Control method and device of air conditioning unit, electronic equipment and storage medium

Abstract

The application relates to the air conditioning technical field, in particular to a control method and device of an air conditioning unit, electronic equipment and a storage medium, wherein the method comprises the following steps: detecting whether the air conditioning unit meets an oil return condition; if the air conditioning unit meets the oil return condition, obtaining a target rotating speed of a current oil return period, adjusting an actual rotating speed of an inner fan in the air conditioning unit to the target rotating speed, and detecting an actual pressure value of the air conditioning unit after a preset running duration; if the actual pressure value is less than or equal to an oil return threshold value of the air conditioning unit, controlling the air conditioning unit to enter an oil return mode, otherwise, reducing the actual rotating speed of the inner fan according to a preset gradient until the actual pressure value is less than or equal to the oil return threshold value. Therefore, the problems that the air conditioning unit is prone to high-pressure frequency limitation and cannot return oil under the condition that the outdoor temperature is high, and the problems that long-time low-frequency operation causes the air conditioning compressor to lack oil and the air conditioning unit has poor reliability are solved.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a control method, device, electronic equipment and storage medium for an air conditioning unit. Background Technology

[0002] With the development of modern society, air conditioning units are increasingly widely used in people's lives. Air conditioning units generally include components such as fans, heaters, coolers, and filters. The working process is to filter out harmful substances such as dust, smoke, black smoke, and organic particles from the air through the filter, and then send the filtered air to the cooler or heater through the fan to cool or heat it to reach the set temperature before sending it into the room.

[0003] In related technologies, outdoor units, being placed outdoors, are easily exposed to direct sunlight, resulting in higher temperatures. This can cause high-voltage frequency limiting in inverter units, preventing them from entering the oil return mode. Furthermore, prolonged low-frequency operation can lead to oil shortage in the compressor, causing wear and tear and affecting the unit's operational reliability. Summary of the Invention

[0004] This application provides a control method, device, electronic equipment, and storage medium for an air conditioning unit to solve the problems in the related art, such as the problem that air conditioning units are prone to high-pressure frequency limiting and inability to return oil when the outdoor temperature is high, and the problem that long-term low-frequency operation leads to oil shortage in the unit compressor, resulting in compressor wear and poor unit reliability.

[0005] The first aspect of this application provides a control method for an air conditioning unit, comprising the following steps: detecting whether the air conditioning unit meets the oil return condition; if the air conditioning unit meets the oil return condition, obtaining the target speed of the current oil return cycle, adjusting the actual speed of the indoor fan in the air conditioning unit to the target speed, and detecting the actual pressure value of the air conditioning unit after a preset running time; if the actual pressure value is less than or equal to the oil return threshold of the air conditioning unit, controlling the air conditioning unit to enter the oil return mode, otherwise reducing the actual speed of the indoor fan according to a preset gradient until the actual pressure value is less than or equal to the oil return threshold.

[0006] Optionally, obtaining the target speed of the current oil return cycle includes: obtaining the actual fresh air ratio and the actual inner wall temperature of the air conditioning unit; determining a correction coefficient based on the actual fresh air ratio; and calculating the target speed based on the ratio of the preset inner wall temperature to the actual inner wall temperature, the correction coefficient, and the actual speed of the inner fan.

[0007] Optionally, the actual fresh air ratio is inversely proportional to the correction coefficient.

[0008] Optionally, obtaining the target speed of the current oil return cycle includes: detecting the actual running time of the air conditioning unit; if the actual running time is greater than a first preset time, obtaining the actual speed of the fan within multiple historical oil return cycles when the actual pressure value is less than or equal to the oil return threshold, and determining the target speed based on the average speed of the multiple historical oil return cycles.

