Methods, equipment and computer-readable storage media for oil return control of air conditioners

Abstract

This invention discloses a method, device, and computer-readable storage medium for controlling oil return in an air conditioner. The method includes: determining the runtime between the time corresponding to the first operation at a frequency exceeding a preset frequency threshold and the current time, and the maximum non-oil return duration corresponding to the current time; and performing oil return control based on the runtime and the maximum non-oil return duration. This invention avoids unnecessary oil return in the air conditioner, improving the comfort experience of using the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an oil return control method, device and computer-readable storage medium for an air conditioner. Background Technology

[0002] During operation, prolonged low-frequency operation of the compressor will gradually reduce the amount of oil inside the compressor. This can easily lead to problems such as overheating. Therefore, when the air conditioner operates at low frequency for a period of time, it will return oil based on a preset oil return frequency. However, this can easily result in prolonged, significant, or unnecessary oil return. Summary of the Invention

[0003] The main objective of this invention is to provide an oil return control method, device, and computer-readable storage medium for an air conditioner, aiming to solve the problem of how to avoid unnecessary oil return.

[0004] To achieve the above objectives, the present invention provides an oil return control method for an air conditioner, the oil return control method for the air conditioner comprising the following steps:

[0005] Determine the runtime between the time when the frequency first exceeds the preset frequency threshold and the current time, as well as the maximum non-return time corresponding to the current time;

[0006] Oil return control is performed based on the runtime and the maximum non-oil return time.

[0007] Optionally, the step of controlling the return oil flow based on the running time and the maximum non-return oil flow duration includes:

[0008] The return oil duration is determined based on the running time and the maximum non-return oil duration.

[0009] The compressor of the air conditioner is controlled to return oil according to the oil return duration.

[0010] Optionally, the step of determining the return oil duration based on the running time and the maximum non-return oil duration includes:

[0011] The first return oil coefficient is determined based on the running time and the maximum non-return oil time.

[0012] The return oil duration is determined by multiplying the first return oil coefficient and the preset return oil duration.

[0013] Optionally, the step of controlling the return oil flow based on the running time and the maximum non-return oil flow duration includes:

[0014] The return oil frequency is determined based on the running time and the maximum non-return oil time.

[0015] The compressor of the air conditioner is controlled to return oil according to the oil return frequency.

[0016] Optionally, the step of determining the return oil frequency based on the running time and the maximum non-return oil duration includes:

[0017] The second return oil coefficient is determined based on the running time and the maximum non-return oil time.

[0018] The return oil frequency is determined by multiplying the second return oil coefficient and the preset return oil frequency.

[0019] Optionally, the step of controlling the return oil flow based on the running time and the maximum non-return oil flow duration includes:

[0020] Based on the relationship between the running time and the maximum non-oil return time, it is determined whether to control the air conditioner to return oil.

[0021] Optionally, the step of determining whether to control the air conditioner to perform the oil return process based on the relationship between the running time and the maximum non-oil return time includes:

[0022] When the running time exceeds the limit of no oil return time, control the air conditioner to return oil.

[0023] When the running time is less than or equal to the limit of no oil return time, and after the air conditioner has run for the running time, return to the step of determining the running time between the time corresponding to the first time the frequency exceeds the preset frequency threshold and the current time, and the limit of no oil return time corresponding to the current time.

[0024] Optionally, the step of controlling the return oil flow based on the running time and the maximum non-return oil flow duration includes:

[0025] The return oil frequency and return oil duration are determined based on the running time and the maximum non-return oil duration.

[0026] The compressor of the air conditioner is controlled to return oil according to the oil return frequency and the oil return duration.

[0027] Optionally, the step of determining the return oil frequency and return oil duration based on the running time and the maximum non-return oil duration includes:

[0028] The third return oil coefficient is determined based on the running time and the maximum non-return oil time.

[0029] Obtain the target oil return volume of the air conditioner;

[0030] The return oil duration and the return oil frequency are determined by the third return oil coefficient and the return oil target amount.

[0031] Optionally, the steps of determining the runtime between the time corresponding to the first operation at a frequency exceeding a preset frequency threshold and the current time, and the maximum non-return time corresponding to the current time, include:

[0032] Historical data is input into the frequency prediction model. The historical data includes environmental conditions, future weather information, air conditioning operating conditions, and user settings.

