Control method and device for quick oil return of air conditioner and air conditioner

Abstract

The invention relates to the technical field of air conditioners, and provides a control method and device for rapid oil return of an air conditioner and the air conditioner. The control method for rapid oil return of the air conditioner comprises the steps that the outdoor environment temperature is obtained; determining that the outdoor environment temperature meets a preset rapid oil return condition, and controlling a compressor of the air conditioner to execute a corresponding oil return strategy; the oil return strategy comprises adjustment of the operation frequency, the oil return duration and the frequency increasing speed of the compressor. Rapid oil return of the whole pipeline of the air conditioner can be guaranteed, operation noise of the compressor is reduced, and faults of the compressor caused by oil shortage abrasion are prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method and device for rapid oil return of an air conditioner, and the air conditioner. Background Art

[0002] During the use of existing air conditioners, the outdoor compressor runs continuously, and sometimes the oil return is not timely or there is no oil at the bottom of the compressor. Long-term operation often causes the compressor to make loud noises and wear, thus causing compressor failure. Summary of the Invention

[0003] The present invention provides a control method and device for rapid oil return of an air conditioner, and an air conditioner, which are used to solve the defects in the related art that the compressor has high noise and malfunctions due to untimely oil return or lack of oil. The method can ensure rapid oil return of the entire air conditioner pipeline, reduce the operating noise of the compressor, and prevent the compressor from malfunctioning due to lack of oil and wear.

[0004] The present invention provides a method for controlling rapid oil return of an air conditioner, comprising:

[0005] Get the outdoor ambient temperature;

[0006] Determining that the outdoor ambient temperature meets a preset rapid oil return condition, and controlling the compressor of the air conditioner to execute a corresponding oil return strategy;

[0007] The oil return strategy includes adjusting the operating frequency, oil return time and frequency increase speed of the compressor.

[0008] According to the present invention, a method for controlling rapid oil return of an air conditioner is provided, wherein the steps of determining that the outdoor ambient temperature meets a preset rapid oil return condition and controlling the compressor of the air conditioner to execute a corresponding oil return strategy include:

[0009] Determining that the outdoor ambient temperature meets a preset rapid oil return condition, and obtaining an operating mode of the air conditioner;

[0010] If the air conditioner is operated in cooling mode, controlling the compressor to execute a first oil return strategy;

[0011] If the air conditioner operates in a heating mode, the compressor is controlled to execute a second oil return strategy.

[0012] According to a method for controlling rapid oil return of an air conditioner provided by the present invention, if the air conditioner is operating in cooling mode, the step of controlling the compressor to execute a first oil return strategy includes:

[0013] If the air conditioner operates in cooling mode, the compressor is adjusted to a first operating frequency, a first oil return time, and a first frequency increase speed.

[0014] According to a method for controlling rapid oil return of an air conditioner provided by the present invention, if the air conditioner is operating in heating mode, the step of controlling the compressor to execute a second oil return strategy includes:

[0015] If the air conditioner is operated in heating mode, adjusting the compressor to a second operating frequency, a second oil return time, and a second frequency increase speed;

[0016] The first operating frequency is equal to the second operating frequency, the first oil return time is equal to the second oil return time, and the first frequency increase speed is greater than the second frequency increase speed.

[0017] A method for controlling rapid oil return of an air conditioner according to the present invention further includes:

[0018] Determining that the outdoor ambient temperature does not meet a preset rapid oil return condition, and obtaining an operating mode of the air conditioner;

[0019] If the air conditioner is operated in cooling mode, controlling the compressor to execute a third oil return strategy;

[0020] The oil return speed of the third oil return strategy is lower than the oil return speeds of the first oil return strategy and the second oil return strategy.

[0021] According to a method for controlling rapid oil return of an air conditioner provided by the present invention, if the air conditioner is operating in cooling mode, the step of controlling the compressor to execute a third oil return strategy includes:

[0022] If the air conditioner is operated in cooling mode, adjusting the compressor to a third operating frequency, a third oil return time, and a third frequency increase speed;

[0023] The third operating frequency is lower than the second operating frequency, the third oil return time is longer than the second oil return time, and the third frequency increase speed is lower than the second frequency increase speed.

