Oil return control method and device, air conditioning unit and storage medium
By predicting the oil return and usage periods of the air conditioning unit, postponing the oil return task and adjusting the operating parameters, the noise and temperature fluctuation problems caused by the traditional oil return control method are solved, thus improving the user experience.
Patent Information
- Application Number
- CN202511176841.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-21
- Publication Date
- 2025-11-28
AI Technical Summary
Traditional air conditioning units with oil return control methods result in poor user experience, noise interference, and indoor temperature fluctuations, affecting the user experience.
By acquiring historical operating data of the air conditioning unit, the oil return period and the usual usage period in the future are predicted. The start time and duration of the oil return task are postponed to avoid the user's usage period. The oil return is carried out by reducing the unit's operating frequency and the number of steps of the electronic expansion valve.
This effectively avoids noise interference and indoor temperature fluctuations caused by the oil return process, thus improving the user experience.
Smart Images
Figure CN121025599A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of air conditioners, and in particular to an oil return control method and device, an air conditioning unit, and a storage medium. BACKGROUND
[0002] During operation of an air conditioning unit, in order to ensure reliability of the air conditioning unit, lubricating oil dispersed in system pipelines needs to be regularly pumped back to an outdoor unit. A conventional oil return control method usually triggers the air conditioning unit to start performing an oil return task at a fixed time interval. The oil return task includes adjusting the air conditioning unit to a cooling mode, adjusting a compressor to a relatively large operating frequency, and adjusting an indoor unit electronic expansion valve to a relatively large opening degree, so that high-speed flowing refrigerant can flush lubricating oil in the pipeline and carry the lubricating oil back to the outdoor unit.
[0003] However, the conventional oil return control method brings poor external feelings to users. This is because: after the compressor is adjusted to the relatively large operating frequency, the high-speed flowing refrigerant will generate relatively large flow noise in the indoor unit pipeline, and the noise interference will be brought to users as long as the high-speed refrigerant flows through the indoor unit participating in the oil return; and no matter whether the air conditioning unit is adjusted from a heating mode to the cooling mode or maintained in the cooling mode, since the compressor needs to be adjusted to the relatively large operating frequency and the indoor unit electronic expansion valve needs to be adjusted to the relatively large opening degree during the oil return, the throttling effect of the indoor electronic expansion valve will be poor, the indoor heat exchange effect will be poor, and ultimately the conventional oil return control method will cause relatively large indoor temperature fluctuations. SUMMARY
[0004] The present application provides an oil return control method and device, an air conditioning unit, and a storage medium to solve the problem of poor external feelings brought to users by the conventional oil return control method.
[0005] To solve the above technical problems, the technical solution of the present application is implemented as follows:
[0006] The present application provides an oil return control method, which includes: obtaining historical operation data of a preset air conditioning unit; determining a predicted oil return time period and a habit using time period of the air conditioning unit in a future time period according to the historical operation data of the air conditioning unit; determining an oil return delay start time and an oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return time period and the habit using time period; and starting the oil return delay start time and delaying the oil return delay time length to perform an oil return task.
[0007] The obtaining of the historical operation data of the preset air conditioning unit comprises: obtaining the historical operation data of the air conditioning unit in a historical time period every preset acquisition time period; or, after receiving a preset oil return control instruction, obtaining the historical operation data of the air conditioning unit on the previous day.
[0008] The determining of the predicted oil return time period and the habit using time period of the air conditioning unit in the future time period according to the historical operation data of the air conditioning unit comprises: after obtaining the historical operation data of the air conditioning unit in the historical time period, obtaining the historical oil return time period of the air conditioning unit on the previous day in the historical operation data in the historical time period, and determining the time period corresponding to the historical oil return time period in the future time period as the predicted oil return time period; and using a pre-trained user habit analysis model to determine the habit using time period of the air conditioning unit in the future time period according to the historical operation data in the historical time period; or, after obtaining the historical operation data of the air conditioning unit on the previous day, obtaining the historical oil return time period and the historical using time period of the air conditioning unit on the previous day from the historical operation data of the previous day; determining the time period corresponding to the historical oil return time period in the future time period as the predicted oil return time period, and determining the time period corresponding to the historical using time period in the future time period as the habit using time period.
[0009] The determining of the oil return delay start time and the oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return time period and the habit using time period comprises: in the case that the predicted oil return time period and the habit using time period have no intersection, determining the start time of the predicted oil return time period as the oil return delay time; and determining the oil return delay time length as zero; in the case that the predicted oil return time period and the habit using time period have an intersection, determining the start time of the predicted oil return time period as the oil return delay time; and determining the oil return delay time length according to the time difference between the start time of the predicted oil return time period and the end time of the habit using time period.
[0010] The determining of the oil return delay time length according to the time difference between the start time of the predicted oil return time period and the end time of the habit using time period comprises: rounding up the time difference to obtain a rounding time length; in the case that the rounding time length is less than a pre-set delay time length threshold, determining the rounding time length as the oil return delay time length; in the case that the rounding time length is greater than or equal to the delay time length threshold, determining the delay time length threshold as the oil return delay time length.
