Air conditioner and control method thereof

Abstract

The invention relates to an air conditioner and a control method thereof, and belongs to the technical field of air conditioners. The air conditioner comprises an outdoor coil, a fan, a compressor, an environment temperature sensor, an outdoor coil temperature sensor and a controller; the controller controls the fan to operate after refrigeration of the air conditioner is started, and the outdoor environment temperature T2 and the outdoor coil pipe temperature are obtained; after the first time period, the compressor is controlled to operate, and the outdoor environment temperature T1 of the compressor in the second time period is obtained; according to the difference value between the outdoor environment temperature T1 and the outdoor environment temperature T2, whether the air conditioner is in an installation environment with poor ventilation or not is judged; if the difference value is larger than a third threshold value, it is judged that the air conditioner is in the poor ventilation installation environment, and the protection value of the outdoor coil pipe temperature is adjusted; otherwise, the protection value of the temperature of the outdoor coil is not adjusted, the reliability of the air conditioner is guaranteed, the refrigerating capacity in the high-temperature environment is improved, and the problem that the refrigerating capacity is suddenly reduced when ventilation is poor in a traditional fixed protection value scheme is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner and a control method thereof. Background Art

[0002] Air conditioners are typically installed in well-ventilated, open spaces, such as building exterior walls, rooftops, or dedicated platforms. Under standard operating conditions, the outdoor fan drives air through the outdoor coil, enabling efficient heat exchange between the refrigerant and the outside air. This maintains the outdoor coil temperature within a reasonable range, stabilizes the air conditioner's pressure, and maximizes cooling capacity.

[0003] When an air conditioner is installed in a poorly ventilated environment (such as inside a grille, in a narrow patio, or near a wall), air flow is restricted, significantly reducing heat exchange efficiency. This can cause the outdoor coil temperature to rise rapidly, causing the pressure on the high-pressure side of the system to rise and increasing the load on the compressor. Under these high-temperature and high-pressure conditions, the system is prone to triggering overload protection, significantly reducing cooling capacity. Furthermore, due to insufficient heat dissipation from the outdoor coil, the compressor remains under high load for extended periods, reducing system energy efficiency and potentially shortening the equipment's lifespan.

[0004] Existing technology primarily relies on fixed outdoor coil temperature protection values to control air conditioners in poorly ventilated environments. When the outdoor coil temperature is detected as excessively high, the air conditioner will reduce its frequency or shut down to prevent damage. However, this approach fails to fully consider the actual impact of different installation environments on heat dissipation. As a result, in scenarios with severely restricted ventilation, the air conditioner frequently enters protection mode, and its cooling capacity fails to meet user needs. Furthermore, traditional control strategies lack adaptability to short-term high-temperature conditions, making it difficult to optimize operational efficiency while ensuring system reliability. Summary of the Invention

[0005] This application provides an air conditioner and control method thereof, at least to address the problem in related art where air conditioner control in poorly ventilated environments primarily relies on a fixed outdoor coil temperature protection value. When the outdoor coil temperature is detected to be too high, the air conditioner will reduce frequency or shut down to prevent damage. However, this method fails to fully consider the actual impact of different installation environments on heat dissipation. As a result, in scenarios with severely restricted ventilation, the air conditioner frequently enters a protection state, and its cooling capacity cannot meet user needs.

[0006] In a first aspect, the present application provides an air conditioner, comprising: Outdoor coil, which is used to exchange heat with the outside air; a fan for driving air to flow through the outdoor coil; A compressor, configured to compress refrigerant gas and deliver the refrigerant gas to the outdoor coil for circulation; Ambient temperature sensor, used to detect outdoor ambient temperature; Outdoor coil temperature sensor, used to detect outdoor coil temperature; A controller electrically connected to the compressor, the fan, the ambient temperature sensor, and the outdoor coil temperature sensor; the controller is configured to: After the air conditioner is started for cooling, the fan is controlled to operate, and the outdoor ambient temperature T2 and the outdoor coil temperature during the second period of operation of the compressor are obtained; After the first time period, the compressor is controlled to operate and the outdoor ambient temperature T1 is obtained; determining whether the air conditioner is in a poorly ventilated installation environment according to a difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2; If the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than a third threshold, it is determined that the air conditioner is installed in a poorly ventilated environment, and the protection value of the outdoor coil temperature is adjusted; Otherwise, it is determined that the air conditioner is not installed in a poorly ventilated environment, and the protection value of the outdoor coil temperature is not adjusted.

[0007] When the air conditioner is installed in a normal environment, the outdoor ambient temperature T1 is not much different from the outdoor ambient temperature T2. If the air conditioner is installed in an environment with poor ventilation, the operation of the fan will cause the outdoor ambient temperature T1 to rise rapidly, resulting in the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 being greater than the third threshold.

[0008] When it is detected that the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than the third threshold, the coil temperature protection value is increased, allowing the system to continue operating at a higher temperature, extending the effective cooling time and reducing the number of times the protection shutdown is triggered.