[0024] A method for controlling rapid oil return of an air conditioner according to the present invention further includes:

[0025] If the air conditioner is operated in heating mode, obtaining the exhaust temperature of the compressor;

[0026] According to the exhaust temperature of the compressor, the compressor is controlled to execute a corresponding oil return strategy.

[0027] According to the present invention, a method for controlling rapid oil return of an air conditioner is provided, wherein the steps of controlling the compressor to execute a corresponding oil return strategy according to the exhaust temperature of the compressor include:

[0028] If the exhaust gas temperature of the compressor is greater than a preset value, controlling the compressor to execute the second oil return strategy;

[0029] If the exhaust temperature of the compressor is less than or equal to a preset value, the compressor is controlled to execute the third oil return strategy.

[0030] The present invention also provides a control device for rapid oil return of an air conditioner, comprising:

[0031] Acquisition module, used to obtain outdoor ambient temperature;

[0032] A control module, configured to determine whether the outdoor ambient temperature satisfies a preset rapid oil return condition and control the compressor of the air conditioner to execute a corresponding oil return strategy;

[0033] The oil return strategy includes adjusting the operating frequency, oil return time and frequency increase speed of the compressor.

[0034] The present invention also provides an air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, the method for controlling rapid oil return of the air conditioner is implemented.

[0035] The present invention provides a method, device, and air conditioner for controlling rapid oil return in an air conditioner. By acquiring the outdoor ambient temperature and determining that the outdoor ambient temperature meets preset rapid oil return conditions, the method controls the air conditioner's compressor to execute a corresponding oil return strategy, adjusting the compressor's operating frequency, oil return duration, and frequency ramp-up speed to achieve rapid oil return. Consequently, the present invention ensures rapid oil return throughout the air conditioner's pipelines, reduces compressor operating noise, and prevents compressor failures due to oil depletion and wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0037] Figure 1 This is one of the flow charts of the control method for rapid oil return of an air conditioner provided by the present invention;

[0038] Figure 2 This is the second flow chart of the control method for rapid oil return of an air conditioner provided by the present invention;

[0039] Figure 3 This is a schematic structural diagram of the control device for rapid oil return of an air conditioner provided by the present invention;

[0040] Figure 4 It is a structural schematic diagram of the air conditioner provided by the present invention.

[0041] Reference numerals:

[0042] 301: Acquisition module; 302: Control module;

[0043] 401: processor; 402: communication interface;

[0044] 403: memory; 404: communication bus. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0046] In the description of the embodiments of the present invention, it should be noted that the terms “first”, “second”, etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0047] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0048] The following combination Figure 1-Figure 4 The invention describes a method and device for controlling rapid oil return of an air conditioner and an air conditioner.

[0049] According to an embodiment of the first aspect of the present invention, referring to Figure 1 As shown, the control method for rapid oil return of an air conditioner provided by the present invention mainly includes the following steps:

[0050] S101: Obtain outdoor ambient temperature.

[0051] Specifically, the outdoor ambient temperature of the current air-conditioning outdoor unit can be monitored in real time or periodically obtained through a temperature sensor. This is a key parameter for determining which oil return strategy to adopt.

[0052] S102: Determine that the outdoor ambient temperature meets a preset rapid oil return condition, and control the compressor of the air conditioner to execute a corresponding oil return strategy;

[0053] Among them, the oil return strategy includes adjusting the operating frequency, oil return time and frequency increase speed of the compressor.

[0054] Specifically, based on a preset outdoor ambient temperature threshold (eg, greater than 18° C. in cooling mode, greater than -5° C. in heating mode, etc.), it is determined whether the conditions for executing rapid oil return are met.