[0011] The oil return task is executed by delaying the oil return delay time length from the oil return delay start time point, including: starting from the oil return delay start time point, adjusting the frequency gradient according to a preset frequency, reducing the air conditioning unit operating frequency once every preset adjustment time period until the oil return delay time length is reached, and executing the oil return task.
[0012] The oil return task is executed by delaying the oil return delay time length from the oil return delay start time point, including: starting from the oil return delay start time point, adjusting the frequency gradient according to a preset frequency, reducing the air conditioning unit operating frequency once every preset adjustment time period until the oil return delay time length is reached, and executing the oil return task.
[0013] The oil return control device is further provided by the embodiment of the present application, including: a data acquisition module configured to acquire historical operation data of a preset air conditioning unit; a first determination module configured to determine a predicted oil return time period and a habit using time period corresponding to the air conditioning unit in a future time period according to the historical operation data of the air conditioning unit; a second determination module configured to determine an oil return delay start time point and an oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return time period and the habit using time period; and an oil return execution module configured to execute an oil return task by delaying the oil return delay time length from the oil return delay start time point.
[0014] The air conditioning unit is further provided by the embodiment of the present application, including: at least one communication interface; at least one bus connected with the at least one communication interface; at least one processor connected with the at least one bus; and at least one memory connected with the at least one bus, wherein the processor is configured to execute an oil return control program stored in the memory to implement the oil return control method of any one of the above.
[0015] The computer readable storage medium is further provided by the embodiment of the present application, and the computer readable storage medium stores computer executable instructions, and the computer executable instructions are executed to implement the oil return control method of any one of the above.
[0016] Compared with the prior art, the above technical solution provided by the embodiments of the present application has the following advantages: the method provided by the embodiments of the present application can obtain historical operation data of a preset air conditioning unit; according to the historical operation data of the air conditioning unit, a predicted oil return period and a habitual use period corresponding to the air conditioning unit in a future time period are determined; according to the predicted oil return period and the habitual use period, an oil return delay start time and an oil return delay time length of the air conditioning unit in the future time period are determined; and an oil return task is performed from the oil return delay start time and delayed for the oil return delay time length. The embodiments of the present application can predict a predicted oil return period of an air conditioning unit in a future time period and predict a habitual use period of the air conditioning unit by a user, delay an oil return task according to the predicted oil return period and the habitual use period, and make a real execution time of the oil return task avoid the habitual use period of the air conditioning unit by the user to the greatest extent, thereby avoiding an unsatisfactory external feeling of the user caused by oil return to the greatest extent. BRIEF DESCRIPTION OF DRAWINGS
[0017] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or the prior art description will be briefly introduced here. Obviously, for those skilled in the art, other drawings can also be obtained based on these drawings without any creative effort.
[0019] One or more embodiments are illustrated by way of example in the drawings that are for illustrative purposes only, and are not construed to limit the embodiments, and elements having the same reference numerals in the drawings represent similar elements, unless otherwise specified, and the drawings do not constitute a proportional limitation.
[0020] Figure 1 A flowchart of an oil return control method according to an embodiment of the present application;
[0021] Figure 2 A step flowchart of oil return control according to an embodiment of the present application;
[0022] Figure 3 A structural diagram of an oil return control device according to an embodiment of the present application;
[0023] Figure 4 A structural diagram of an oil return control device according to an embodiment of the present application; DETAILED DESCRIPTION
[0024] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work shall fall into the scope of protection of the present application.
[0025] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described in the following. Of course, they are only examples and the purpose is not to limit the present application. In addition, reference numerals and / or letters can be repeated in different examples in the present application. Such repetition is for the purpose of simplification and clarity, and it does not indicate the relationship between the various embodiments and / or settings discussed.
[0026] The embodiments of the present application provide an oil return control method. The execution subject of the present application is an air conditioning unit. The types of air conditioning units include but are not limited to: a multi-split air conditioner. As shown in Figure 1 The flow chart of the oil return control method according to an embodiment of the present application is shown.
[0027] In step S110, the historical operation data of a preset air conditioning unit is obtained.
[0028] The preset air conditioning unit refers to the air conditioning unit to be executed for oil return control.
[0029] The historical operation data refers to the operation data of the air conditioning unit before the data acquisition time.
[0030] The historical operation data includes but is not limited to: the start time and end time of each execution of the oil return task of the air conditioning unit, and the start time and end time of the operation of the air conditioning unit in the selected mode. The selected mode refers to the working mode selected by the user. The selected mode includes but is not limited to: the cooling mode, the heating mode, the dehumidification mode and the air supply mode.
[0031] In step S120, according to the historical operation data of the air conditioning unit, the predicted oil return period and the habit using period corresponding to the future time period of the air conditioning unit are determined.