[0033] Obtain the runtime and the maximum non-return time output by the frequency prediction model.

[0034] Optionally, before the step of inputting historical data into the frequency prediction model, the method further includes:

[0035] Acquire training data, which includes the environmental conditions during air conditioner operation, future weather information, air conditioner operating conditions, and user settings.

[0036] The neural network model is trained based on the training data to obtain a frequency prediction model.

[0037] Optionally, the method further includes:

[0038] Obtain the operating time of the air conditioner;

[0039] When the air conditioner runs for longer than a preset time threshold, the indoor fan of the air conditioner will stop running and the operating mode will be switched to the oil return control mode.

[0040] The operating time between the time corresponding to the first operation at a frequency exceeding the preset frequency threshold and the current time is determined based on the oil return control mode, as well as the maximum non-oil return time corresponding to the current time.

[0041] Oil return control is performed based on the runtime and the maximum non-oil return time.

[0042] To achieve the above objectives, the present invention also provides an oil return control device for an air conditioner, the oil return control device for an air conditioner including a memory, a processor, and an oil return control program for an air conditioner stored in the memory and executable on the processor, wherein when the oil return control program for an air conditioner is executed by the processor, it implements the various steps of the oil return control method for an air conditioner as described above.

[0043] To achieve the above objectives, the present invention also provides a computer-readable storage medium storing an oil return control program for an air conditioner, wherein the oil return control program for the air conditioner, when executed by a processor, implements the various steps of the oil return control method for the air conditioner as described above.

[0044] This invention provides an oil return control method, device, and computer-readable storage medium for an air conditioner. It determines the runtime between the moment when the frequency first exceeds a preset threshold and the current moment, as well as the maximum oil return duration corresponding to the current moment. Based on the runtime and the maximum oil return duration, oil return control is performed. This avoids the gradual decrease in oil volume within the compressor during prolonged low-frequency operation, which triggers high-frequency oil return. It also avoids unnecessary oil return, improving the comfort experience of using the air conditioner. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the hardware structure of the oil return control device for an air conditioner according to an embodiment of the present invention;

[0046] Figure 2 This is a flowchart illustrating the first embodiment of the oil return control method for the air conditioner of the present invention.

[0047] Figure 3 This is a detailed flowchart of step S20 of the second embodiment of the oil return control method for the air conditioner of the present invention;

[0048] Figure 4 This is a detailed flowchart of step S20 of the third embodiment of the oil return control method for the air conditioner of the present invention.

[0049] Figure 5 This is a flowchart illustrating the fourth embodiment of the oil return control method for the air conditioner of the present invention.

[0050] Figure 6 This is a detailed flowchart of step S20 of the fifth embodiment of the oil return control method for the air conditioner of the present invention.

[0051] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0052] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0053] The main solution of this invention is to determine the running time between the time when the frequency of operation first exceeds the preset frequency threshold and the current time, and the maximum oil return time corresponding to the current time; and to control oil return based on the running time and the maximum oil return time, so as to avoid the oil volume in the compressor gradually decreasing during long-term low-frequency operation, which would trigger high-frequency operation oil return, and at the same time avoid unnecessary oil return, thereby improving the comfort experience of using the air conditioner.

[0054] As one implementation method, the oil return control device of the air conditioner can be as follows: Figure 1 As shown.

[0055] The embodiments of the present invention relate to an oil return control device for an air conditioner, which includes: a processor 101, such as a CPU, a memory 102, and a communication bus 103. The communication bus 103 is used to enable communication between these components.

[0056] Memory 102 can be high-speed RAM or stable memory (non-volatile memory), such as disk storage. Figure 1 As shown, the memory 102, which is a computer-readable storage medium, may include an air conditioner oil return control program; and the processor 101 can be used to call the air conditioner oil return control program stored in the memory 102 and perform the following operations:

[0057] Determine the runtime between the time when the frequency first exceeds the preset frequency threshold and the current time, as well as the maximum non-return time corresponding to the current time;

[0058] Oil return control is performed based on the runtime and the maximum non-oil return time.