[0009] In some embodiments, the controller is further configured to: determining whether the air conditioner is in a high temperature environment according to whether the outdoor environment temperature T1 is greater than a first threshold; If the outdoor environment temperature T1 is greater than the first threshold, it is determined that the air conditioner is in a high temperature environment, and further determined whether the air conditioner is in a grille environment; Otherwise, it is determined that the air conditioner is not in a high temperature environment, and the protection value of the outdoor coil temperature is not adjusted.

[0010] By determining whether the outdoor ambient temperature T1 during the second period of compressor operation is higher than a first threshold, it can be determined whether the air conditioner is in a high temperature environment.

[0011] When the outdoor ambient temperature T1 is greater than the first threshold, it indicates that the current air conditioner is in a high temperature period with a short annual cumulative operating time. At this time, the air conditioner is allowed to appropriately increase the upper limit of the operating parameters.

[0012] When the outdoor ambient temperature T1 is greater than the first threshold, the heat dissipation load of the air conditioner increases significantly, and the influence of shielding objects such as grilles on heat dissipation is aggravated.

[0013] The judgment logic of the grille environment is triggered only in high-temperature environments, reducing redundant detection in low-temperature scenarios, improving system judgment efficiency, and avoiding unnecessary protection actions caused by misjudgment.

[0014] In some embodiments, the controller is further configured to: After determining that the air conditioner is in a high temperature environment, determining whether the air conditioner is in a grille environment based on whether the difference between the outdoor coil temperature and the outdoor environment temperature T2 is less than a second threshold; If the difference between the outdoor coil temperature and the outdoor ambient temperature T2 is less than a second threshold, it is determined that the air conditioner is in a grille environment, and further determined whether the air conditioner is in a poorly ventilated installation environment; Otherwise, it is determined that the air conditioner is not in a grille environment, and the protection value of the outdoor coil temperature is not adjusted.

[0015] By comparing whether the difference between the outdoor coil temperature and the outdoor ambient temperature T2 is less than the second threshold, it can be accurately determined whether the air conditioner is in a grille environment.

[0016] When the air conditioner is in a grille environment, the heat exchange efficiency between the outdoor coil and the ambient air decreases, causing the difference between the outdoor coil temperature and the outdoor ambient temperature T2 to be significantly lower than normal.

[0017] The temperature difference feature is used to identify the physically blocked grille environment and improve the recognition accuracy.

[0018] In some embodiments, the controller is further configured to: When it is determined that the air conditioner is installed in a poorly ventilated environment, the protection value of the outdoor coil temperature is increased by a corresponding compensation value according to the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs, wherein different preset temperature difference ranges correspond to different compensation values.

[0019] The protection value compensation amount is dynamically adjusted according to the quantitative classification of the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs, so as to achieve refined matching of the protection strategy and achieve the optimal balance between safe operation and energy efficiency.

[0020] A smaller compensation value can cope with minor heat dissipation obstructions and avoid frequent shutdowns, while a larger compensation value can ensure that the air conditioner can continue to operate in extreme scenarios.

[0021] In some embodiments, the controller is further configured to: The compensation value increases as the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs increases.

[0022] By setting a nonlinear relationship in which the compensation value increases with the temperature difference, a proportional response between the protection strength and the risk level is achieved, ensuring that the system can obtain optimal protection under different ventilation conditions.

[0023] When the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 falls within a small preset temperature difference range, the system only needs to slightly increase the protection value to maintain stability; When the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 falls within a large preset temperature difference range, it indicates that the heat dissipation of the air conditioner is severely obstructed and the protection value needs to be significantly increased to avoid high voltage risks.

[0024] In some embodiments, the controller is further configured to: When it is determined that the air conditioner is installed in a poorly ventilated environment, the operating frequency of the compressor is increased according to a preset temperature difference range within which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs.

[0025] In an installation environment with poor ventilation, the operating frequency of the compressor is increased, thereby increasing the refrigerant circulation volume and compensating for the decrease in heat exchange efficiency caused by poor ventilation.

[0026] In some embodiments, the controller is further configured to: The operating frequency of the compressor increases as the compensation value of the protection value of the outdoor coil temperature increases.

[0027] Establish a positive proportional relationship between the compressor operating frequency and the protection value compensation amount to achieve dynamic load matching, ensuring that the air conditioner can not only improve the cooling capacity in extreme environments but also prevent the system from over-temperature operation.

[0028] Ensure that the increase in the compressor's operating frequency always matches the air conditioner's heat resistance. Make full use of the compressor's short-term overload capacity and avoid the risk of over-regulation.

[0029] In some embodiments, the controller is further configured to: After adjusting the protection value of the outdoor coil temperature, the change rate of the refrigerant gas temperature delivered by the compressor is obtained. If the change rate of the refrigerant gas temperature delivered by the compressor exceeds a preset safety threshold, the operating frequency of the compressor is reduced.

[0030] By monitoring the refrigerant temperature change rate in real time, a fast-response safety feedback mechanism is established during the dynamic adjustment process to prevent potential overheating risks caused by increased protection values.