[0032] The future time period refers to the time period to be executed for oil return control operation. The start time of the future time period is the current time.
[0033] The predicted oil return period refers to a predicted period in which the air conditioning unit performs an oil return task in a future period. Further, since the oil return task is performed every certain period in a day, the period in which the oil return task is performed in the future period is similar to the period in which the oil return task is performed in the last day, and thus the historical oil return period of the air conditioning unit in the previous day can be determined as the predicted oil return period of the air conditioning unit in the future period. The historical oil return period refers to a period between a start time and an end time in which the air conditioning unit performs an oil return task in the previous day.
[0034] The habitual use period refers to a period in which the user usually uses the air conditioning unit. For example, if the user usually uses the air conditioning unit in two periods, i.e., from 9:00 to 12:00 in the morning and from 14:00 to 18:00 in the afternoon, the first habitual use period is determined as from 9:00 to 12:00, and the second habitual use period is determined as from 14:00 to 18:00.
[0035] In step S130, the oil return delayed start time and the oil return delayed time length of the air conditioning unit in the future period are determined according to the predicted oil return period and the habitual use period.
[0036] The oil return delayed start time refers to a start time at which the oil return task is delayed.
[0037] The oil return delayed time length refers to a time length during which the oil return task is delayed from the oil return delayed start time.
[0038] In step S140, the oil return task is performed after being delayed for the oil return delayed time length from the oil return delayed start time.
[0039] For example, if the user usually uses the air conditioning unit from 9:00 to 12:00 in the morning, and the historical oil return period is from 11:00 to 12:00 in the morning of the previous day, the oil return delayed start time is 11:00 in the morning of the current day, and the oil return delayed time length is 1 hour, i.e., the oil return task is performed from 12:00 in the morning of the current day after being delayed for 1 hour from 11:00 in the morning of the current day, so as to avoid the start of the oil return task during the period in which the user uses the air conditioning unit from 9:00 to 12:00 in the morning, and to avoid the noise and the large fluctuation of the indoor temperature caused by the start of the oil return task during the period in which the user uses the air conditioning unit.
[0040] In the embodiment of the present application, historical operation data of a preset air conditioning unit can be acquired; according to the historical operation data of the air conditioning unit, a predicted oil return period and a habitual use period of the air conditioning unit corresponding to a future time period can be determined; according to the predicted oil return period and the habitual use period, an oil return delay start time and an oil return delay time length of the air conditioning unit in the future time period can be determined; and an oil return task can be executed from the oil return delay start time and delayed for the oil return delay time length. The embodiment of the present application can predict a predicted oil return period of an air conditioning unit in a future time period and predict a habitual use period of the air conditioning unit by a user, delay an oil return task according to the predicted oil return period and the habitual use period, and make a real execution time of the oil return task avoid the habitual use period of the air conditioning unit by the user to the greatest extent, thereby avoiding an unsatisfactory external feeling of the user caused by oil return to the greatest extent.
[0041] In order to make the embodiment of the present application easier to understand, the oil return control method of the embodiment of the present application will be further described below.
[0042] The oil return control method of the embodiment of the present application is an oil return control operation that can be executed once or an oil return control operation that can be executed cyclically.
[0043] In the embodiment of the present application, in order to analyze a delay time point of an oil return task, historical operation data of a preset air conditioning unit can be acquired, and the historical operation data is analyzed as a data basis.
[0044] Two ways of acquiring historical operation data are provided below. Of course, it should be understood by those skilled in the art that the way of acquiring historical operation data is not limited to the following two ways.
[0045] In the first way, the historical operation data of the air conditioning unit in a historical time period can be acquired every preset acquisition time period.
[0046] The acquisition time period can be determined according to requirements. For example, the acquisition time period is one day.
[0047] The historical time period can include at least one historical period. The historical operation data in the historical time period can include historical operation data of the previous day at the current time.
[0048] Further, the acquisition time period can be 24 hours, the historical time period can be 24 hours of the previous day, and the time period for which the oil return control operation is to be executed can be the current 24 hours. In this way, the historical operation data in the previous 24 hours can be acquired every 24 hours as a data basis for executing the oil return control operation in the current 24 hours. For example, in order to execute the oil return control operation today, the historical operation data of the previous day can be acquired at zero o'clock today.
[0049] The historical operation data in the historical time period can further include historical operation data of a historical time period that has the same attribute as the time period in which the oil return control operation is to be performed.
[0050] The same attribute includes, but is not limited to, both being a whole day, both being a day, and both being a same season.
[0051] The length of the time period in which the oil return control operation is to be performed is less than or equal to the length of the historical time period that has the same attribute. That is, the length of the time period in which the oil return control operation is to be performed can be one day, and the length of the historical time period that has the same attribute can be greater than or equal to one day.
[0052] For example, when summer comes, in order to perform the oil return control operation every day in this summer, the historical operation data in the historical time period can be obtained every day, and the historical operation data obtained each time includes historical operation data of the air conditioning unit in the summer of last year and historical operation data of the air conditioning unit in the day before yesterday.