[0059] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0060] The return oil duration is determined based on the running time and the maximum non-return oil duration.

[0061] The compressor of the air conditioner is controlled to return oil according to the oil return duration.

[0062] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0063] The first return oil coefficient is determined based on the running time and the maximum non-return oil time.

[0064] The return oil duration is determined by multiplying the first return oil coefficient and the preset return oil duration.

[0065] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0066] The return oil frequency is determined based on the running time and the maximum non-return oil time.

[0067] The compressor of the air conditioner is controlled to return oil according to the oil return frequency.

[0068] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0069] The second return oil coefficient is determined based on the running time and the maximum non-return oil time.

[0070] The return oil frequency is determined by multiplying the second return oil coefficient and the preset return oil frequency.

[0071] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0072] Based on the relationship between the running time and the maximum non-oil return time, it is determined whether to control the air conditioner to return oil.

[0073] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0074] When the running time exceeds the limit of no oil return time, control the air conditioner to return oil.

[0075] When the running time is less than or equal to the limit of no oil return time, and after the air conditioner has run for the running time, return to the step of determining the running time between the time corresponding to the first time the frequency exceeds the preset frequency threshold and the current time, and the limit of no oil return time corresponding to the current time.

[0076] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0077] The return oil frequency and return oil duration are determined based on the running time and the maximum non-return oil duration.

[0078] The compressor of the air conditioner is controlled to return oil according to the oil return frequency and the oil return duration.

[0079] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0080] The third return oil coefficient is determined based on the running time and the maximum non-return oil time.

[0081] Obtain the target oil return volume of the air conditioner;

[0082] The return oil duration and the return oil frequency are determined by the third return oil coefficient and the return oil target amount.

[0083] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0084] Historical data is input into the frequency prediction model. The historical data includes environmental conditions, future weather information, air conditioning operating conditions, and user settings.

[0085] Obtain the runtime and the maximum non-return time output by the frequency prediction model.

[0086] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0087] Acquire training data, which includes the environmental conditions during air conditioner operation, future weather information, air conditioner operating conditions, and user settings.

[0088] The neural network model is trained based on the training data to obtain a frequency prediction model.

[0089] Optionally, the processor 101 can be used to call the air conditioner's oil return control program stored in the memory 102 and perform the following operations:

[0090] Obtain the operating time of the air conditioner;

[0091] When the air conditioner runs for longer than a preset time threshold, the indoor fan of the air conditioner will stop running and the operating mode will be switched to the oil return control mode.

[0092] The operating time between the time corresponding to the first operation at a frequency exceeding the preset frequency threshold and the current time is determined based on the oil return control mode, as well as the maximum non-oil return time corresponding to the current time.

[0093] Oil return control is performed based on the runtime and the maximum non-oil return time.

[0094] Based on the hardware architecture of the oil return control device for the air conditioner described above, an embodiment of the oil return control method for the air conditioner of the present invention is proposed.

[0095] Reference Figure 2 , Figure 2 This is a first embodiment of the oil return control method for an air conditioner according to the present invention. The oil return control method for the air conditioner includes the following steps:

[0096] Step S10: Determine the running time between the time corresponding to the first operation at a frequency greater than the preset frequency threshold and the current time, as well as the maximum non-return oil time corresponding to the current time.

[0097] Optionally, the frequency is the compressor frequency of the air conditioner, and the preset frequency threshold can be 50 Hz. Optionally, the running time is the time interval between the time t1 when the air conditioner first operates at a frequency greater than the preset frequency threshold and the current time t0, where the running time = t1 - t0.

[0098] Optionally, the maximum non-oil return time t2 is the longest time the air conditioner can operate without oil return. Optionally, the maximum non-oil return time t2 can be determined based on the air conditioner's compressor frequency and the duration of operation at that frequency. If the air conditioner operates beyond the maximum non-oil return time t2, the oil level in the compressor may gradually decrease due to prolonged low-frequency operation, potentially leading to overheating. In this situation, the air conditioner will trigger high-frequency operation to return oil, causing significant discomfort.

