oil amount sensor and then uploaded to a controller, and the controller can analyze and process the data to obtain a corresponding change curve; when the actual oil amount in the compressor fluctuates up and down based on the target preset oil amount, that is, the fluctuation is greater than the target preset oil amount or less than the target preset oil amount, the 1-hour fluctuation time can be divided into 6 10-minute periods, and in each 10-minute period, the oil amount difference between the maximum oil amount and the minimum oil amount of the actual oil amount in the compressor in the period is detected once. After six detections, if the cumulative number of times that the oil amount difference reaches the preset value reaches a second preset number of times, for example, four times, the lack of oil in the compressor can be accurately determined, and the compressor can be controlled to enter oil return operation for oil return.

[0078] The maximum oil amount can be understood as the highest value greater than the target preset oil amount, and correspondingly, the minimum oil amount can be understood as the lowest value less than the target preset oil amount.

[0079] The oil return control method of the air conditioner provided by the embodiment of the application can detect the oil amount difference in multiple periods when the oil amount in the compressor fluctuates, and if the cumulative number of times that the oil amount difference reaches the preset value reaches the preset number of times, it indicates that the oil amount in the compressor often fluctuates and is not an accidental situation. At this time, the lack of oil in the compressor can be accurately determined. Such a design can avoid misjudgment, thereby further improving the accuracy of oil return control.

[0080] Therefore, the above embodiment of the application can adapt to different operating conditions of the air conditioner by detecting different situations of the oil amount in the compressor, thereby effectively improving the control accuracy of oil return and increasing the application range.

[0081] According to an embodiment of the application, the step of controlling the air conditioner to execute the oil return strategy specifically includes: controlling the compressor to operate at a set frequency and the electronic expansion valve of the air conditioner to operate at a set opening degree for a sixth preset time period to reach the target preset oil amount.

[0082] For example, when the actual oil amount in the compressor is less than the target preset oil amount for a first preset time period, the average value of the actual oil amount in the compressor in the first preset time period can be obtained. The smaller the average value of the actual oil amount in the compressor, the higher the operating frequency of the compressor and the larger the opening degree of the electronic expansion valve, and the longer the oil return operating time, so as to quickly reach the target preset oil amount.

[0083] For example, when the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, in every fifth preset time length, the oil amount difference between the maximum oil amount value and the minimum oil amount value of the actual oil amount inside the compressor is obtained, if the cumulative number of times that the plurality of oil amount difference values reach the preset value reaches the second preset number of times, at this time, the average value of the plurality of oil amount difference values can be obtained, the smaller the average value, the higher the operating frequency of the compressor, and the larger the opening of the electronic expansion valve, and the longer the oil return operating time, so as to quickly reach the target preset oil amount.

[0084] Specifically, when the average value of the actual oil amount inside the compressor reaches a first set value, the compressor is controlled to operate at a first preset frequency, and the electronic expansion valve is controlled to operate at a first preset opening, and the oil return operating time is a first set time length;

[0085] When the average value of the actual oil amount inside the compressor reaches a second set value, the compressor is controlled to operate at a second preset frequency, and the electronic expansion valve is controlled to operate at a second preset opening, and the oil return operating time is a second set time length;

[0086] When the average value of the actual oil amount inside the compressor reaches a third set value, the compressor is controlled to operate at a third preset frequency, and the electronic expansion valve is controlled to operate at a third preset opening, and the oil return operating time is a third set time length;

[0087] Wherein, the first set value is less than the second set value, and the second set value is less than the third set value; the first preset frequency is less than the second preset frequency, and the second preset frequency is less than the third preset frequency; the first preset opening is less than the second preset opening, and the second preset opening is less than the third preset opening; the first set time length is less than the second set time length; and the second set time length is less than the third set time length.

[0088] Therefore, the embodiment of the present application can realize multi-gear precise control of air conditioner oil return, effectively improve the precision and efficiency of oil return control, so as to ensure the oil return effect of the compressor and achieve the purpose of protecting the compressor.