[0009] Optionally, before detecting the actual pressure value of the air conditioning unit after a preset operating cycle, the method further includes: obtaining the actual temperature of the environment where the outdoor unit of the air conditioning unit is located; if the actual temperature is less than a first preset temperature, then the oil return threshold is a first threshold; if the actual temperature is greater than the first preset temperature, then the oil return threshold is a second threshold, wherein the first threshold is greater than the second threshold.

[0010] Optionally, detecting whether the air conditioning unit meets the oil return condition includes: obtaining the low-frequency operating time of the air conditioning unit; if the low-frequency operating time is greater than a second preset time, then the air conditioning unit is determined to meet the oil return condition; otherwise, the air conditioning unit is determined not to meet the oil return condition.

[0011] Optionally, before detecting whether the air conditioning unit meets the oil return conditions, the method further includes: obtaining the actual temperature of the environment where the outdoor unit of the air conditioning unit is located; if the actual temperature is greater than the second preset temperature, it is determined that the air conditioning unit is in a high-temperature operating condition, and the air conditioning unit is detected as meeting the oil return conditions.

[0012] A second aspect of this application provides a control device for an air conditioning unit, comprising: a detection module for detecting whether the air conditioning unit meets the oil return condition; a first processing module for, if the air conditioning unit meets the oil return condition, obtaining the target speed of the current oil return cycle, adjusting the actual speed of the indoor fan in the air conditioning unit to the target speed, and detecting the actual pressure value of the air conditioning unit after a preset running time; and a second processing module for, if the actual pressure value is less than or equal to the oil return threshold of the air conditioning unit, controlling the air conditioning unit to enter the oil return mode, otherwise reducing the actual speed of the indoor fan according to a preset gradient until the actual pressure value is less than or equal to the oil return threshold.

[0013] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the control method for an air conditioning unit as described in the above embodiments.

[0014] A fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the control method for an air conditioning unit as described in the above embodiments.

[0015] Therefore, this application has at least the following beneficial effects:

[0016] In this embodiment of the application, when the air conditioner is cooling under high-temperature conditions, the speed of the indoor fan can be adjusted first according to the fresh air ratio and the temperature of the inner panel, which effectively reduces the operating pressure of the unit. Then, based on the pressure and calculation of previous cycle data, the preset value of the indoor fan speed is determined, and the unit speed is further adjusted to improve the accuracy and timeliness of the processing, reduce the impact of oil return on the actual use of customers, improve user comfort, and meet the requirements of the air conditioning unit to enter the oil return under high-temperature conditions, thereby improving the reliability of unit operation.

[0017] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a flowchart of a control method for an air conditioning unit according to an embodiment of this application;

[0020] Figure 2 This is an example diagram of a control device for an air conditioning unit according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of an electronic device according to an embodiment of this application. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0023] The following description, with reference to the accompanying drawings, outlines a control method, apparatus, electronic device, and storage medium for an air conditioning unit according to embodiments of this application. Addressing the issues mentioned in the background art, such as outdoor units being exposed to direct sunlight and thus experiencing higher temperatures, leading to high-voltage frequency limiting and inability to enter oil return mode for inverter units, and prolonged low-frequency operation causing compressor oil shortage and wear, thus affecting unit reliability, this application provides a control method for an air conditioning unit. This method detects whether the air conditioning unit meets the oil return conditions, calculates the target speed for the current cycle, adjusts the indoor fan speed to the target speed, and detects the actual pressure value of the air conditioning unit after a certain operating time. If the actual pressure value is less than or equal to the oil return threshold, the air conditioning unit is controlled to enter the oil return mode; otherwise, the indoor fan speed is reduced until the actual pressure value is less than the oil return threshold. This effectively reduces the unit's operating pressure, minimizes the impact of oil return on actual user experience, improves user comfort, and allows for oil return under high-temperature conditions, thus improving unit operational reliability. This solves the problems of high-pressure frequency limiting and inability to return oil when the outdoor temperature is high, as well as the problems of compressor wear and poor unit reliability caused by long-term low-frequency operation.