[0099] Optionally, the indoor ambient temperature and the target indoor ambient temperature set by the user are obtained; the temperature difference between the target indoor ambient temperature and the indoor ambient temperature is determined; based on the cumulative oil return time and the temperature difference, the running time between the time t1 corresponding to the first frequency operation exceeding the preset frequency threshold and the current time t0 is determined, as well as the extreme non-oil return time t2 corresponding to the current time t0.

[0100] Optionally, before step S10, the method further includes: inputting historical data into the frequency prediction model, wherein the historical data includes environmental conditions, future weather information, air conditioning operating conditions and user setting information; obtaining the running time between the time t1 corresponding to the first frequency operation exceeding the preset frequency threshold output by the frequency prediction model and the current time t0, and the extreme non-return oil time t2 corresponding to the current time t0.

[0101] Optionally, the training process of the frequency prediction model includes: acquiring training data, which includes the environmental conditions during air conditioner operation, future weather information, air conditioner operating conditions, and user settings; and training a neural network model based on the training data to obtain the frequency prediction model. The training data is used as input parameters, and the operating time and / or the maximum non-return oil time are used as output parameters.

[0102] Optionally, environmental conditions include indoor ambient temperature, outdoor ambient temperature, etc.; future weather information includes indoor ambient temperature and outdoor ambient temperature within a future time period, etc.; air conditioning operating conditions include operating conditions in heating mode and operating conditions in cooling mode, etc.; and user setting information includes set temperature and set humidity, etc.

[0103] Step S20: Perform oil return control based on the running time and the maximum non-oil return time.

[0104] Optionally, when the running time t1 is greater than the maximum non-return oil time t2, the return oil time is determined based on the running time and the maximum non-return oil time, and the air conditioner is controlled to return oil for the specified return oil time. Optionally, a first return oil coefficient is determined based on the ratio of the running time to the maximum non-return oil time, and the return oil time is determined based on the product of the first return oil coefficient and the preset return oil time.

[0105] Optionally, when the running time t1 is greater than the maximum non-return oil time t2, the oil return frequency is determined based on the running time and the maximum non-return oil time, and the air conditioner is controlled to return oil at the oil return frequency. Optionally, a second oil return coefficient is determined based on the ratio of the running time to the maximum non-return oil time, and the oil return frequency is determined based on the product of the second oil return coefficient and the preset oil return frequency.

[0106] Optionally, when the running time t1 is greater than the maximum non-return oil time t2, the return oil frequency and return oil duration are determined based on the running time and the maximum non-return oil time, and the air conditioner is controlled to return oil at the specified frequency and duration. Optionally, a third return oil coefficient is determined based on the ratio of the running time to the maximum non-return oil time; the return oil duration is determined based on the product of the third return oil coefficient and the preset return oil time; and the return oil frequency is determined based on the product of the third return oil coefficient and the preset return oil frequency.

[0107] Optionally, when the running time t1 is less than or equal to the maximum non-oil return time t2, the air conditioner is controlled not to return oil.

[0108] Optionally, the air conditioner's running time T is obtained; when the air conditioner's running time T is greater than a preset duration threshold, the indoor fan of the air conditioner is controlled to stop running, and the working mode is switched to the oil return control mode; the running time between the time t1 corresponding to the first frequency operation exceeding the preset frequency threshold and the current time t0 is determined according to the oil return control mode, as well as the extreme non-oil return time t2 corresponding to the current time t0; oil return control is performed according to the running time t1 and the extreme non-oil return time t2.

[0109] Optionally, the steps for controlling oil return include: if the air conditioner meets the preset oil return conditions, then controlling the air conditioner to return oil; optionally, when the compressor frequency is less than a preset frequency threshold and the duration is greater than a preset duration threshold, it is determined that the air conditioner meets the preset oil return conditions. Optionally, when the compressor frequency is greater than or equal to the preset frequency threshold, it is determined that the air conditioner does not meet the preset oil return conditions. Optionally, when the compressor frequency is less than the preset frequency threshold and the duration is less than or equal to the preset duration threshold, it is determined that the air conditioner does not meet the preset oil return conditions. Optionally, the cumulative oil return time of the air conditioner is obtained, wherein the cumulative oil return time represents the cumulative time the air conditioner has run in a compressor oil shortage state; when the cumulative oil return time is greater than or equal to the preset duration, it is determined that the air conditioner meets the preset oil return conditions; when the cumulative oil return time is less than the preset duration, it is determined that the air conditioner does not meet the preset oil return conditions.