[0031] When the protection value is increased, if the compressor operating frequency increases rapidly, the refrigerant temperature may rise sharply. Even if the current temperature does not reach the new protection value, there is still a risk of overheating.

[0032] When the rate of change of the refrigerant gas temperature delivered by the compressor exceeds the preset safety threshold, the compressor operating frequency is immediately reduced while maintaining the fan at high speed, which can reduce the refrigerant temperature peak and improve system stability.

[0033] In some embodiments, the controller is further configured to: When it is determined that the air conditioner is installed in a poorly ventilated environment, the rotation speed of the fan is increased according to the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs.

[0034] In a poorly ventilated environment, the fan speed is linked with the preset temperature difference range of the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 to enhance the forced convection heat dissipation effect, forming a synergistic effect with the protection value adjustment, and further improving the system's risk resistance.

[0035] By increasing the fan speed, the air velocity on the surface of the outdoor coil can be increased, thereby improving the heat transfer coefficient.

[0036] In a second aspect, the present application provides an air conditioner control method, comprising: The air conditioner starts cooling, starts running the fan, and detects the outdoor ambient temperature T2 through the ambient temperature sensor; Detect the outdoor coil temperature through the outdoor coil temperature sensor; After the first time period, the compressor is started and the outdoor ambient temperature T1 during the second time period of the compressor operation is detected by the ambient temperature sensor; determining whether the air conditioner is in a poorly ventilated installation environment according to a difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2; If the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than a third threshold, it is determined that the air conditioner is installed in a poorly ventilated environment, and the protection value of the outdoor coil temperature is adjusted; Otherwise, it is determined that the air conditioner is not installed in a poorly ventilated environment, and the protection value of the outdoor coil temperature is not adjusted.

[0037] Compared with related technologies, the control method provided by the present invention first starts the fan to obtain initial environmental parameters, and then starts the compressor to detect operating parameters, thereby establishing a time-series environmental status detection process.

[0038] The temperature difference judgment logic is simple and reliable, accurately identifying signs of poor ventilation. Dynamic adjustment of the outdoor coil temperature protection value ensures that the identification results are translated into effective control actions. This creates a complete closed loop from environmental detection to parameter adjustment, automatically adapting to different installation environments without manual intervention, significantly improving the air conditioner's adaptability in complex operating conditions.

[0039] The details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide an understanding of the present application and constitute a part of the present application. The exemplary embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 1 is a schematic diagram showing the corresponding relationship between the operating frequency of the compressor and the condensing pressure and evaporating pressure according to an embodiment of the present application; Figure 2 is a structural diagram of an air conditioner according to an embodiment of the present application; Figure 3 This is the operating process of the controller according to the embodiment of the present application Figure 1 ; Figure 4 This is the operating process of the controller according to the embodiment of the present application Figure 2 ; Figure 5 This is the operating process of the controller according to the embodiment of the present application Figure 3 ; Figure 6 This is the operating process of the controller according to the embodiment of the present application Figure 4 ; Figure 7 The operation process of the air conditioner according to the embodiment of the present application is Figure 5 ; Figure 8 The operation process of the air conditioner according to the embodiment of the present application is Figure 6 ; Figure 9 is a flow chart of an air conditioner control method according to an embodiment of the present application; Figure 10It is a hardware configuration diagram of the controller according to an embodiment of the present application.

[0041] In the picture: 1. Fan; 2. Compressor; 3. Ambient temperature sensor; 4. Outdoor coil temperature sensor; 5. Controller; 6. Electronic expansion valve; 80. Bus; 81. Processor; 82. Memory; 83. Communication interface. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is described and illustrated below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely used to explain this application and are not intended to limit this application. Based on the embodiments provided in this application, all other embodiments obtained by those of ordinary skill in the art without making any creative efforts are within the scope of protection of this application. Obviously, the drawings described below are merely examples or embodiments of the present application. Those skilled in the art can, without inventive effort, apply the present application to other similar scenarios based on these drawings. Furthermore, it is also understood that, although the effort involved in such a development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, changes in design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as an insufficiency of the content disclosed in this application.

[0043] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it refer to independent or alternative embodiments that are mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described in this application may be combined with other embodiments unless there is a conflict.

[0044] Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by persons of ordinary skill in the art to which this application belongs. The terms "a," "an," "an," "the," and similar expressions used herein do not denote quantitative limitations and may refer to either the singular or the plural. The terms "comprise," "include," "have," and any variations thereof, used herein, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or modules (units) is not limited to the listed steps or units but may also include steps or units not listed, or may include other steps or units inherent to the process, method, product, or apparatus. The terms "connected," "connected," "coupled," and similar expressions used herein are not limited to physical or mechanical connections but may include electrical connections, whether direct or indirect. As used herein, "plurality" means two or more. "And / or" describes an association between associated objects, indicating that three possible relationships exist. For example, "A and / or B" may mean: A exists alone; A and B exist simultaneously; or B exists alone. The character " / " generally indicates that the objects before and after are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific order for the objects.

[0045] Air conditioners are typically installed in well-ventilated, open spaces, such as building exterior walls, rooftops, or dedicated platforms. Under standard operating conditions, when the air conditioner is operating in cooling mode, the compressor compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gas and delivers it to the outdoor coil.