[0024] Specifically, Figure 1 This is a flowchart illustrating a control method for an air conditioning unit provided in an embodiment of this application.

[0025] like Figure 1 As shown, the control method for this air conditioning unit includes the following steps:

[0026] In step S101, it is detected whether the air conditioning unit meets the oil return conditions.

[0027] Among them, oil return refers to the process where some of the lubricating oil from the compressor of the air conditioning unit is discharged from the compressor along with the refrigerant gas and enters the system condenser, piping, and evaporator. This discharged lubricating oil can be smoothly carried back to the compressor.

[0028] It is understood that the embodiments of this application detect whether the air conditioning unit meets the oil return conditions so that it can enter the pre-processing stage if the conditions are met.

[0029] In this embodiment of the application, before detecting whether the air conditioning unit meets the oil return condition, the method further includes: obtaining the actual temperature of the environment where the outdoor unit of the air conditioning unit is located; if the actual temperature is greater than the second preset temperature, it is determined that the air conditioning unit is in a high-temperature operating condition, and the air conditioning unit is detected as meeting the oil return condition.

[0030] The second preset temperature can be set by the user or according to the actual situation of the air conditioning unit; no specific limitation is made here.

[0031] It is understood that the embodiments of this application obtain the actual temperature of the environment where the outdoor unit of the air conditioning unit is located. If the actual temperature is greater than the set temperature, it is determined that the air conditioning unit is in a high-temperature operating condition, and the air conditioning unit is checked to see if it meets the oil return conditions, so as to make subsequent adjustments according to the actual situation of the air conditioning unit and improve the reliability of the unit operation.

[0032] In this embodiment of the application, detecting whether the air conditioning unit meets the oil return condition includes: obtaining the low-frequency operating time of the air conditioning unit; if the low-frequency operating time is greater than a second preset time, it is determined that the air conditioning unit meets the oil return condition; otherwise, it is determined that the air conditioning unit does not meet the oil return condition.

[0033] The second preset duration can be set by the user or according to the actual operation of the air conditioning unit; no specific limitation is made here.

[0034] It is understood that if the low-frequency operating time of the air conditioning unit in this application embodiment is longer than a certain period of time, it is determined that the air conditioning unit meets the oil return condition; otherwise, it is determined that the oil return condition is not met, so that corresponding strategies can be made according to whether the oil return condition is met in the future.

[0035] In step S102, if the air conditioning unit meets the oil return conditions, the target speed of the current oil return cycle is obtained, the actual speed of the indoor fan in the air conditioning unit is adjusted to the target speed, and the actual pressure value of the air conditioning unit is detected after a preset running time.

[0036] The preset runtime can be set by the user or according to the actual situation; no specific limit is set here.

[0037] It is understood that, in this embodiment of the application, when the air conditioning unit meets the oil return conditions, the rotation speed of the current oil return cycle is obtained, the actual rotation speed of the indoor fan in the air conditioning unit is adjusted to the target rotation speed, and the actual pressure value of the air conditioning unit is detected after running for a period of time, which effectively reduces the operating pressure of the unit and avoids the situation where high pressure frequency limitation prevents entry into the oil return mode.

[0038] In this embodiment of the application, before detecting the actual pressure value of the air conditioning unit after a preset operating cycle, the method further includes: obtaining the actual temperature of the environment where the outdoor unit of the air conditioning unit is located; if the actual temperature is less than a first preset temperature, then the oil return threshold is a first threshold; if the actual temperature is greater than the first preset temperature, then the oil return threshold is a second threshold, wherein the first threshold is greater than the second threshold.

[0039] The first preset temperature can be set by the user or according to the actual situation of the air conditioning unit; no specific limitation is made here.

[0040] The first threshold can be a; the second threshold can be b, and a > b. The specific threshold can be selected based on the temperature and the model, and no specific limitation is made here.