[0089] According to an embodiment of the present application, after the step of reaching the target preset oil amount, further comprising the steps of: controlling the air conditioner to exit the oil return strategy and restore the operating condition, that is, adjusting the operating frequency of the compressor and the opening of the electronic expansion valve to the operating frequency and opening required during heat exchange operation, so as to ensure the heat exchange effect of the air conditioner.

[0090] According to an embodiment of the present application, after the step of obtaining the actual oil amount inside the compressor of the air conditioner, further comprising: determining that the actual oil amount inside the compressor is greater than or equal to the target preset oil amount, and controlling the air conditioner to continue operating in the current operating condition.

[0091] If the detected oil amount inside the compressor is greater than or equal to the target preset oil amount, it indicates that the oil amount inside the compressor is normal, and at this time, the oil return operation is not needed, and the current heat exchange operation condition is continued to maintain the operation, thereby ensuring the heat exchange effect of the air conditioner.

[0092] The oil return control device of the air conditioner provided by the present application is described below, and the oil return control device of the air conditioner described below can be referred to in correspondence with the oil return control method of the air conditioner described above.

[0093] According to an embodiment of the present application, referring to Figure 6 The present application also provides an oil return control device of an air conditioner, mainly comprising an acquisition module 610 and a control module 620. The acquisition module 610 is configured to acquire the actual oil amount inside the compressor of the air conditioner when the air conditioner is started to operate. The control module 620 is configured to determine that the actual oil amount inside the compressor is less than a target preset oil amount, and control the air conditioner to perform an oil return strategy.

[0094] The oil return control device of the air conditioner provided by the present application can accurately and quickly determine whether the compressor is short of oil by the acquisition module 610 to detect the oil amount inside the compressor in real time, so as to control whether the air conditioner enters the oil return operation by the control module 620. In this way, the accuracy and efficiency of the oil return control can be effectively improved, thereby ensuring the oil return effect of the compressor and achieving the purpose of protecting the compressor.

[0095] According to an embodiment of the present application, referring to Figure 7 The present application also provides an air conditioner, which comprises a processor 710, a communications interface 720, a memory 730 and a communications bus 740. The processor 710, the communications interface 720 and the memory 730 can communicate with each other through the communications bus 740. The processor 710 can call the logic instructions in the memory 730 to execute the oil return control method of the air conditioner, which comprises: acquiring the actual oil amount inside the compressor of the air conditioner when the air conditioner is started to operate; and determining that the actual oil amount inside the compressor is less than a target preset oil amount, and controlling the air conditioner to perform an oil return strategy.

[0096] In addition, the logic instructions in the memory 730 described above can be implemented in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM, Read-Only Memory), a random access memory (RAM, Random Access Memory), a magnetic disk or an optical disk, and various media that can store program codes.

[0097] In another aspect, the present application also provides a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program is executed by a processor, so that the computer can execute the oil return control method of the air conditioner provided by the above-mentioned methods. The method comprises: in the case that the air conditioner is started to operate, acquiring the actual oil amount inside the compressor of the air conditioner; determining that the actual oil amount inside the compressor is less than a target preset oil amount, and controlling the air conditioner to execute an oil return strategy.

[0098] In another aspect, the present application also provides a computer program product, which comprises a computer program, the computer program can be stored on a non-transitory computer readable storage medium, and the computer program is executed by a processor, so that the computer can execute the oil return control method of the air conditioner provided by the above-mentioned methods. The method comprises: in the case that the air conditioner is started to operate, acquiring the actual oil amount inside the compressor of the air conditioner; determining that the actual oil amount inside the compressor is less than a target preset oil amount, and controlling the air conditioner to execute an oil return strategy.

[0099] The device embodiments described above are only schematic, wherein the units illustrated as separate components can or can not be physically separated, and the components illustrated as units can or can not be physical units, i.e., they can be located in one place, or distributed on a plurality of network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment. Those skilled in the art can understand and implement without creative labor.