[0053] In a second mode, after receiving the preset oil return control instruction, the historical operation data of the air conditioning unit in the day before yesterday is obtained.
[0054] The oil return control instruction is used to instruct to perform the oil return control operation. Further, the oil return control instruction can be received from a control terminal corresponding to the air conditioning unit. The control terminal includes, but is not limited to, a mobile terminal, a smart remote controller, and a control panel of the air conditioning unit.
[0055] The demand time period of the user for the air conditioning unit on adjacent days is relatively close. In the case that the user temporarily needs to perform the oil return control operation on the air conditioning unit, in order to reduce the amount of calculation and shorten the response time of the oil return control operation, the historical operation data of the day before yesterday can be obtained, so that the oil return control operation can be quickly performed today.
[0056] For example, the user thinks that the noise of the oil return process yesterday is large, and hopes that the noise does not interfere today. At this time, the user can click a pre-set oil return control button in an air conditioning unit APP of a mobile terminal, and then send an oil return control instruction to the air conditioning unit through the mobile terminal, so that the air conditioning unit performs the oil return control operation.
[0057] In the embodiments of the present application, after the historical operation data of the air conditioning unit is obtained, the historical operation data of the air conditioning unit can be used to determine a predicted oil return time period and a habitual use time period corresponding to the air conditioning unit.
[0058] If the oil return task is not delayed in the future time period, the historical oil return time period of the air conditioning unit in the previous day is directly determined as the predicted oil return time period in the future time period. Moreover, the time period in which the air conditioning unit is used by the user in the previous day is similar to the time period in which the air conditioning unit is used by the user in the current day, and the user has similar habits of using the air conditioning unit in the two time periods with similar attributes, so the historical operation data is used to analyze the habits of the user to use the air conditioning unit, and the accuracy is higher.
[0059] To match the two methods of obtaining the historical operation data, two methods of determining the predicted oil return time period and the habit using time period are provided below. Of course, those skilled in the art should know that the methods of determining the historical oil return time period and the habit using time period are not limited to the two methods below.
[0060] In the first method, after the historical operation data of the air conditioning unit in the historical time period is obtained, the historical oil return time period of the air conditioning unit in the previous day is obtained from the historical operation data in the historical time period, and a time period corresponding to the historical oil return time period in the future time period is determined as the predicted oil return time period. Moreover, a habit analysis model of the user is used to determine the habit using time period of the air conditioning unit in the future time period according to the historical operation data in the historical time period.
[0061] The habit analysis model of the user is used to determine the habit using time period of the air conditioning unit in the future time period according to the historical operation data.
[0062] That is, the oil return time period of the previous day is directly determined as the predicted oil return time period of the current day, and the habit analysis model of the user is used to predict the habit using time period of the current day.
[0063] In the second method, after the historical operation data of the air conditioning unit in the previous day is obtained, the historical oil return time period and the historical using time period of the air conditioning unit in the previous day are obtained from the historical operation data in the previous day. A time period corresponding to the historical oil return time period in the future time period is determined as the predicted oil return time period, and a time period corresponding to the historical using time period in the future time period is determined as the habit using time period.
[0064] The historical oil return time period refers to a time period in which the air conditioning unit performs an oil return task in a historical time period.
[0065] The historical using time period refers to a time period in which the air conditioning unit is used by the user in a historical time period.
[0066] That is to say, directly determine the oil return period of yesterday as the predicted oil return period of today, and directly determine the air conditioning unit usage period of yesterday as the habit usage period of today.
[0067] For example, Table 1 is the historical oil return period and the historical usage period obtained from the historical running data of the previous day.
[0068]
[0069] Table 1
[0070] In the embodiment of the present application, after determining the predicted oil return period and the habit usage period of the air conditioning unit corresponding to the future time period, the oil return delay start time and the oil return delay time length of the air conditioning unit in the future time period can be determined according to the predicted oil return period and the habit usage period.
[0071] Specifically, the priority of the oil return task is higher than that of the work task. The work task refers to running the air conditioning unit in the selected mode.
[0072] In one case, the air conditioning unit is not running in the selected mode before starting to execute the oil return task. In this way, after starting to execute the oil return task, the air conditioning unit can only run in the fixed mode (generally the refrigeration mode) before the execution of the oil return task is completed, the user cannot change the running mode of the air conditioning unit, and the user can control the air conditioning unit to run in the selected mode after the execution of the oil return task is completed. In this case, the oil return period can be before or after the usage period of the air conditioning unit, that is to say, there is no intersection between the oil return period and the habit usage period.
[0073] In the case where the predicted oil return period and the habit usage period have no intersection, the start time of the predicted oil return period is determined as the oil return delay start time, and the oil return delay time length is determined as zero. That is to say, in the case where the predicted oil return period and the habit usage period have no intersection, the historical oil return period and the historical usage period shown in Table 1 do not need to delay the execution of the oil return task, and the oil return task can be directly executed at the start time of the predicted oil return time.