[0041] It is understood that the embodiments of this application obtain the actual temperature of the environment where the outdoor unit of the air conditioning unit is located. If the actual temperature is greater than the set temperature, the compressor frequency can be increased to the pressure value of the oil return frequency when the unit is running. If it is greater than the set temperature, the compressor frequency can be increased to the pressure value of the oil return frequency when the unit is running. This is to facilitate the determination of the oil return threshold based on the actual temperature, which is beneficial for the next step of operation.

[0042] It should be noted that the target speed for the current oil return cycle can be calculated not only by the unit's fresh air ratio and internal plate temperature, but also by pressure and historical cycles, as detailed below:

[0043] As one possible implementation, obtaining the target speed of the current oil return cycle includes: obtaining the actual fresh air ratio and the actual inner wall temperature of the air conditioning unit; determining a correction coefficient based on the actual fresh air ratio; and calculating the target speed based on the ratio of the preset inner wall temperature to the actual inner wall temperature, the correction coefficient, and the actual speed of the inner fan.

[0044] The formula for calculating the target rotational speed is as follows:

[0045]

[0046] Where, r 目标 t: Target operating speed of the internal fan; k: Correction coefficient, which can be 1 / 2, 1 / 3, or 1 / 4, or selected according to the proportion of fresh air in the unit, without specific limitation here; 预设内盘温度 Target indoor unit coil temperature: 15, 18, or 20°C, depending on the unit size; larger units can have higher values. 实际内盘温度 Actual measured indoor unit coil temperature; r 运行 : Operating speed of the internal fan before pretreatment.

[0047] The actual proportion of fresh air is inversely proportional to the correction factor.

[0048] The preset inner plate temperature can be set to 15, 18, or 20 depending on the size of the model. For example, the larger the model, the higher the value can be selected. No specific limit is made here.

[0049] It is understood that the embodiments of this application can determine the correction coefficient through the actual fresh air ratio, and calculate the target speed based on the ratio of the preset inner plate temperature to the actual inner plate temperature, the correction coefficient and the actual speed of the inner fan, so as to adjust the actual speed of the inner fan of the air conditioning unit to the target speed in the future.

[0050] Specifically, the correction factor k can be 1 / 2, 1 / 3, or 1 / 4 (selected according to the proportion of fresh air in the unit): when the proportion of fresh air α is 50% < α < 100%, K is 1 / 4; when the proportion of fresh air α is 20% < α < 50%, K is 1 / 3; when the proportion of fresh air α is 0 < α < 50%, K is 1 / 2; since the temperature of fresh air is higher under high-temperature conditions, the higher the fresh air ratio, the smaller the value of K.

[0051] As another possible embodiment, obtaining the target speed of the current oil return cycle includes: detecting the actual running time of the air conditioning unit; if the actual running time is greater than a first preset time, obtaining the actual speed of the fan when the actual pressure value is less than or equal to the oil return threshold in multiple historical oil return cycles, and determining the target speed based on the average speed of multiple historical oil return cycles.

[0052] The first preset duration can be set by the user or according to the actual situation; no specific limitation is made here.

[0053] The oil return threshold can be set according to the actual usage requirements or model of the air conditioning unit, and no specific limit is made here.

[0054] The formula for calculating the target rotational speed is as follows:

[0055]

[0056] It is understood that the embodiments of this application detect whether the actual running time of the air conditioning unit is greater than the preset time. If it is greater than the preset time, the actual speed of the indoor fan is obtained when the actual pressure is less than or equal to the oil return threshold in multiple historical oil return cycles. The target speed is determined based on the average speed of multiple historical oil return cycles. The preset value of the indoor fan speed is determined by the calculation of pressure and previous cycle data. This can quickly adjust the unit to the correct position, reduce the impact of oil return on the actual use of customers, and improve user comfort.

[0057] In step S103, if the actual pressure value is less than or equal to the oil return threshold of the air conditioning unit, the air conditioning unit is controlled to enter the oil return mode; otherwise, the actual speed of the indoor fan is reduced according to the preset gradient until the actual pressure value is less than or equal to the oil return threshold.