[0100] Those skilled in the art can clearly understand the technical solutions of the various embodiments from the above description of the embodiments, and the various embodiments can be implemented by means of software with the necessary general hardware platforms, and of course, can also be implemented by hardware. Based on such understanding, the above technical solutions, essentially or in other words, the part of the prior art that makes a contribution, can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, and the like, and includes a number of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0101] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An oil return control method of an air conditioner, characterized by, The method comprises the following steps: In the case that the air conditioner is started to run, the actual oil amount inside the compressor of the air conditioner is acquired; It is determined that the actual oil amount inside the compressor is less than the target preset oil amount, and the air conditioner is controlled to execute an oil return strategy; The step of determining that the actual oil amount inside the compressor is less than the target preset oil amount and controlling the air conditioner to execute the oil return strategy specifically comprises the following steps: The change of the actual oil amount inside the compressor is detected; It is determined that the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, and the cumulative time length during which the actual oil amount inside the compressor is less than the target preset oil amount in a second preset time length in the fluctuation process reaches a third preset time length, and the air conditioner is controlled to execute the oil return strategy; Or, it is determined that the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, and the cumulative number of times during which the actual oil amount inside the compressor is less than the target preset oil amount in a fourth preset time length in the fluctuation process reaches a first preset number of times, and the air conditioner is controlled to execute the oil return strategy; Or, in the case that the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, the time length of the fluctuation is divided into a plurality of fifth preset time lengths, and the oil amount difference between the maximum oil amount value and the minimum oil amount value of the actual oil amount inside the compressor is acquired in each fifth preset time length; it is determined that the cumulative number of times during which the oil amount difference reaches a preset value reaches a second preset number of times, and the air conditioner is controlled to execute the oil return strategy.

2. The oil return control method of the air conditioner according to claim 1, wherein The step of controlling the air conditioner to execute the oil return strategy specifically comprises the following steps: The compressor is controlled to run at a set frequency and the electronic expansion valve of the air conditioner is controlled to run at a set opening for a sixth preset time length, so as to reach the target preset oil amount.

3. The oil return control method of the air conditioner according to claim 2, wherein After the step of reaching the target preset oil amount, the following step is further included: The air conditioner is controlled to exit the oil return strategy and restore the running condition.

4. The oil return control method of the air conditioner according to claim 1, wherein After the step of acquiring the actual oil amount inside the compressor of the air conditioner, the following step is further included: It is determined that the actual oil amount inside the compressor is greater than or equal to the target preset oil amount, and the air conditioner is controlled to continue running in the current running condition.

5. An oil return control device for an air conditioner, characterized by comprising: The method comprises the following steps: An acquisition module is configured to acquire the actual oil amount inside the compressor of the air conditioner in the case that the air conditioner is started to run; A control module is configured to determine that the actual oil amount inside the compressor is less than the target preset oil amount, and control the air conditioner to execute an oil return strategy; The step of determining that the actual oil amount inside the compressor is less than the target preset oil amount and controlling the air conditioner to execute the oil return strategy specifically comprises the following steps: The change of the actual oil amount inside the compressor is detected; It is determined that the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, and the cumulative time length during which the actual oil amount inside the compressor is less than the target preset oil amount in a second preset time length in the fluctuation process reaches a third preset time length, and the air conditioner is controlled to execute the oil return strategy; Or, the actual oil amount inside the compressor is determined to fluctuate up and down based on the target preset oil amount, and the cumulative number of times that the actual oil amount inside the compressor is less than the target preset oil amount within a fourth preset time length in the fluctuation process reaches a first preset number of times, the air conditioner is controlled to execute an oil return strategy. Or, in the case that the actual oil amount inside the compressor fluctuates up and down based on the target preset oil amount, the time length of the fluctuation is divided into a plurality of fifth preset time lengths, and within each fifth preset time length, an oil amount difference value of a maximum oil amount value and a minimum oil amount value of the actual oil amount inside the compressor is obtained; the cumulative number of times that the oil amount difference value reaches a preset value reaches a second preset number of times, the air conditioner is controlled to execute an oil return strategy.

6. An air conditioner comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, The processor implements the oil return control method of the air conditioner in any one of claims 1-4 when executing the program.

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