[0110] In the technical solution of this embodiment, the running time between the time corresponding to the first operation at a frequency greater than a preset frequency threshold and the current time is determined, as well as the maximum oil return time corresponding to the current time; oil return control is performed based on the running time and the maximum oil return time, which avoids the oil volume in the compressor gradually decreasing during long-term low-frequency operation, triggering high-frequency operation oil return, and at the same time avoids unnecessary oil return, thus improving the comfort experience of using the air conditioner.

[0111] Reference Figure 3 , Figure 3 This is a second embodiment of the oil return control method for an air conditioner of the present invention. Based on the first embodiment, step S20 includes:

[0112] Step S21: Determine the return oil duration based on the running time and the maximum non-return oil duration;

[0113] Step S22: Control the compressor of the air conditioner to return oil according to the oil return duration.

[0114] Optionally, the preset return oil duration can be the return oil duration during the normal return oil process.

[0115] Optionally, the oil return duration is determined based on the running time t1 and the maximum non-oil return duration t2. Optionally, the oil return duration corresponding to the running time and the maximum non-oil return duration is determined based on a mapping table. The mapping table can be determined based on the historical oil return data of the air conditioner.

[0116] Optionally, the first return oil coefficient is determined based on the running time and the maximum non-return oil time, wherein the first return oil coefficient is shown in the following formula:

[0117] r = t1 / t2;

[0118] Where r represents the first return oil coefficient, t1 represents the running time, and t2 represents the extreme non-return oil time.

[0119] Optionally, the return oil duration is determined based on the product of the first return oil coefficient and the preset return oil duration, as shown in the following formula:

[0120] t = r × t_h;

[0121] Where t represents the oil return time, t_h represents the preset oil return time, and r represents the first oil return coefficient.

[0122] For example, if the running time is t1 = 30 min and the maximum non-return time is t2 = 40 min, then the first return time coefficient is r = t1 / t2 = 3 / 4. The preset return time in the normal return process is 12 min. At this time, the redefined return time is 9 min.

[0123] When executing the return oil process based on the return oil duration, if the first return oil coefficient r is greater than 1 (i.e., t1 is greater than t2), it indicates that the high-frequency operation with a frequency greater than the preset frequency threshold will only occur after the extreme non-return oil duration t2. Therefore, the return oil duration needs to be increased. The larger r is, the later the high-frequency operation with a frequency greater than the preset frequency threshold occurs after the extreme non-return oil duration; therefore, the return oil duration needs to be increased further.

[0124] If the first return-oil coefficient r is less than 1, i.e., t1 is less than t2, it means that high-frequency operation, exceeding the preset frequency threshold, will occur before the maximum non-return-oil duration. High-frequency operation can achieve the return-oil effect, so extensive return-oil operation is unnecessary; therefore, the return-oil duration needs to be reduced. The smaller r is, the earlier the high-frequency operation, exceeding the preset frequency threshold, occurs before the maximum non-return-oil duration. Therefore, the return-oil duration needs to be reduced further to avoid compromising energy efficiency and comfort.

[0125] If the first return oil coefficient r equals 1, that is, t1 equals t2, it means that the moment of high-frequency operation with a frequency greater than the preset frequency threshold for the first time is the moment corresponding to the limit of no return oil duration. At this time, there is no need to change the return oil duration.

[0126] In the technical solution of this embodiment, the oil return duration is determined based on the running time and the maximum non-oil return duration; the compressor of the air conditioner is controlled to return oil according to the oil return duration. The air conditioner is controlled to return oil based on the oil return duration, instead of forcing high-frequency operation for a fixed duration, thus avoiding long-term, large-amplitude, or unnecessary oil return, improving the accuracy of oil return control and enhancing the comfort experience of using the air conditioner.

[0127] Reference Figure 4 , Figure 4 In a third embodiment of the oil return control method for an air conditioner of the present invention, based on the first or second embodiment, step S20 includes:

[0128] Step S23: Determine the return oil frequency based on the running time and the maximum non-return oil time.