[0074] In another case, the air conditioning unit can insert the oil return task in the process of running in the selected mode, and continue to run in the selected mode after the execution of the oil return task is completed. In this case, the start time of the oil return period can be within the usage period of the air conditioning unit, that is to say, there is an intersection between the oil return period and the habit usage period.
[0075] In a case where the predicted oil return period and the habit using period intersect, a start time of the predicted oil return period is determined as the oil return delay start time; and a time difference between the start time of the predicted oil return period and an end time of the habit using period is determined as the oil return delay time length.
[0076] Further, in a case where the time difference is less than a preset delay time threshold, the time difference is determined as the oil return delay time length; and in a case where the time difference is greater than or equal to the delay time threshold, the delay time threshold is determined as the oil return delay time length.
[0077] Further, the time difference can be rounded up to obtain an integer time length; in a case where the integer time length is less than a preset delay time threshold, the integer time length is determined as the oil return delay time length; and in a case where the integer time length is greater than or equal to the delay time threshold, the delay time threshold is determined as the oil return delay time length.
[0078] The delay time threshold refers to a maximum delay time. When the delay time of the air conditioning unit for delaying oil return exceeds the delay time threshold, there is a risk of compressor damage.
[0079] For example, in a case where the delay time threshold is 3 hours and the time difference is 1.5 hours, 2 hours can be determined as the oil return delay time length, or 1.5 hours can be directly determined as the oil return delay time length. In this way, when the start time of the predicted oil return period arrives, the oil return task can be temporarily not performed, and the oil return task is performed after the oil return delay time length, so that the oil return demand time of the air conditioning unit is prolonged, the oil return is avoided to occur in the time period in which the user uses the air conditioning, and it is ensured that the user is not affected by the indoor temperature fluctuation and noise during the use of the air conditioning.
[0080] In the embodiment of the present application, the oil return task is performed after the oil return delay start time and for the oil return delay time length.
[0081] For example, as shown in Table 2, the oil return start time after the oil return control operation is performed, that is, the time at which the oil return task is started, is delayed to after 17:30, so that the time period in which the user uses the air conditioning unit is avoided, and the temperature fluctuation and noise interference during the oil return are avoided to the user.
[0082]
[0083] Table 2
[0084] In the embodiment of the present application, although the delay duration threshold is set, if the air conditioning unit continuously delays the oil return task for multiple times and the delay duration of each time is the delay duration threshold, there is still a risk of damaging the compressor. Therefore, in order to delay the oil return demand time of the air conditioning unit and reduce the damage risk of the delayed oil return task to the compressor, the air conditioning unit can be operated in a reduced load mode during the delay period.
[0085] Specifically, starting from the oil return delay start time, the unit operating frequency of the air conditioning unit is reduced by a preset frequency adjustment gradient every preset adjustment time period until the oil return delay time length is reached, and the oil return task is performed.
[0086] The frequency adjustment gradient refers to the degree of reduction of the unit operating frequency each time. The frequency adjustment gradient can be a frequency value or a percentage. For example, the unit operating frequency is reduced by 20% each time.
[0087] The adjustment time period can be an empirical value or a value obtained through experiments. For example, the adjustment time period is 1 hour.
[0088] For example, starting from the oil return delay start time T1, the unit operating frequency is adjusted every adjustment time period (1 hour) using the frequency adjustment mode shown in Table 3; wherein at time T1, the unit operating frequency of the air conditioning unit is X. Of course, it should be understood by those skilled in the art that Table 3 is only used to illustrate the embodiment of the present application, and is not used to limit the embodiment of the present application.
[0089]
[0090] Table 3
[0091] In the embodiment of the present application, when the oil return task is performed, the air conditioning unit is switched to the refrigeration mode. If the air conditioning unit is already operating in the refrigeration mode, it can be maintained in the refrigeration mode. When the oil return task is performed, in addition to adjusting the air conditioning unit to the refrigeration mode, the unit operating parameters of the air conditioning unit also need to be adjusted. Among them, the parameter types in the unit operating parameters include but are not limited to: unit operating frequency and indoor electronic expansion valve step number.
[0092] Starting from the oil return delay start time, after the end of the oil return delay time length, if the air conditioning unit has stopped performing the work task, the oil return task is started; if the air conditioning unit has not stopped performing the work task, the oil return task is performed in a reduced output mode, so as to ensure the operation reliability of the air conditioning unit and reduce the adverse external feeling brought to the user during the oil return period. The work task refers to operating the air conditioning unit in the selected mode.
[0093] The air conditioning unit can be determined whether to have stopped performing a work task after the end of the oil return delay time length according to the habit use period, or the air conditioning unit can be determined whether to have stopped performing a work task in real time after the end of the oil return delay time length.