[0046] At this point, the outdoor fan drives air through the outdoor coil, allowing the high-temperature, high-pressure refrigerant gas to fully exchange heat with the outside air. The refrigerant condenses into a high-pressure liquid, which is then throttled and reduced in pressure by the electronic expansion valve before entering the indoor unit, completing the refrigeration cycle.

[0047] During this process, parameters such as the refrigerant gas temperature and condensing pressure delivered by the compressor are maintained within a reasonable range, the air conditioner pressure is stable, and the refrigeration capacity is fully utilized.

[0048] Among them, the safe operation of the compressor requires the maximum pressure of the system to be constrained. Different operating frequencies correspond to different allowable maximum pressures of the air conditioner system, and there is only one allowable maximum system pressure at a certain frequency.

[0049] like Figure 1 As shown in the figure, when the air conditioner is in cooling operation, the highest pressure of the air conditioner is the condensing pressure, and the condensing temperature corresponds to the condensing pressure one by one. The high pressure is determined by the outdoor coil temperature, thereby constraining the operating frequency of the compressor under different working conditions.

[0050] The maximum operating pressure of the air conditioner when the compressor is running is determined based on a certain operating time. If the cumulative operating time is shorter, the compressor allows the higher the maximum system pressure.

[0051] The annual operating time of an air conditioner at an outdoor temperature above 50°C is less than 2 hours. Therefore, at a specific ambient temperature, depending on the severity of the installation environment, appropriately increasing the operating pressure of the air conditioner can reduce the occurrence of protective shutdowns and improve cooling capacity.

[0052] However, when the outdoor ambient temperature is high or the heat exchange efficiency decreases, the temperature of the refrigerant gas delivered by the compressor will rise significantly. If this exceeds the compressor's allowable limit, the air conditioner may trigger a protection mechanism, causing frequency reduction or shutdown, affecting the air conditioner's continued operation and the user experience. When the air conditioner is installed in a poorly ventilated environment (such as inside a grille environment, in a narrow patio, or near a wall), air flow is severely restricted and the heat dissipation efficiency of the outdoor coil is significantly reduced.

[0053] At this time, the high-temperature and high-pressure refrigerant gas cannot be fully cooled, resulting in a rapid increase in the condensation pressure, an increase in the compressor load, and a sharp increase in the refrigerant gas temperature.

[0054] The outdoor air volume decreases, causing the air conditioner to not operate at its optimal state, resulting in poor cooling capacity and increased power consumption.

[0055] The current fan control mode is based on the air conditioner being in a well-ventilated environment. The fan speed is divided into low, medium and high speed gears, and the outdoor air volume is matched according to the operating frequency of the compressor and the outdoor ambient temperature. However, when the air conditioner is in a grille environment or other relatively closed environment, the fan's originally set operating speed can no longer meet the optimal air volume requirements. The outdoor speed needs to be intelligently adjusted to improve the problem of poor ventilation.

[0056] Among them, the grille environment means that the air conditioner is surrounded by a closed or semi-closed grille structure, which further hinders air circulation.

[0057] The obstruction of the grille not only reduces the amount of air entering, but also causes the temperature inside the grille to accumulate, forming a high-temperature microenvironment.

[0058] If the compressor is under high load for a long time, it may shorten the life of the equipment and increase the risk of user complaints.

[0059] The control of existing air conditioners in poorly ventilated environments mainly relies on a fixed outdoor coil temperature protection value, and does not consider the dynamic impact of the installation environment on the heat dissipation capacity.

[0060] Among them, the fixed outdoor coil temperature protection value may cause the air conditioner to shut down frequently under high temperature conditions. Although the compressor can temporarily operate at higher temperatures, existing technologies fail to take advantage of this feature, resulting in wasted cooling capacity.

[0061] Existing technologies also lack real-time judgment of ventilation conditions. The air conditioner may still operate according to standard logic even when there is severe heat dissipation failure, resulting in long-term overheating of the compressor and reduced reliability.

[0062] In addition, traditional solutions only make passive adjustments after the temperature exceeds the limit and cannot optimize parameters in advance by predicting poor ventilation.

[0063] To address the aforementioned issues, this application proposes an air conditioner that accurately determines whether the air conditioner is in a poorly ventilated environment by comparing changes in outdoor ambient temperature during fan and compressor operation. This also improves cooling capacity in high-temperature environments by adjusting the cooling protection limit, reducing user complaints.

[0064] Figure 2 Schematic diagram of the structure of the air conditioner according to the embodiment of the present application. Figure 2 As shown, the air conditioner includes an outdoor unit.

[0065] In some embodiments, the outdoor unit may be a side-discharge outdoor unit or a top-discharge outdoor unit.

[0066] In some embodiments, when the air conditioner is in cooling operation, the outdoor unit is used to release the heat carried by the refrigerant into the outside air to achieve a cooling function.

[0067] In some embodiments, the air conditioner further comprises an outdoor coil, which is used for exchanging heat with outside air.