[0055] When the outdoor ambient temperature meets the preset rapid oil return conditions, the compressor's operating status and related system parameters are automatically adjusted to achieve the goal of rapid oil return.

[0056] The specific contents of the oil return strategy include but are not limited to:

[0057] Adjust the operating frequency of the compressor: increase the compressor speed, change the refrigerant flow rate, and accelerate the circulation of lubricating oil back to the compressor.

[0058] Setting the oil return time: refers to adding an additional period of time specifically for oil return under specific working conditions to ensure sufficient oil return time.

[0059] Adjust the frequency increase speed: In variable frequency air conditioners, properly regulating the speed at which the compressor changes from low frequency to high frequency will help to quickly establish a good oil circulation during the compressor startup phase or when the load changes.

[0060] The control method for rapid oil return of an air conditioner provided in an embodiment of the present invention can dynamically adapt to working requirements under different ambient temperatures, effectively solve the oil return problem caused by changes in ambient temperature, thereby protecting the compressor from damage caused by oil shortage and ensuring stable and efficient operation of the air conditioner.

[0061] According to one embodiment of the present invention, the steps of determining that the outdoor ambient temperature meets a preset rapid oil return condition and controlling the compressor of the air conditioner to execute a corresponding oil return strategy include:

[0062] Determine that the outdoor ambient temperature meets the preset rapid oil return condition and obtain the operating mode of the air conditioner;

[0063] If the air conditioner is running in cooling mode, the compressor is controlled to execute the first oil return strategy;

[0064] If the air conditioner operates in heating mode, the compressor is controlled to execute the second oil return strategy.

[0065] In this embodiment of the present invention, the steps of executing the corresponding oil return strategy when the outdoor ambient temperature meets the preset rapid oil return condition are described in detail:

[0066] 1. Confirm that the outdoor ambient temperature meets the preset rapid oil return conditions and obtain the air conditioner operating mode:

[0067] When the outdoor ambient temperature reaches the set value (for example, greater than 18°C ​​in cooling mode, greater than -5°C in heating mode, etc.) in real time monitoring, the current working mode of the air conditioner is further identified as cooling mode or heating mode.

[0068] 2. Execute the corresponding rapid oil return strategy according to the air conditioner operating mode:

[0069] If the air conditioner is determined to be in cooling mode, the compressor is immediately controlled to operate according to the first oil return strategy. This strategy involves adjusting parameters such as the compressor's operating frequency, oil return time, and frequency ramp-up speed to accelerate the return rate of lubricating oil in the refrigeration cycle.

[0070] If the air conditioner is in heating mode, the compressor is controlled to execute the second oil return strategy. This strategy also optimizes the compressor operating parameters based on the characteristics of heating conditions to ensure a fast and effective oil return process.

[0071] Through the above-mentioned refined control method, the embodiment of the present invention can quickly switch to an appropriate fast oil return strategy according to the actual working conditions regardless of whether the air conditioner is in cooling mode or heating mode, thereby effectively preventing the wear and noise problems of the compressor caused by oil shortage, extending its service life, and ensuring the stable and efficient operation of the air-conditioning system.

[0072] According to one embodiment of the present invention, if the air conditioner is operating in cooling mode, the step of controlling the compressor to execute the first oil return strategy includes:

[0073] If the air conditioner is operated in cooling mode, the compressor is adjusted to a first operating frequency, a first oil return time, and a first frequency increase speed.

[0074] Furthermore, if the air conditioner is operated in the heating mode, the step of controlling the compressor to execute the second oil return strategy includes:

[0075] If the air conditioner is operated in heating mode, adjusting the compressor to a second operating frequency, a second oil return time, and a second frequency increase speed;

[0076] The first operating frequency is equal to the second operating frequency, the first oil return time is equal to the second oil return time, and the first frequency increase speed is greater than the second frequency increase speed.