[0094] Specifically, the oil return delay end time is determined according to the oil return delay start time and the oil return delay time length; in the case that the oil return delay start time is less than or equal to the end time of the habit use period, the oil return task is performed according to the preset first unit operation parameter; in the case that the oil return delay start time is greater than the end time of the habit use period, the oil return task is performed according to the preset second unit operation parameter; wherein the parameter value of each parameter type in the second unit operation parameter is less than the parameter value of the corresponding parameter type in the first unit operation parameter.
[0095] The first unit operation parameter is a unit operation parameter adopted when the oil return task is normally performed.
[0096] The second unit operation parameter is a unit operation parameter adopted when the output reduction oil return task is performed.
[0097] For example, the unit operation frequency in the first unit operation parameter is P, and the number of steps of the indoor electronic expansion valve is K; the unit operation frequency in the second unit operation parameter is 0.7P, and the number of steps of the indoor electronic expansion valve is 0.8K. Wherein, P and K are empirical values or values obtained through experiments, such as P is 100Hz and K is 200pls.
[0098] Compared with the air conditioning unit running with the first unit operation parameter, the air conditioning unit running with the second unit operation parameter has lower unit operation frequency, smaller number of steps of the indoor electronic expansion valve, better throttling effect of the electronic expansion valve, and lower refrigerant flow rate during the oil return period, so that the indoor temperature fluctuation and the noise generated during the oil return period are reduced, thereby reducing the adverse effects on the user's external perception such as body feeling and hearing caused by the oil return period.
[0099] Further, during normal oil return, the unit operating frequency is relatively large, the indoor unit electronic expansion valve step is also relatively large, and the flow rate of the refrigerant is relatively large, so that the lubricating oil can be conveniently and quickly flushed and brought back to the outdoor unit. Moreover, the oil return is performed in the refrigeration mode, if the user currently selects the refrigeration mode, then after entering the oil return mode, all indoor units will open the electronic expansion valve, the throttling effect of the indoor unit electronic expansion valve becomes poor, the indoor unit heat exchange effect becomes poor, and the indoor temperature will fluctuate; and the high-speed flowing refrigerant will generate noise in the refrigerant pipeline; if the user currently selects the heating mode, then after entering the oil return mode, the heating mode will be switched to the refrigeration mode, at this time the indoor unit fan will stop, the indoor temperature will fluctuate, and the high-speed flowing refrigerant will generate noise in the refrigerant pipeline. Based on this, during the use of the air conditioning unit by the user, the unit operating frequency and the indoor unit electronic expansion valve step can be reduced to reduce the indoor temperature fluctuation and noise during the oil return.
[0100] For example: in Table 4, although the oil return control operation is adopted to delay the execution time of the oil return task by the maximum delay time (3 hours), the execution time of the oil return task is still within the period of use of the air conditioning unit by the user, in this case, the air conditioning unit can be operated by using the second unit operating parameter to reduce the unit operating frequency and the indoor unit electronic expansion valve step, and to reduce the indoor temperature fluctuation and noise during the oil return.
[0101]
[0102] Table 4
[0103] Since the air conditioning unit will have temperature fluctuation and noise problems during the oil return, the oil return control method provided by the embodiments of the present application can improve the comfort of the user by peak-shifting oil return, the oil return occurrence time period and the unit operating parameter during the oil return are defined according to the user usage habit and the prediction method of the unit oil return time, the peak-shifting oil return is realized, the oil return is avoided to occur during the use of the air conditioning unit by the user as much as possible, the temperature fluctuation and noise problems in the indoor space during the oil return are reduced, and the impact on the external feeling of the user is reduced.
[0104] A more specific example is given below to illustrate the oil return control method of the embodiments of the present application. As shown in FIG. 1, it is a step flow chart of the oil return control according to an embodiment of the present application. Figure 2
[0105] In step S210, the usage time period and the oil return time period of the air conditioning unit on the previous day are obtained, the usage time period is determined as the habit usage time period, and the oil return time period is determined as the predicted oil return time period.
[0106] Step S220, determining whether the start time of the predicted oil return period is in the habitual use period; if yes, executing step S230; if no, executing step S.
[0107] Step S230, determining the oil return delay start time and the oil return delay time length according to the difference between the start time of the predicted oil return period and the end time of the habitual use period.
[0108] Step S240, determining whether the air conditioning unit has ended running in the working mode from the oil return delay start time and for the oil return delay time length; if yes, executing step S250; if no, executing step S260.
[0109] Step S250, executing the oil return task according to the first unit running parameter.
[0110] Step S260, executing the oil return task according to the second unit running parameter.
[0111] Step S270, executing the oil return task according to the first unit running parameter when the start time of the predicted oil return period arrives.
[0112] The embodiment of the present application further provides an oil return control device. Figure 3 As shown in the figure, it is a structural diagram of the oil return control device according to an embodiment of the present application.
[0113] The oil return control device comprises:
[0114] The data acquisition module 310 is configured to acquire historical running data of a preset air conditioning unit.