[0058] The oil return threshold can be set according to the actual situation of the air conditioning unit, and no specific limitation is made here; the preset gradient can be calculated based on the actual pressure and historical cycle data, and no specific limitation is made here.

[0059] It is understood that in this embodiment of the application, when the actual pressure value is less than or equal to the oil return threshold of the air conditioning unit, the air conditioning unit is controlled to enter the oil return mode; otherwise, the speed of the indoor fan is reduced until the actual pressure value is less than the oil return threshold. This can effectively reduce the operating pressure of the unit, reduce the impact of oil return on the actual use of customers, improve user comfort, and meet the requirement of entering the oil return mode under high temperature conditions, thereby improving the reliability of unit operation.

[0060] According to the control method of the air conditioning unit proposed in the embodiments of this application, if the air conditioning unit meets the oil return condition, the target speed of the current cycle is calculated, and the speed of the indoor fan is adjusted to the target speed. After a certain running time, the actual pressure value of the air conditioning unit is detected. If the actual pressure value is less than or equal to the oil return threshold, the air conditioning unit is controlled to enter the oil return mode. Otherwise, the speed of the indoor fan is reduced until the actual pressure value is less than the oil return threshold. This can effectively reduce the operating pressure of the unit, reduce the impact of oil return on the actual use of customers, improve user comfort, meet the requirements of entering the oil return mode under high temperature conditions, and improve the operational reliability of the unit.

[0061] The control methods for air conditioning units are described in detail below:

[0062] (1) Record the low-frequency operating time of the unit to determine if the unit has entered the oil return mode. If the condition is met, proceed with the pre-processing stage to reduce the high voltage of the unit and avoid the situation where the high voltage frequency is limited and the unit cannot enter the oil return mode. The pre-processing control is as follows:

[0063] When the unit starts running for the first five cycles of oil return, the preset internal fan speed is determined based on the internal plate temperature, using the following formula:

[0064]

[0065] Where, r 目标 Target operating speed of the internal fan; K: Correction coefficient, which can be 1 / 2, 1 / 3, or 1 / 4 (selected according to the proportion of fresh air in the unit): When the proportion of fresh air α is 50% < α < 100%, K is 1 / 4;

[0066] When the fresh air ratio α is between 20% and 50%, K is taken as 1 / 3; when the fresh air ratio α is between 0% and 50%, K is taken as 1 / 2; because the fresh air temperature is higher under high-temperature conditions, the higher the fresh air ratio, the smaller the K value; t 预设内盘温度 The target indoor unit coil temperature can be set to 15, 18, or 20 degrees Celsius, depending on the unit size. Larger units can have higher values. 实际内盘温度 Actual measured indoor unit coil temperature; r 运行 : Operating speed of the internal fan before pretreatment.

[0067] Simultaneously, during pretreatment, a target high voltage Pd is applied to the unit. shWhen the outdoor ambient temperature TH1 < t1, Pd sh Take a; when the outdoor ambient temperature TH1 ≥ t1, Pd sh Take b; where t1 is the preset ambient temperature value, which can be selected according to different models; a and b are different pressure values, where a>b, because when the ambient temperature is low, the pressure at the same frequency is low, so the target high pressure can be higher; a and b are the pressure values ​​that the compressor frequency can rise to the oil return frequency when the unit is running.

[0068] (2) When the unit performs oil return pretreatment, the internal fan is first adjusted. 目标 Then, based on real-time pressure monitoring, the pressure is compared with the target pressure, and a certain period T is given. If the target pressure is not reached within T, the internal fan speed is reduced and the final pre-processing speed r is recorded. n Continue until the pressure reaches the target value. Once the pressure reaches the target value, the return oil can begin.