[0077] In this embodiment of the present invention, in cooling mode and heating mode, the specific steps of the air conditioner compressor implementing the rapid oil return strategy are further refined as follows:

[0078] 1. The first oil return strategy in cooling mode:

[0079] When the air conditioner is operating in cooling mode, the operating frequency of the compressor is adjusted to a pre-set first operating frequency. This frequency design is intended to promote the return of lubricating oil by appropriately increasing the refrigerant circulation speed.

[0080] At the same time, a specific first oil return time is set to ensure that the compressor operates under conditions conducive to oil return during this time period.

[0081] The first frequency increase speed is set to be greater than the second frequency increase speed, which means that in the process of starting from low frequency or adjusting to high frequency, the speed increase rate of the compressor in cooling mode is faster, so as to establish a good oil film in a shorter time, thereby improving lubrication, cooling and vibration reduction effects.

[0082] 2. Second oil return strategy in heating mode:

[0083] If the air conditioner is operating in heating mode, the operating frequency of the compressor will also be adjusted accordingly, set to the second operating frequency that is the same as the cooling mode, to increase the oil return speed.

[0084] In heating mode, the compressor also has a preset second oil return time, which is the same as the cooling mode to ensure sufficient oil return time.

[0085] The difference is that the ramp-up speed in heating mode is slower, meaning the second ramp-up speed is slower than the first. This design takes into account factors such as system pressure, temperature changes, and lubrication requirements during the heating process, and avoids excessively high exhaust temperatures or other adverse effects caused by excessively fast ramp-up.

[0086] Through the above-mentioned differentiated control method, the embodiment of the present invention can accurately adjust the working state of the compressor according to the respective characteristics of the cooling and heating modes, thereby achieving a fast and effective oil return effect, ensuring the stable operation of the air-conditioning compressor and extending its service life.

[0087] According to one embodiment of the present invention, the method for controlling rapid oil return of an air conditioner of the present invention further includes:

[0088] Determining that the outdoor ambient temperature does not meet a preset rapid oil return condition, and obtaining an operating mode of the air conditioner;

[0089] If the air conditioner is running in cooling mode, the compressor is controlled to execute the third oil return strategy;

[0090] The oil return speed of the third oil return strategy is lower than the oil return speeds of the first oil return strategy and the second oil return strategy.

[0091] Specifically, when the outdoor ambient temperature meets the preset rapid oil return condition, if the air conditioner operates in cooling mode, the compressor executes the first oil return strategy;

[0092] When the outdoor ambient temperature does not meet the preset rapid oil return conditions, if the air conditioner operates in cooling mode, a more conservative or conventional third oil return strategy will be adopted.

[0093] For example, when the outdoor ambient temperature is high (over 18°C) in cooling mode:

[0094] A more proactive or enhanced lubricating oil circulation management method, namely the first oil return strategy, will be implemented. By flexibly adjusting the compressor's operating parameters such as operating frequency, oil return time and frequency increase speed, the efficient circulation of lubricating oil in the system will be promoted, and the lubricating oil will be quickly returned and effectively distributed, ensuring that the compressor is fully lubricated and protected while operating efficiently, thereby reducing noise and wear and improving compressor operating efficiency.

[0095] In cooling mode, when the outdoor ambient temperature is not higher than 18°C:

[0096] The relatively stable or conservative third oil return strategy utilizes a lower oil circulation rate than the aforementioned rapid oil return strategy. This strategy meets the normal lubrication needs of compressors in low-temperature environments, ensuring basic compressor lubrication while balancing energy savings and system stability, avoiding unnecessary energy consumption or other problems caused by over-lubrication.

[0097] According to one embodiment of the present invention, if the air conditioner is operating in cooling mode, the step of controlling the compressor to execute the third oil return strategy includes:

[0098] If the air conditioner is operated in cooling mode, the compressor is adjusted to a third operating frequency, a third oil return time, and a third frequency increase speed;

[0099] The third operating frequency is lower than the second operating frequency, the third oil return time is longer than the second oil return time, and the third frequency increase speed is lower than the second frequency increase speed.