[0068] Specifically, the outdoor coil is located at the rear and / or side of the outdoor unit, arranged in a U-shape or annular shape, and exchanges heat with the air through aluminum fins and copper tubes.

[0069] The outdoor coil adopts a U-shaped structure or annular structure with 3-4 rows of staggered arrangements, the fin spacing is 1.8 mm to 2.2 mm, and the outer diameter of the copper tube is 7 mm to 9.52 mm.

[0070] The fin surface of the outdoor coil is equipped with a corrugated disturbance structure to increase the degree of turbulence, and the heat exchange efficiency is improved by 15 to 20% compared with traditional designs.

[0071] The outdoor coil is installed on the air inlet side of the fan 1 to ensure that the air flow first passes through the outdoor coil and then passes through the fan 1, forming a complete air flow path.

[0072] It should be noted that the installation process of the outdoor coil is not limited to the above installation method.

[0073] In some embodiments, the air conditioner further comprises a fan 1. The fan 1 is used to drive air to flow through the outdoor coil.

[0074] Specifically, in the side-discharge outdoor unit, the fan 1 is installed at the front side of the side-discharge outdoor unit.

[0075] In the top-discharge outdoor unit, the fan 1 is installed on the top of the top-discharge outdoor unit.

[0076] The fan 1 is mechanically fixed to the outdoor coil to form a spatially matched relationship. The fan 1 forcibly drives air to flow through the outdoor coil, thereby enhancing the heat exchange efficiency.

[0077] The air volume of fan 1 is dynamically adjusted according to the outdoor coil temperature.

[0078] It should be noted that the installation process of the fan 1 is not limited to the above-mentioned installation method.

[0079] In some embodiments, the air conditioner further comprises a compressor 2. When the air conditioner is in cooling operation, the compressor 2 is used to compress the refrigerant gas and deliver the refrigerant gas to the outdoor coil for circulation.

[0080] Specifically, the compressor 2 is installed at the bottom of the outdoor unit and connected to the outdoor coil pipeline.

[0081] It should be noted that the installation process of the compressor 2 is not limited to the above-mentioned installation method.

[0082] In some embodiments, the air conditioner may include an ambient temperature sensor 3. The ambient temperature sensor 3 is used to detect the outdoor ambient temperature.

[0083] In some embodiments, the air conditioner may include an outdoor coil temperature sensor 4. The outdoor coil temperature sensor 4 is used to detect the outdoor coil temperature.

[0084] In some embodiments, the air conditioner may include a controller 5. The controller 5 is electrically connected to the compressor 2, the fan 1, the ambient temperature sensor 3, and the outdoor coil temperature sensor 4. The controller 5 can control the operation of the compressor 2 and the fan 1 based on the temperatures detected by the ambient temperature sensor 3 and the outdoor coil temperature sensor 4.

[0085] In some embodiments, as Figure 3 As shown, after the air conditioner starts cooling, the fan 1 is controlled to run.

[0086] When the fan 1 starts to run for the first time period, the outdoor ambient temperature T2 and the outdoor coil temperature are obtained.

[0087] After the first time period, the compressor 2 is controlled to operate, and the outdoor ambient temperature T1 during the second time period when the compressor 2 operates is obtained.

[0088] Determine whether the air conditioner is in a poorly ventilated installation environment based on the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2; If the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than a third threshold, it is determined that the air conditioner is in a poorly ventilated installation environment, and the protection value of the outdoor coil temperature is adjusted; Otherwise, it is determined that the air conditioner is not installed in a poorly ventilated environment and the protection value of the outdoor coil temperature is not adjusted.

[0089] By obtaining the outdoor ambient temperature T1 and the outdoor ambient temperature T2 before and after the operation of the compressor 3 and calculating the difference between the two, it is possible to accurately determine whether the air conditioner is in a poorly ventilated environment.

[0090] When the air conditioner is installed in a normal environment, the outdoor ambient temperature T1 is not much different from the outdoor ambient temperature T2.

[0091] If the air conditioner is installed in a poorly ventilated environment, the operation of the fan will cause the outdoor ambient temperature T1 to rise rapidly, resulting in the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 being greater than the third threshold.

[0092] Therefore, by obtaining the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 before and after the operation of the compressor 2, it is possible to accurately identify whether the air conditioner is in a poorly ventilated environment.

[0093] When the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than the third threshold, it indicates that there is obvious heat accumulation around the air conditioner.

[0094] At this time, dynamically adjusting the outdoor coil temperature protection value can avoid premature frequency reduction or shutdown caused by traditional fixed protection thresholds, allowing the system to continue operating at higher temperatures, extending the effective cooling time, and reducing the number of times protection shutdowns are triggered.

[0095] Specifically, the first time period of the fan 1 starting operation can be 5 seconds or other time periods. By adjusting the fan 1 starting time, the air inside and outside the grille environment can be replaced, the initial temperature error can be eliminated, and a low pressure condition can be created for the compressor 2 to start.

[0096] By optimizing the startup sequence of fan 1 and compressor 2 and combining it with dynamic protection value adjustment, the performance of the air conditioner is improved and the reliability is guaranteed under poor ventilation conditions.