[0129] Step S24: Control the compressor of the air conditioner to return oil according to the oil return frequency.

[0130] Optionally, the preset return oil frequency can be the return oil frequency during the normal return oil process.

[0131] Optionally, the oil return frequency is determined based on the running time t1 and the extreme non-oil return time t2. Optionally, the oil return frequency corresponding to the running time t1 and the extreme non-oil return time t2 is determined based on a mapping table. The mapping table can be determined based on the historical oil return data of the air conditioner.

[0132] Optionally, a second return oil coefficient is determined based on the running time and the maximum non-return oil time, wherein the second return oil coefficient is shown in the following formula:

[0133] r = t1 / t2;

[0134] Where r represents the second return oil coefficient, t1 represents the running time, and t2 represents the extreme non-return oil time.

[0135] Optionally, the return oil frequency is determined based on the product of the second return oil coefficient and the preset return oil frequency, as shown in the following formula:

[0136] H = r × H z_h

[0137] Where H represents the return oil frequency, H z_h This indicates the preset return oil frequency, and r represents the second return oil coefficient.

[0138] When executing the return oil process based on the return oil frequency, if the second return oil coefficient r is greater than 1, i.e., t1 is greater than t2, it indicates that the high-frequency operation exceeding the preset frequency threshold will only occur after the extreme non-return oil time. Therefore, the return oil frequency needs to be increased. The larger r is, the later the high-frequency operation exceeding the preset frequency threshold occurs after the extreme non-return oil time. Therefore, more return oil frequencies need to be added.

[0139] If the second return oil coefficient r is less than 1, i.e., t1 is less than t2, it means that the first high-frequency operation exceeding the preset frequency threshold will occur before the maximum non-return oil duration. High-frequency operation can achieve the return oil effect, so there is no need for extensive return oil operation; therefore, the return oil frequency needs to be reduced. The smaller r is, the earlier the first high-frequency operation exceeding the preset frequency threshold occurs before the maximum non-return oil duration; therefore, the return oil frequency needs to be reduced even further.

[0140] If the second return oil coefficient r equals 1, that is, t1 equals t2, it means that the moment when the high-frequency operation first exceeds the preset frequency threshold is the moment corresponding to the limit of no return oil duration, and there is no need to change the return oil frequency at this time.

[0141] For example, if the running time t1 is 30 minutes and the maximum non-return time threshold t2 is 40 minutes, then the second return coefficient is r = t1 / t2 = 3 / 4. The preset return frequency in the normal return process is 60 Hz. At this time, the redefined return frequency is 45 Hz.

[0142] In this embodiment, the oil return frequency is determined based on the running time and the maximum non-oil return duration; the air conditioner compressor is controlled to return oil according to the oil return frequency. Controlling the air conditioner's oil return based on the oil return frequency, rather than forcing high-frequency operation for a fixed duration, avoids prolonged, large-amplitude, or unnecessary oil return, improving the accuracy of oil return control and enhancing the comfort experience of using the air conditioner.

[0143] Reference Figure 5 , Figure 5 In the fourth embodiment of the oil return control method for the air conditioner of the present invention, based on any one of the first to third embodiments, step S20 includes:

[0144] Step S25: Based on the relationship between the running time and the maximum non-oil return time, determine whether to control the air conditioner to return oil.

[0145] Optionally, when the running time exceeds the limit of no oil return time, it indicates that high-frequency operation occurs after the limit of no oil return time, and at this time, it is necessary to control the air conditioner to return oil.

[0146] Optionally, when the running time is less than or equal to the limit of no oil return time, it means that the high-frequency operation with a frequency greater than the preset frequency threshold occurs before the limit of no oil return time. The high-frequency operation with a frequency greater than the preset frequency threshold can achieve the oil return effect. Therefore, in order to avoid unnecessary oil return, the oil return process does not need to be executed at this time. After the air conditioner runs for the specified running time, the process returns to step S10.

[0147] For example, if the runtime is t1 = 50 minutes and the maximum non-return time is t2 = 40 minutes, then the runtime t1 is greater than the maximum non-return time t2, and no return is performed. If the runtime is t1 = 30 minutes and the maximum non-return time is t2 = 40 minutes, then the runtime t1 is greater than the maximum non-return time t2, and the return process is executed.