[0100] In this embodiment of the present invention, a control method for executing the third oil return strategy in the cooling mode is described in detail as follows:

[0101] 1. Adjust the compressor to the third operating frequency:

[0102] When the air conditioner is in cooling mode and rapid oil return conditions are not met, the system adjusts the compressor operating frequency to a lower third operating frequency. This means that compared to the second oil return strategy (rapid oil return in heating mode), the compressor will run at a lower speed under normal oil return conditions in cooling mode.

[0103] 2. Set the third oil return time:

[0104] Similarly, when executing the third oil return strategy, the system will set a longer third oil return time to ensure that the lubricating oil has sufficient time to flow through the entire refrigeration system at a slower operating frequency and eventually return to the compressor for adequate lubrication.

[0105] 3. Determine the third upscaling speed:

[0106] The third frequency ramp-up speed is slower than the second, meaning that in cooling mode, the compressor speed increases more gradually from low to high frequency. This design helps prevent lubricant from being delayed in returning to the compressor due to excessively rapid frequency ramp-up, ensuring optimal lubrication and protection for the compressor regardless of operating conditions.

[0107] In summary, by adopting the more conservative and stable third oil return strategy, when the outdoor ambient temperature does not meet the rapid oil return conditions in cooling mode, the risk of compressor wear can be effectively reduced, the service life of the equipment can be extended, and the overall performance stability and energy saving effect of the air-conditioning system can be maintained.

[0108] According to one embodiment of the present invention, the method for controlling rapid oil return of an air conditioner of the present invention further includes:

[0109] Determining that the outdoor ambient temperature does not meet a preset rapid oil return condition, and obtaining an operating mode of the air conditioner;

[0110] If the air conditioner is running in cooling mode, the compressor is controlled to execute the third oil return strategy;

[0111] If the air conditioner is operating in heating mode, obtain the compressor outlet temperature;

[0112] According to the exhaust gas temperature of the compressor, the compressor is controlled to execute the corresponding oil return strategy.

[0113] In this embodiment of the present invention, when the outdoor ambient temperature does not meet the preset rapid oil return conditions, the system takes the following steps:

[0114] 1. If the outdoor ambient temperature does not meet the preset rapid oil return conditions, the operating mode of the air conditioner will be further determined.

[0115] 2. For operation in cooling mode:

[0116] If the air conditioner is operating in cooling mode and the outdoor ambient temperature does not meet the conditions for rapid oil return, the third oil return strategy will be implemented. This strategy involves adjusting the compressor's operating frequency, oil return time, and frequency ramp-up speed. Its characteristic is that it returns oil more slowly than the first oil return strategy (rapid oil return in cooling mode).

[0117] 3. Further judgment on heating mode:

[0118] When the air conditioner is operating in heating mode, since the outdoor ambient temperature does not meet the fast oil return condition, in addition to considering the ambient temperature, the compressor exhaust temperature will also be obtained.

[0119] 4. Adjust the oil return strategy based on the exhaled air temperature:

[0120] Based on the compressor's discharge temperature, the system will determine the appropriate oil return strategy. For example, if the discharge temperature is too high (e.g., over 35°C), it may indicate significant heat accumulation within the system, necessitating increased lubricating oil circulation to cool and lubricate the compressor components. In this case, the second oil return strategy can be adopted. Conversely, if the discharge temperature is low or within the normal range, the more conservative third oil return strategy will continue.

[0121] The control method of the embodiment of the present invention flexibly adjusts the oil return strategy not only according to the outdoor ambient temperature, but also in combination with the actual working state of the compressor (such as the exhaled air temperature), thereby ensuring effective and appropriate lubricating oil management under various working conditions, thereby ensuring the stable operation of the compressor and extending its service life.

[0122] According to one embodiment of the present invention, the step of controlling the compressor to execute a corresponding oil return strategy according to the discharge temperature of the compressor includes:

[0123] If the exhaust gas temperature of the compressor is greater than the preset value, the compressor is controlled to execute the second oil return strategy;

[0124] If the discharge air temperature of the compressor is less than or equal to the preset value, the compressor is controlled to execute the third oil return strategy.