[0097] Among them, fan 1 runs 5 seconds in advance to complete the airflow replacement, so that the air exchange rate inside and outside the grille environment reaches more than 90%, reducing the ambient temperature detection error and providing an accurate benchmark for subsequent control decisions.

[0098] In some embodiments, the outdoor ambient temperature T1 is the average temperature of the compressor 2 during the second operation time.

[0099] By setting the average temperature of the second time period as the outdoor ambient temperature T1, the influence of instantaneous temperature fluctuations on the judgment can be eliminated, the data stability can be improved, and the number of false operations can be reduced.

[0100] Specifically, the second time period may range from 480 seconds to 720 seconds. For example, the second time period is set to 600 seconds.

[0101] Measuring the outdoor ambient temperature before and after the compressor runs allows the air conditioner to identify anomalies in advance, creating a critical window for adjusting protection values. This adaptability to the needs of different climate regions enhances the solution's universality.

[0102] It should be noted that the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is the absolute value of the difference.

[0103] Specifically, the value range of the third threshold may be 4 degrees Celsius to 6 degrees Celsius. For example, the third threshold is set to 5 degrees Celsius.

[0104] In a well-ventilated environment, the outdoor temperature usually fluctuates slightly in a short period of time, generally not exceeding 3 degrees Celsius.

[0105] When the third threshold value is 4 degrees Celsius to 6 degrees Celsius, it can effectively filter out the interference of natural fluctuations in ambient temperature and avoid misjudgment caused by accidental factors.

[0106] If the third threshold is set to 2 degrees Celsius, a slight change in ambient temperature could trigger a false positive. If the third threshold is set to 8 degrees Celsius, even mild ventilation obstructions might be missed, causing the system to run under high load for extended periods without timely adjustments.

[0107] By comparing the ambient temperature rise before and after the start-up of compressor 2, the degree of heat dissipation obstruction can be directly reflected, which is more sensitive than static temperature detection.

[0108] In some embodiments, after the outdoor coil temperature protection value is adjusted, the air conditioner is operated for a period of time, and the air conditioner is continuously determined to determine whether it is in a poorly ventilated installation environment according to the above conditions. If it is determined that the air conditioner is not in a poorly ventilated installation environment, the outdoor coil temperature protection value is adjusted to the value before the adjustment.

[0109] In some embodiments, as Figure 4 As shown, whether the air conditioner is in a high temperature environment is determined based on whether the outdoor environment temperature T1 is greater than a first threshold; If the outdoor ambient temperature T1 is greater than the first threshold, it is determined that the air conditioner is in a high temperature environment, and further determined whether the air conditioner is in a grille environment; Otherwise, it is determined that the air conditioner is not in a high temperature environment and the protection value of the outdoor coil temperature is not adjusted.

[0110] By determining whether the outdoor ambient temperature T1 during the second period of operation of the compressor 2 is higher than the first threshold, it can be determined whether the air conditioner is in a high temperature environment.

[0111] When the outdoor ambient temperature T1 is greater than the first threshold, the heat dissipation load of the air conditioner increases significantly, and the influence of shielding objects such as grilles on heat dissipation is aggravated.

[0112] The judgment logic of the grille environment is triggered only in high-temperature environments, reducing redundant detection in low-temperature scenarios, improving system judgment efficiency, and avoiding unnecessary protection actions caused by misjudgment.

[0113] It should be noted that when it is determined that the air conditioner is not in a high temperature environment, the air conditioner operates in a normal operating mode.

[0114] The air conditioner operates in a normal operating mode so that the air conditioner can fully realize heat exchange, and each component in the air conditioner is in an efficient and stable working state.

[0115] In the normal operation mode, the compressor 2 operates at a preset power and the refrigeration efficiency reaches the nominal value.

[0116] Fan 1 runs at full speed to ensure smooth air circulation and quickly reach the set temperature.

[0117] The air conditioner does not need to activate protection functions such as overheating and overload. The operating noise and vibration are within the normal range, and the life of the components is not affected by abnormal operating conditions.

[0118] By judging whether the outdoor ambient temperature T1 is greater than a first threshold, it is determined whether the outdoor ambient temperature T1 belongs to a temperature range in which the air conditioner operates for a relatively short time.

[0119] If the outdoor ambient temperature T1 satisfies the condition of being greater than the first threshold, the air conditioner will only operate for a short time in a high-temperature outdoor environment, and the protective value of the refrigerant gas temperature delivered by compressor 2 can be appropriately increased. This can prevent the air conditioner from operating under high-pressure conditions for a long time and ensure the reliability of compressor 2.

[0120] Specifically, the value range of the first threshold may be 45 degrees Celsius to 50 degrees Celsius. For example, the first threshold is set to 48 degrees Celsius, which can effectively distinguish short-term high temperatures and ensure that the compressor 2 operates within the allowable short-term overload range.