[0069] (3) Meanwhile, after the unit has been running for a period of time, in order to improve the accuracy and timeliness of pretreatment, the following adjustments are made to the selection of the internal fan speed:

[0070]

[0071] The arithmetic average of the values ​​of the fan speed in the pretreatment process, determined based on the pressure in the previous 5 oil return cycles, is used to determine the preset target speed r for this operation. 本周期 Then, adjustments are made based on changes in pressure to improve the pretreatment speed.

[0072] Therefore, the embodiments of this application can effectively reduce the operating pressure of the unit, thereby enabling the system to enter the oil return state and improve the operational reliability of the unit.

[0073] In summary, this application embodiment adjusts the indoor fan speed based on the unit's fresh air ratio and indoor panel temperature during high-temperature cooling, effectively reducing the unit's operating pressure. Furthermore, by calculating the pressure and previous cycle data, a preset value for the indoor fan speed is determined, enabling the unit to adjust quickly and minimizing the impact of oil return on actual customer use, thus improving user comfort. Moreover, since traditional control methods cannot enable the unit to enter oil return mode, this method allows the unit to enter oil return mode under high-temperature conditions, improving the unit's operational reliability.

[0074] Next, the control device for an air conditioning unit according to an embodiment of this application is described with reference to the accompanying drawings.

[0075] Figure 2 This is a block diagram of the control device of the air conditioning unit according to an embodiment of this application.

[0076] like Figure 2As shown, the control device 10 of the air conditioning unit includes: a detection module 100, a first processing module 200, and a second processing module 300.

[0077] The detection module 100 is used to detect whether the air conditioning unit meets the oil return conditions; the first processing module 200 is used to obtain the target speed of the current oil return cycle if the air conditioning unit meets the oil return conditions, adjust the actual speed of the indoor fan in the air conditioning unit to the target speed, and detect the actual pressure value of the air conditioning unit after a preset running time; the second processing module 300 is used to control the air conditioning unit to enter the oil return mode if the actual pressure value is less than or equal to the oil return threshold of the air conditioning unit, otherwise reduce the actual speed of the indoor fan according to the preset gradient until the actual pressure value is less than or equal to the oil return threshold.

[0078] It should be noted that the foregoing explanation of the control method embodiment for the air conditioning unit also applies to the control device of the air conditioning unit in this embodiment, and will not be repeated here.

[0079] According to the control device for the air conditioning unit proposed in the embodiments of this application, if the air conditioning unit meets the oil return condition, the target speed of the current cycle is calculated, and the speed of the indoor fan is adjusted to the target speed. After a certain running time, the actual pressure value of the air conditioning unit is detected. If the actual pressure value is less than or equal to the oil return threshold, the air conditioning unit is controlled to enter the oil return mode. Otherwise, the speed of the indoor fan is reduced until the actual pressure value is less than the oil return threshold. This can effectively reduce the operating pressure of the unit, reduce the impact of oil return on the actual use of customers, improve user comfort, meet the requirements of entering the oil return mode under high temperature conditions, and improve the reliability of unit operation.

[0080] Figure 3 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include:

[0081] The memory 301, the processor 302, and the computer program stored on the memory 301 and capable of running on the processor 302.

[0082] When the processor 302 executes the program, it implements the control method of the air conditioning unit provided in the above embodiments.

[0083] Furthermore, electronic devices also include:

[0084] Communication interface 303 is used for communication between memory 301 and processor 302.

[0085] The memory 301 is used to store computer programs that can run on the processor 302.

[0086] The memory 301 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0087] If the memory 301, processor 302, and communication interface 303 are implemented independently, then the communication interface 303, memory 301, and processor 302 can be interconnected via a bus to complete communication between them. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 3 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0088] Optionally, in a specific implementation, if the memory 301, processor 302, and communication interface 303 are integrated on a single chip, then the memory 301, processor 302, and communication interface 303 can communicate with each other through an internal interface.

[0089] Processor 302 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of this application.

[0090] This application also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the above-described control method for an air conditioning unit.