[0148] In the technical solution of this embodiment, the decision on whether to control the air conditioner to return oil is determined based on the relationship between the running time and the maximum non-oil return time, thereby avoiding prolonged, large-scale, or unnecessary oil return and improving the comfort experience of using the air conditioner.

[0149] Reference Figure 6 , Figure 6 This is a fifth embodiment of the oil return control method for an air conditioner of the present invention. Based on any one of the first to fourth embodiments, step S20 includes:

[0150] Step S26: Determine the return oil frequency and return oil duration based on the running time and the maximum non-return oil duration;

[0151] Step S27: Control the compressor of the air conditioner to return oil according to the oil return frequency and the oil return duration.

[0152] Optionally, the oil return duration and frequency are determined based on the operating time and the maximum non-oil return duration. Optionally, the oil return duration and frequency corresponding to the operating time and the maximum non-oil return duration are determined based on a mapping table. The mapping table can be determined based on the historical oil return data of the air conditioner.

[0153] Optionally, step S26 includes: determining a third oil return coefficient based on the running time and the maximum non-oil return time; determining the target oil return amount of the air conditioner, wherein the target oil return amount is the amount of oil returned in one oil return process, and the target oil return amount can be a set value; and determining the oil return duration and oil return frequency based on the third oil return coefficient and the target oil return amount. Specifically, the oil return amount is determined by multiplying the third oil return coefficient and the target oil return amount, and the oil return duration and frequency are adjusted based on the oil return amount. When the third oil return coefficient is less than 1, the oil return amount decreases, and both the oil return duration and frequency are reduced based on the oil return amount. When the third oil return coefficient is greater than 1, the oil return amount increases, and both the oil return duration and frequency are increased based on the oil return amount. Controlling the air conditioner's oil return based on the oil return duration and frequency avoids prolonged, large-scale, or unnecessary oil return, improving the accuracy of oil return control and enhancing the comfort experience of using the air conditioner.

[0154] Optionally, the third return oil coefficient is determined based on the running time and the maximum non-return oil time, wherein the third return oil coefficient is shown in the following formula:

[0155] r = t1 / t2;

[0156] Where r represents the third return oil coefficient, t1 represents the running time, and t2 represents the extreme non-return oil time.

[0157] Optionally, the return oil duration is determined based on the product of the third return oil coefficient and the preset return oil duration; the return oil frequency is determined based on the product of the third return oil coefficient and the preset return oil frequency. Optionally, the preset return oil duration can be the return oil duration during a normal return oil process, and the preset return oil frequency can be the return oil frequency during a normal return oil process.

[0158] In this embodiment, the oil return frequency and duration are determined based on the running time and the maximum non-oil return duration. The compressor of the air conditioner is controlled to return oil according to the oil return frequency and duration. Controlling the air conditioner's oil return based on the oil return frequency and duration avoids forced high-frequency operation for a fixed duration, preventing prolonged, large-scale, or unnecessary oil return, thus improving the accuracy of oil return control and enhancing the comfort of using the air conditioner.

[0159] The present invention also provides an oil return control device for an air conditioner, the oil return control device for an air conditioner including a memory, a processor, and an oil return control program for an air conditioner stored in the memory and executable on the processor. When the oil return control program for an air conditioner is executed by the processor, it implements the various steps of the oil return control method for an air conditioner as described in the above embodiments.

[0160] The present invention also provides a computer-readable storage medium storing an oil return control program for an air conditioner. When the oil return control program is executed by a processor, it implements the various steps of the oil return control method for an air conditioner as described in the above embodiments.

[0161] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0162] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, system, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, system, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, system, article, or apparatus that includes that element.

[0163] Through the above description of the embodiments, those skilled in the art can clearly understand that the systems described in the embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, and includes several instructions to cause a terminal device (which may be a mobile phone, computer, parking management device, air conditioner, or network device, etc.) to execute the systems described in the various embodiments of the present invention.