[0125] In this embodiment of the present invention, the system adopts the following strategy to determine which oil return solution to implement based on the compressor discharge temperature in heating mode:

[0126] 1. Judging by the exhaust temperature of the compressor:

[0127] When the compressor's exhaust temperature is detected to be greater than the preset value, it indicates that there may be a large amount of heat accumulation inside the air-conditioning system, or the operating status requires enhanced lubrication management to ensure the safe and efficient operation of the compressor.

[0128] 2. Execute the second oil return strategy:

[0129] If the compressor's discharge temperature exceeds a set threshold, the system switches to the second oil return strategy. This strategy involves increasing the compressor's operating frequency, optimizing the oil return schedule, or adjusting the frequency ramp-up rate to enhance lubricant circulation efficiency. This strategy effectively protects the compressor's lubrication by monitoring the discharge temperature, even when the rapid oil return conditions set based on the outdoor ambient temperature are not met.

[0130] 3. Execute the third oil return strategy:

[0131] Conversely, if the compressor's discharge temperature is less than or equal to the preset value, the current operating conditions are relatively mild, and a more conventional or conservative third oil return strategy can be adopted. This strategy sets the compressor's operating parameters more towards energy conservation and stability, avoiding unnecessary energy consumption increases while maintaining the compressor's basic lubrication requirements.

[0132] The embodiment of the present invention realizes more refined and intelligent oil return control of the air conditioner by real-time monitoring of the compressor exhaust temperature and adjusting the oil return strategy accordingly, effectively ensuring good lubrication of the compressor under various complex working conditions, reducing noise and wear, and extending the service life of the equipment.

[0133] The control method for rapid oil return of an air conditioner provided by the present invention is further described below with reference to a specific example. Figure 2 As shown, it generally includes:

[0134] (1) When the air conditioner is started and enters the operating state, first identify whether the air conditioner is in cooling mode or heating mode;

[0135] (2) When the air conditioner is running in cooling mode, it detects and determines in real time whether the outdoor ambient temperature Tao is greater than 18°C. If so, the first oil return strategy is executed, which includes adjusting the compressor frequency to 68 Hz, the oil return time to 30 s, and the frequency increase rate to 3 Hz / s to promote the rapid return of lubricating oil to the compressor. If not, the conventional third oil return strategy is executed, which includes adjusting the compressor frequency to 58 Hz, the oil return time to 60 s, and the frequency increase rate to 1 Hz / s to ensure basic lubrication needs while taking into account energy saving effects.

[0136] (3) When the air conditioner is running in heating mode, it is also detected and judged whether the outdoor ambient temperature Tao is greater than -5°C. If so, the second oil return strategy is executed, which includes adjusting the compressor frequency to 68 Hz, the oil return time to 30 s, and the frequency increase rate to 2 Hz / s to achieve rapid oil return. If not, the compressor outlet temperature Ts is further detected as an additional judgment condition;

[0137] (4) Determine whether the compressor's outlet temperature Ts is greater than 35°C. If so, it means that there may be a high internal heat accumulation. At this time, the second oil return strategy still needs to be implemented to speed up the lubricating oil circulation to cool the compressor and ensure its good lubrication. If not, the third oil return strategy is also adopted to maintain a relatively stable oil return rate.

[0138] Therefore, the embodiment of the present invention flexibly switches the oil return strategy under different working environments through refined temperature threshold setting and real-time parameter monitoring, thereby effectively protecting the operating performance and service life of the air-conditioning compressor and improving the stability and efficiency of the overall system.

[0139] The following continues to describe the control device for rapid oil return of an air conditioner provided by the present invention. The control device for rapid oil return of an air conditioner described below and the control method for rapid oil return of an air conditioner described above can refer to each other.