[0121] High-temperature operating conditions are screened by the outdoor ambient temperature T1, unnecessary adjustments in low-temperature environments are eliminated, the system computing burden is reduced, and the temperature difference is further analyzed only under high-temperature conditions. This avoids false triggering caused by the small temperature difference between the inside and outside of the grille environment in low-temperature seasons, improves the accuracy of identifying poorly ventilated environments, and reduces the energy consumption of ineffective speed regulation of fan 1.

[0122] In some embodiments, as Figure 5 As shown, after determining that the air conditioner is in a high temperature environment, it is determined whether the air conditioner is in a grille environment based on whether the difference between the outdoor coil temperature and the outdoor environment temperature T2 is less than a second threshold; If the difference between the outdoor coil temperature and the outdoor ambient temperature T2 is less than a second threshold, it is determined that the air conditioner is in a grille environment, and further determined whether the air conditioner is in a poorly ventilated installation environment; Otherwise, it is determined that the air conditioner is not in a grille environment and the protection value of the outdoor coil temperature is not adjusted.

[0123] By comparing whether the difference between the outdoor coil temperature and the outdoor ambient temperature T2 is less than the second threshold, it can be accurately determined whether the air conditioner is in a grille environment.

[0124] When the air conditioner is in a grille environment, the heat exchange efficiency between the outdoor coil and the ambient air decreases, causing the difference between the outdoor coil temperature and the outdoor ambient temperature T2 to be significantly lower than normal.

[0125] The temperature difference feature is used to identify the physically blocked grille environment and improve the recognition accuracy.

[0126] It should be noted that after determining that the air conditioner is not in a grille environment, the air conditioner can operate according to the operation mode after the air conditioner is started for cooling.

[0127] The operation mode of the air conditioner after cooling is started may be a normal operation mode, or an operation mode in which the air conditioner is installed in a poorly ventilated environment.

[0128] Among them, the operating mode of the air conditioner in a poorly ventilated installation environment is that the air conditioner enters a restricted operating mode or triggers a protection mechanism to avoid malfunctions due to overheating, abnormal pressure, etc.

[0129] In the operating mode of a poorly ventilated installation environment, the outdoor coil cannot dissipate heat effectively, causing the exhaust pressure of compressor 2 to increase. After the air conditioner detects the high-pressure protection signal, it will automatically reduce the frequency of compressor 2 or even shut down briefly.

[0130] At this time, the air conditioner will experience a significant decrease in cooling effect, sudden changes in noise, and frequent starts and stops.

[0131] Specifically, the second threshold value may be in the range of 0 degrees Celsius to 2 degrees Celsius. For example, the second threshold value is set to 1 degree Celsius.

[0132] By setting the second threshold to determine whether the air conditioner is in a grille environment, the physical characteristics of the grille environment can be identified and judged.

[0133] By judging the conditions, it is ensured that subsequent adjustments are triggered only when the air conditioner is in a grille environment, avoiding excessive adjustments due to partial occlusion and reducing the grille misrecognition rate.

[0134] At the same time, it protects compressor 2 while still operating according to standard logic in a non-uniform heat dissipation environment, thereby extending the life of key components.

[0135] In some embodiments, as Figure 6 As shown, according to the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs, the protection value of the outdoor coil temperature is increased by a corresponding compensation value, wherein different preset temperature difference ranges correspond to different compensation values.

[0136] The protection value compensation amount is dynamically adjusted according to the quantitative classification of the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs, so as to achieve refined matching of the protection strategy and achieve the optimal balance between safe operation and energy efficiency.

[0137] A smaller compensation value can cope with minor heat dissipation obstructions and avoid frequent shutdowns. A larger compensation value can ensure that the air conditioner can continue to operate in extreme scenarios.

[0138] In some embodiments, the compensation value increases as the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs increases.

[0139] By setting a nonlinear relationship in which the compensation value increases with the temperature difference, a proportional response between the protection strength and the risk level is achieved, ensuring that the system can obtain optimal protection under different ventilation conditions.

[0140] When the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 falls within a small preset temperature difference range, the system only needs to slightly increase the protection value to maintain stability; When the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 falls within a large preset temperature difference range, it indicates that the heat dissipation of the air conditioner is severely obstructed and the protection value needs to be significantly increased to avoid high voltage risks.

[0141] Specifically, the compensation value of the protection value of the outdoor coil temperature increases in a range of 0.5 degrees Celsius to 1.5 degrees Celsius.

[0142] Specifically, the degree of influence of the grille environment on the air conditioner is determined according to the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2.

[0143] When the grille environment has a relatively small impact on the air conditioner and lasts for a preset period of time, the protection value of the outdoor coil temperature is correspondingly increased by the first compensation value.

[0144] For example, when the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than or equal to 4 degrees Celsius and less than 5 degrees Celsius, and lasts for 30 seconds, the protection value of the outdoor coil temperature is correspondingly increased by 0.5 degrees Celsius.

[0145] When the grille environment has a moderate impact on the air conditioner and lasts for a preset period of time, the protection value of the outdoor coil temperature is correspondingly increased by a second compensation value.

[0146] For example, when the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than or equal to 5 degrees Celsius and less than 6 degrees Celsius, and lasts for 30 seconds, the protection value of the outdoor coil temperature is correspondingly increased by 1 degree Celsius.