[0091] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0092] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0093] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0094] It should be understood that the various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, the N steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0095] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0096] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control method for an air conditioning unit, characterized in that, Includes the following steps: Check whether the air conditioning unit meets the oil return conditions; If the air conditioning unit meets the oil return conditions, the target speed of the current oil return cycle is obtained, the actual speed of the indoor fan in the air conditioning unit is adjusted to the target speed, and the actual pressure value of the air conditioning unit is detected after a preset running time. Obtaining the target speed of the current oil return cycle includes: obtaining the actual fresh air ratio and the actual indoor temperature of the air conditioning unit; determining a correction coefficient based on the actual fresh air ratio; and calculating the target speed based on the ratio of the preset indoor temperature to the actual indoor temperature, the correction coefficient, and the actual speed of the indoor fan. The actual fresh air ratio is inversely proportional to the correction coefficient. If the actual pressure value is less than or equal to the oil return threshold of the air conditioning unit, the air conditioning unit is controlled to enter the oil return mode; otherwise, the actual speed of the indoor fan is reduced according to a preset gradient until the actual pressure value is less than or equal to the oil return threshold. Before detecting the actual pressure value of the air conditioning unit after a preset running time, the method further includes: obtaining the actual temperature of the environment where the outdoor unit of the air conditioning unit is located; if the actual temperature is less than a first preset temperature, then the oil return threshold is a first threshold; if the actual temperature is greater than the first preset temperature, then the oil return threshold is a second threshold, wherein the first threshold is greater than the second threshold.

2. The method according to claim 1, characterized in that, The detection of whether the air conditioning unit meets the oil return conditions includes: Obtain the low-frequency operating time of the air conditioning unit; If the low-frequency operating time is greater than the second preset time, the air conditioning unit is determined to meet the oil return condition; otherwise, the air conditioning unit is determined not to meet the oil return condition.

3. The method according to claim 1 or 2, characterized in that, Before checking whether the air conditioning unit meets the oil return conditions, the following steps are also included: Obtain the actual temperature of the environment where the outdoor unit of the air conditioning unit is located; If the actual temperature is greater than the second preset temperature, the air conditioning unit is determined to be in a high-temperature operating condition, and it is checked whether the air conditioning unit meets the oil return conditions.

4. A control device for an air conditioning unit, characterized in that, include: The detection module is used to detect whether the air conditioning unit meets the oil return conditions; The first processing module is configured to, if the air conditioning unit meets the oil return conditions, obtain the target speed of the current oil return cycle, adjust the actual speed of the indoor fan in the air conditioning unit to the target speed, and detect the actual pressure value of the air conditioning unit after a preset running time. The process of obtaining the target speed of the current oil return cycle includes: obtaining the actual fresh air ratio and the actual inner wall temperature of the air conditioning unit; determining a correction coefficient based on the actual fresh air ratio; and calculating the target speed based on the ratio of the preset inner wall temperature to the actual inner wall temperature, the correction coefficient, and the actual speed of the indoor fan. The actual fresh air ratio is inversely proportional to the correction coefficient. The second processing module is used to control the air conditioning unit to enter the oil return mode if the actual pressure value is less than or equal to the oil return threshold of the air conditioning unit; otherwise, it reduces the actual speed of the indoor fan according to a preset gradient until the actual pressure value is less than or equal to the oil return threshold. Before detecting the actual pressure value of the air conditioning unit after a preset running time, the control device is used to: obtain the actual temperature of the environment where the outdoor unit of the air conditioning unit is located; if the actual temperature is less than a first preset temperature, then the oil return threshold is a first threshold; if the actual temperature is greater than the first preset temperature, then the oil return threshold is a second threshold, wherein the first threshold is greater than the second threshold.

5. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the control method for an air conditioning unit as described in any one of claims 1-3.

6. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the control method for the air conditioning unit as described in any one of claims 1-3.

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