[0140] According to an embodiment of the second aspect of the present invention, referring to Figure 3 As shown, the present invention also provides a control device for rapid oil return of an air conditioner, which mainly includes: an acquisition module 301 and a control module 302, the acquisition module 301 is used to obtain the outdoor ambient temperature; the control module 302 is used to determine whether the outdoor ambient temperature meets the preset rapid oil return conditions, and control the compressor of the air conditioner to execute the corresponding oil return strategy; wherein the oil return strategy includes adjusting the operating frequency, oil return time and frequency increase speed of the compressor.

[0141] The air conditioner rapid oil return control device of the present invention is designed with specialized hardware and software modules to implement intelligent and dynamic oil return control. The specific structure is as follows:

[0142] 1. Get module 301:

[0143] This module is primarily responsible for real-time monitoring or periodic acquisition of outdoor ambient temperature data. It can include a temperature sensor and related signal processing circuitry to ensure accurate capture of the actual outdoor temperature.

[0144] 2. Control module 302:

[0145] The control module 302 is the core part of the entire oil return control device. It makes judgments based on the outdoor ambient temperature information provided by the acquisition module 301 and formulates and executes corresponding oil return strategies accordingly.

[0146] When the outdoor ambient temperature meets the preset rapid oil return condition, the control module 302 will immediately adjust the operating parameters of the air-conditioning compressor to implement the rapid oil return strategy.

[0147] The specific content of the oil return strategy includes but is not limited to adjusting the operating frequency of the compressor, that is, changing the compressor speed through frequency conversion technology to speed up the refrigerant circulation speed and promote the faster return of lubricating oil to the compressor;

[0148] Adjust the oil return time, that is, increase the time period of oil return operation under specific working conditions;

[0149] Set the ramp-up speed to control the ramp-up process when the compressor starts or the load changes to promote uniform distribution of lubricating oil and timely return to key parts of the compressor.

[0150] The air conditioner rapid oil return control device provided in the embodiment of the present invention can realize precise management of the oil circuit of the air conditioner compressor, ensuring efficient and rapid oil return under different environmental conditions, thereby effectively protecting the compressor from wear caused by oil shortage, reducing operating noise, and improving the overall performance and service life of the air conditioning system.

[0151] According to an embodiment of the third aspect of the present invention, referring to Figure 4 As shown, the present invention also provides an air conditioner, which may include: a processor 401, a communications interface 402, a memory 403, and a communications bus 404, wherein the processor 401, the communications interface 402, and the memory 403 communicate with each other via the communications bus 404. The processor 401 may call logic instructions in the memory 403 to execute a method for controlling rapid oil return for the air conditioner. The method includes: obtaining an outdoor ambient temperature; determining whether the outdoor ambient temperature meets a preset rapid oil return condition, and controlling the air conditioner's compressor to execute a corresponding oil return strategy; wherein the oil return strategy includes adjusting the compressor's operating frequency, oil return duration, and frequency ramp-up speed.

[0152] In addition, the logic instructions in the above-mentioned memory 403 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when sold or used as an independent product. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.

[0153] On the other hand, the present invention also provides a computer program product, which includes a computer program, which can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the air conditioner rapid oil return control method provided by the above methods, the method including: obtaining the outdoor ambient temperature; determining whether the outdoor ambient temperature meets the preset rapid oil return condition, and controlling the compressor of the air conditioner to execute the corresponding oil return strategy; wherein the oil return strategy includes adjusting the operating frequency, oil return time and frequency increase speed of the compressor.

[0154] On the other hand, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, it is implemented to execute the control method for rapid oil return of the air conditioner provided by the above-mentioned methods. The method includes: obtaining the outdoor ambient temperature; determining whether the outdoor ambient temperature meets the preset rapid oil return conditions, and controlling the compressor of the air conditioner to execute the corresponding oil return strategy; wherein the oil return strategy includes adjusting the operating frequency, oil return time and frequency increase speed of the compressor.

[0155] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Persons of ordinary skill in the art will be able to understand and implement the present invention without inventive effort.