[0115] The first determination module 320 is configured to determine a predicted oil return period and a habitual use period corresponding to a future time period of the air conditioning unit according to the historical running data of the air conditioning unit.
[0116] The second determination module 330 is configured to determine an oil return delay start time and an oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return period and the habitual use period.
[0117] The oil return execution module 340 is configured to execute an oil return task from the oil return delay start time and for the oil return delay time length.
[0118] The functions of the device described in the embodiment of the present application have been described in the above method embodiment, so the description of the present embodiment is not detailed, and the relevant description in the foregoing embodiments can be referred to, which is not repeated here.
[0119] The embodiment of the present application further provides an oil return control device, as shown in the figure. Figure 4Fig. 1 shows a structural diagram of an oil return control device according to an embodiment of the present application.
[0120] The oil return control device includes a processor 410, a communication interface 420, a memory 430, and a communication bus 440. The processor 410, the communication interface 420, and the memory 430 communicate with each other through the communication bus 440.
[0121] The memory 430 is configured to store a computer program.
[0122] In an embodiment of the present application, the processor 410 is configured to execute the program stored in the memory 430 to implement the oil return control method provided by any one of the preceding method embodiments, including: obtaining historical running data of a preset air conditioning unit; determining a predicted oil return time period and a habitual use time period of the air conditioning unit in a future time period according to the historical running data of the air conditioning unit; determining an oil return delay start time and an oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return time period and the habitual use time period; and executing an oil return task from the oil return delay start time and delaying the oil return delay time length.
[0123] The obtaining of the historical running data of the preset air conditioning unit includes: obtaining the historical running data of the air conditioning unit in a historical time period every preset obtaining time period; or obtaining historical running data of the air conditioning unit in a previous day after receiving a preset oil return control instruction.
[0124] The determination of the predicted oil return time period and the habitual use time period of the air conditioning unit in the future time period according to the historical running data of the air conditioning unit includes: obtaining a historical oil return time period of the air conditioning unit in a previous day from the historical running data of the air conditioning unit in the historical time period after obtaining the historical running data of the air conditioning unit in the historical time period, determining a time period corresponding to the historical oil return time period in the future time period as the predicted oil return time period; and determining a habitual use time period of the air conditioning unit in the future time period according to the historical running data in the historical time period by using a pre-trained user habit analysis model; or obtaining a historical oil return time period and a historical use time period of the air conditioning unit in the previous day from the historical running data of the air conditioning unit in the previous day after obtaining the historical running data of the air conditioning unit in the previous day, determining a time period corresponding to the historical oil return time period in the future time period as the predicted oil return time period, and determining a time period corresponding to the historical use time period in the future time period as the habitual use time period.
[0125] The determining the oil return delay start time and the oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return time period and the habit using time period comprises: in the case that the predicted oil return time period and the habit using time period have no intersection, determining the start time of the predicted oil return time period as the oil return delay time, and determining the oil return delay time length as zero; in the case that the predicted oil return time period and the habit using time period have intersection, determining the start time of the predicted oil return time period as the oil return delay time, and determining the oil return delay time length according to the time difference between the start time of the predicted oil return time period and the end time of the habit using time period.
[0126] The determining the oil return delay time length according to the time difference between the start time of the predicted oil return time period and the end time of the habit using time period comprises: rounding up the time difference to obtain an integral time length; in the case that the integral time length is less than a pre-set delay time length threshold, determining the integral time length as the oil return delay time length; in the case that the integral time length is greater than or equal to the delay time length threshold, determining the delay time length threshold as the oil return delay time length.
[0127] The delaying the oil return delay time length from the oil return delay start time to execute the oil return task comprises: starting from the oil return delay start time, adjusting the unit running frequency according to a pre-set frequency adjustment gradient, and reducing the unit running frequency of the air conditioning unit once every pre-set adjustment time period until the oil return delay time length is reached to execute the oil return task.
[0128] The executing the oil return task comprises: determining an oil return delay end time according to the oil return delay start time and the oil return delay time length; in the case that the oil return delay start time is less than or equal to the end time of the habit using time period, executing the oil return task according to a pre-set first unit running parameter; in the case that the oil return delay start time is greater than the end time of the habit using time period, executing the oil return task according to a pre-set second unit running parameter; wherein the parameter value of each parameter type in the second unit running parameter is less than the parameter value of the corresponding parameter type in the first unit running parameter.
[0129] The application further provides a computer readable storage medium, which stores a computer program, and the computer program is executed by a processor to implement the steps of the oil return control method provided by any one of the preceding method embodiments. Since the oil return control method has been described in detail above, the description of the present embodiment will not be elaborated here, and the related description in the preceding embodiments can be referred to.
[0130] The device embodiments described above are only illustrative, wherein the units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed to multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the embodiment.