[0164] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A method for controlling oil return in an air conditioner, characterized in that, The oil return control method for the air conditioner includes: Determine the runtime between the time when the frequency first exceeds the preset frequency threshold and the current time, as well as the maximum non-return time corresponding to the current time; Oil return control is performed based on the running time and the maximum non-oil return time. If oil return control is based on the oil return time, a first oil return coefficient is determined based on the running time and the maximum non-oil return time. The oil return time is determined based on the product of the first oil return coefficient and the preset oil return time. The compressor of the air conditioner is controlled to return oil according to the oil return time.

2. The oil return control method for an air conditioner as described in claim 1, characterized in that, The step of controlling oil return based on the running time and the maximum non-return time includes: The return oil frequency is determined based on the running time and the maximum non-return oil time. The compressor of the air conditioner is controlled to return oil according to the oil return frequency.

3. The oil return control method for an air conditioner as described in claim 2, characterized in that, The step of determining the return oil frequency based on the running time and the maximum non-return oil time includes: The second return oil coefficient is determined based on the running time and the maximum non-return oil time. The return oil frequency is determined by multiplying the second return oil coefficient and the preset return oil frequency.

4. The oil return control method for an air conditioner as described in claim 1, characterized in that, The step of controlling oil return based on the running time and the maximum non-return time includes: Based on the relationship between the running time and the maximum non-oil return time, it is determined whether to control the air conditioner to return oil.

5. The oil return control method for an air conditioner as described in claim 4, characterized in that, The step of determining whether to control the air conditioner to perform the oil return process based on the relationship between the running time and the maximum non-oil return time includes: When the running time exceeds the limit of no oil return time, control the air conditioner to return oil. When the running time is less than or equal to the limit of no oil return time, and after the air conditioner has run for the running time, return to the step of determining the running time between the time corresponding to the first time the frequency exceeds the preset frequency threshold and the current time, and the limit of no oil return time corresponding to the current time.

6. The oil return control method for an air conditioner as described in claim 1, characterized in that, The step of controlling oil return based on the running time and the maximum non-return time includes: The return oil frequency and return oil duration are determined based on the running time and the maximum non-return oil duration. The compressor of the air conditioner is controlled to return oil according to the oil return frequency and the oil return duration.

7. The oil return control method for an air conditioner as described in claim 6, characterized in that, The step of determining the return frequency and return duration based on the running time and the maximum non-return time includes: The third return oil coefficient is determined based on the running time and the maximum non-return oil time. Obtain the target oil return volume of the air conditioner; The return oil duration and the return oil frequency are determined by the third return oil coefficient and the return oil target amount.

8. The oil return control method for an air conditioner as described in claim 1, characterized in that, The steps of determining the runtime between the time corresponding to the first operation at a frequency exceeding a preset frequency threshold and the current time, and the maximum non-return time corresponding to the current time, include: Historical data is input into the frequency prediction model. The historical data includes environmental conditions, future weather information, air conditioning operating conditions, and user settings. Obtain the runtime and the maximum non-return time output by the frequency prediction model.

9. The oil return control method for an air conditioner as described in claim 8, characterized in that, Before the step of inputting historical data into the frequency prediction model, the method further includes: Acquire training data, which includes the environmental conditions during air conditioner operation, future weather information, air conditioner operating conditions, and user settings. The neural network model is trained based on the training data to obtain a frequency prediction model.

10. The oil return control method for an air conditioner as described in claim 1, characterized in that, The method further includes: Obtain the operating time of the air conditioner; When the air conditioner runs for longer than a preset time threshold, the indoor fan of the air conditioner will stop running and the operating mode will be switched to the oil return control mode. The operating time between the time corresponding to the first operation at a frequency exceeding the preset frequency threshold and the current time is determined based on the oil return control mode, as well as the maximum non-oil return time corresponding to the current time. Oil return control is performed based on the runtime and the maximum non-oil return time.

11. An oil return control device for an air conditioner, characterized in that, The air conditioner oil return control device includes a memory, a processor, and an air conditioner oil return control program stored in the memory and executable on the processor. When the air conditioner oil return control program is executed by the processor, it implements the various steps of the air conditioner oil return control method as described in any one of claims 1-10.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an oil return control program for an air conditioner, which, when executed by a processor, implements the various steps of the oil return control method for an air conditioner as described in any one of claims 1-10.

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