[0156] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, or of course, by hardware. Based on this understanding, the essence of the above technical solution or the part that contributes to the existing technology can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or certain parts of the embodiments.

[0157] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for controlling rapid oil return of an air conditioner, characterized in that: include: Get the outdoor ambient temperature; Determining that the outdoor ambient temperature meets a preset rapid oil return condition, and controlling the compressor of the air conditioner to execute a corresponding oil return strategy; The oil return strategy includes adjusting the operating frequency, oil return time and frequency increase speed of the compressor.

2. The method for controlling rapid oil return of an air conditioner according to claim 1, characterized in that: The step of determining that the outdoor ambient temperature meets a preset rapid oil return condition and controlling the compressor of the air conditioner to execute a corresponding oil return strategy includes: Determining that the outdoor ambient temperature meets a preset rapid oil return condition, and obtaining an operating mode of the air conditioner; If the air conditioner is operated in cooling mode, controlling the compressor to execute a first oil return strategy; If the air conditioner operates in a heating mode, the compressor is controlled to execute a second oil return strategy.

3. The method for controlling rapid oil return of an air conditioner according to claim 2, characterized in that: If the air conditioner is operated in cooling mode, the step of controlling the compressor to execute a first oil return strategy includes: If the air conditioner operates in cooling mode, the compressor is adjusted to a first operating frequency, a first oil return time, and a first frequency increase speed.

4. The method for controlling rapid oil return of an air conditioner according to claim 3, characterized in that: If the air conditioner is operated in heating mode, the step of controlling the compressor to execute the second oil return strategy includes: If the air conditioner is operated in heating mode, adjusting the compressor to a second operating frequency, a second oil return time, and a second frequency increase speed; The first operating frequency is equal to the second operating frequency, the first oil return time is equal to the second oil return time, and the first frequency increase speed is greater than the second frequency increase speed.

5. The method for controlling rapid oil return of an air conditioner according to claim 4, characterized in that: Also includes: Determining that the outdoor ambient temperature does not meet a preset rapid oil return condition, and obtaining an operating mode of the air conditioner; If the air conditioner is operated in cooling mode, controlling the compressor to execute a third oil return strategy; The oil return speed of the third oil return strategy is lower than the oil return speeds of the first oil return strategy and the second oil return strategy.

6. The method for controlling rapid oil return of an air conditioner according to claim 5, characterized in that: If the air conditioner is operated in cooling mode, the step of controlling the compressor to execute the third oil return strategy includes: If the air conditioner is operated in cooling mode, adjusting the compressor to a third operating frequency, a third oil return time, and a third frequency increase speed; The third operating frequency is lower than the second operating frequency, the third oil return time is longer than the second oil return time, and the third frequency increase speed is lower than the second frequency increase speed.

7. The method for controlling rapid oil return of an air conditioner according to claim 5, characterized in that: Also includes: If the air conditioner is operated in heating mode, obtaining the exhaust temperature of the compressor; According to the exhaust temperature of the compressor, the compressor is controlled to execute a corresponding oil return strategy.

8. The method for controlling rapid oil return of an air conditioner according to claim 7, characterized in that: The step of controlling the compressor to execute a corresponding oil return strategy according to the exhaust gas temperature of the compressor includes: If the exhaust gas temperature of the compressor is greater than a preset value, controlling the compressor to execute the second oil return strategy; If the exhaust temperature of the compressor is less than or equal to a preset value, the compressor is controlled to execute the third oil return strategy.

9. A control device for rapid oil return of an air conditioner, characterized in that: include: Acquisition module, used to obtain outdoor ambient temperature; A control module, configured to determine whether the outdoor ambient temperature satisfies a preset rapid oil return condition and control the compressor of the air conditioner to execute a corresponding oil return strategy; The oil return strategy includes adjusting the operating frequency, oil return time and frequency increase speed of the compressor.

10. An air conditioner comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the method for controlling rapid oil return of the air conditioner according to any one of claims 1 to 8 is implemented.

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