[0131] From the above description of the embodiments, those skilled in the art can clearly understand that the embodiments can be implemented by means of software plus a general hardware platform, and of course can also be implemented by hardware. Based on such an understanding, the above technical solutions, essentially or in terms of related art, 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, or an optical disk, and includes a number of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in the various embodiments or some parts of the embodiments.
[0132] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has", "having" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically indicated as such. It is also to be understood that additional or alternative steps can be employed.
[0133] The above description is merely one specific implementation of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An oil return control method characterized by, The method comprises the following steps: obtaining historical operation data of a preset air conditioning unit; determining a predicted oil return time period and a habitual use time period of the air conditioning unit in a future time period according to the historical operation data of the air conditioning unit; determining an oil return delay start time and an oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return time period and the habitual use time period; delaying the oil return delay time length from the oil return delay start time to perform an oil return task.
2. The method of claim 1, wherein, The method of obtaining the historical operation data of the preset air conditioning unit comprises the following steps: obtaining the historical operation data of the air conditioning unit in a historical time period every preset acquisition time period; or after receiving a preset oil return control instruction, obtaining the historical operation data of the air conditioning unit on the previous day.
3. The method of claim 2, wherein, The method of determining the predicted oil return time period and the habitual use time period of the air conditioning unit in the future time period according to the historical operation data of the air conditioning unit comprises the following steps: after obtaining the historical operation data of the air conditioning unit in the historical time period, obtaining a historical oil return time period of the air conditioning unit on the previous day in the historical operation data in the historical time period, determining a time period corresponding to the historical oil return time period in the future time period as the predicted oil return time period; and determining a habitual use time period corresponding to the historical time period in the future time period according to the historical operation data in the historical time period by using a pre-trained user habit analysis model; or after obtaining the historical operation data of the air conditioning unit on the previous day, obtaining a historical oil return time period and a historical use time period of the air conditioning unit on the previous day from the historical operation data on the previous day; determining a time period corresponding to the historical oil return time period in the future time period as the predicted oil return time period, and determining a time period corresponding to the historical use time period in the future time period as the habitual use time period.
4. The method of claim 1, wherein, The method of determining the oil return delay start time and the oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return time period and the habitual use time period comprises the following steps: in the case that the predicted oil return time period and the habitual use time period have no intersection, determining the start time of the predicted oil return time period as the oil return delay time; and determining the oil return delay time length as zero; in the case that the predicted oil return time period and the habitual use time period have an intersection, determining the start time of the predicted oil return time period as the oil return delay time; and determining the oil return delay time length according to a time difference between the start time of the predicted oil return time period and the end time of the habitual use time period.
5. The method of claim 4, wherein, The method of determining the oil return delay time length according to the time difference between the start time of the predicted oil return time period and the end time of the habitual use time period comprises the following steps: rounding up the time difference to obtain an integer time length; in the case that the integer time length is less than a pre-set delay time threshold, determining the integer time length as the oil return delay time length; and in the case that the integer time length is greater than the pre-set delay time threshold, determining the pre-set delay time threshold as the oil return delay time length. In a case where the rounding length is greater than or equal to the delay length threshold, the delay length threshold is determined as the oil return delay time length.
6. The method of claim 1, wherein, The oil return task is performed by delaying the oil return delay time length from the oil return delay start time. The oil return task is performed by delaying the oil return delay time length from the oil return delay start time.
7. The method of claim 1, wherein, The oil return task is performed by delaying the oil return delay time length from the oil return delay start time. An oil return delay end time is determined according to the oil return delay start time and the oil return delay time length. In a case where the oil return delay start time is less than or equal to the end time of the habit use period, the oil return task is performed according to a preset first unit operation parameter. In a case where the oil return delay start time is greater than the end time of the habit use period, the oil return task is performed according to a preset second unit operation parameter. Each parameter value of each parameter type in the second unit operation parameter is less than a corresponding parameter value of a corresponding parameter type in the first unit operation parameter.
8. An oil return control device characterized by comprising: The method comprises: A data acquisition module is configured to acquire historical operation data of a preset air conditioning unit. A first determination module is configured to determine a predicted oil return period and a habit use period corresponding to a future time period of the air conditioning unit according to the historical operation data of the air conditioning unit. A second determination module is configured to determine an oil return delay start time and an oil return delay time length of the air conditioning unit in the future time period according to the predicted oil return period and the habit use period. An oil return execution module is configured to perform an oil return task by delaying the oil return delay time length from the oil return delay start time.
9. An air conditioning unit characterized by, The method comprises: At least one communication interface; At least one bus connected to the at least one communication interface; and at least one processor connected to the at least one bus. At least one memory connected to the at least one bus, wherein the processor is configured to execute an oil return control program stored in the memory to implement the oil return control method of any one of claims 1-7.
10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer executable instructions, and the computer executable instructions are executed to implement the oil return control method of any one of claims 1-7. The computer readable storage medium stores computer executable instructions, and the computer executable instructions are executed to implement the oil return control method of any one of claims 1-7.