[0147] When the grille environment has a greater impact on the air conditioner and lasts for a preset period of time, the protection value of the outdoor coil temperature is correspondingly increased by a third compensation value.

[0148] For example, when the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than or equal to 6 degrees Celsius and lasts for 30 seconds, the protection value of the outdoor coil temperature is correspondingly increased by 1.5 degrees Celsius.

[0149] The increased compensation value for the protection value of the outdoor coil temperature can achieve an optimal balance between safety and performance, ensuring both reliable system operation and effectively improving cooling capacity under poor ventilation conditions.

[0150] Through the precisely set compensation value gradient, the air conditioner can implement differentiated protection for different degrees of heat dissipation deterioration.

[0151] Based on the short-term tolerance characteristics of Compressor 2, all compensation value increases are ensured to be within the equipment's safety tolerance range. The graded adjustment mechanism enables the air conditioner to automatically adapt to actual operating conditions, avoiding overcompensation or underprotection.

[0152] The dynamic adjustment function monitors temperature change trends in real time and intelligently adjusts the compensation intensity to ensure rapid response and maintain the stability of the air conditioner.

[0153] In some embodiments, as Figure 7 As shown, when it is determined that the air conditioner is installed in a poorly ventilated environment, the operating frequency of the compressor is increased according to the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs.

[0154] In an installation environment with poor ventilation, the operating frequency of the compressor 2 is increased to increase the refrigerant circulation volume, thereby compensating for the decrease in heat exchange efficiency caused by poor ventilation.

[0155] Specifically, when the air conditioner is in cooling operation, the highest operating pressure is the condensing pressure, and the condensing pressure corresponds to the condensing temperature.

[0156] The outdoor coil temperature is used to determine the high-pressure pressure, thereby constraining the operating frequency of Compressor 2 under different operating conditions. The maximum operating pressure of the air conditioner when Compressor 2 is running is determined based on a certain operating time. The shorter the cumulative operating time, the higher the maximum pressure allowed by Compressor 2.

[0157] According to the preset temperature difference range of the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2, the protection value of the outdoor coil temperature can be correspondingly increased, and the upper limit of the allowable condensing pressure can be correspondingly increased.

[0158] Within the allowable upper limit of the condensing pressure, the controller 5 can increase the operating frequency of the compressor 2 .

[0159] In some embodiments, the operating frequency of the compressor 2 increases as the compensation value of the protection value of the outdoor coil temperature increases.

[0160] A positive proportional relationship between the operating frequency of compressor 2 and the compensation amount of the protection value is established to achieve dynamic load matching, ensuring that the air conditioner can not only improve the cooling capacity but also prevent the system from over-temperature operation in extreme environments.

[0161] In some embodiments, after adjusting the protection value of the outdoor coil temperature, the rate of change of the refrigerant gas temperature delivered by the compressor 2 is obtained. If the rate of change of the refrigerant gas temperature delivered by the compressor 2 exceeds a preset safety threshold, the operating frequency of the compressor 2 is reduced.

[0162] By monitoring the refrigerant temperature change rate in real time, a fast-response safety feedback mechanism is established during the dynamic adjustment process to prevent potential overheating risks caused by increased protection values.

[0163] When the protection value is increased, if the operating frequency of compressor 2 increases rapidly, the refrigerant temperature may rise sharply. Even if the current temperature does not reach the new protection value, there is still a risk of overtemperature.

[0164] When the rate of change of the temperature of the refrigerant gas delivered by compressor 2 exceeds the preset safety threshold, the operating frequency of compressor 2 is immediately reduced while maintaining the high-speed operation of the fan, which can reduce the refrigerant temperature peak and improve system stability.

[0165] In some embodiments, as Figure 8 As shown, when it is determined that the air conditioner is installed in a poorly ventilated environment, the rotation speed of the fan 1 is increased according to the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs.

[0166] In a poorly ventilated environment, the forced convection heat dissipation effect is enhanced through the hierarchical linkage of the fan speed and the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 within the preset temperature difference range, forming a synergistic effect with the protection value adjustment, further improving the system's risk resistance.

[0167] By increasing the speed of fan 1, the air flow rate on the surface of the outdoor coil can be increased, thereby improving the heat transfer coefficient.

[0168] Specifically, the degree of influence of the grille environment on the air conditioner is determined according to the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2.

[0169] When the grille environment has a smaller impact on the air conditioner, the rotation speed of the fan 1 is correspondingly increased by the first compensation value.

[0170] For example, when the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than or equal to 4 degrees Celsius and less than 5 degrees Celsius, the rotation speed of the fan 1 is correspondingly increased by a compensation value of 50 to 100 revolutions.

[0171] When the grille environment has a moderate impact on the air conditioner, the rotation speed of the fan 1 is increased by the second compensation value accordingly.

[0172] For example, when the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than or equal to 5 degrees Celsius and less than 6 degrees Celsius, the rotation speed of the fan 1 is correspondingly increased by a compensation value of 150 to 200 rpm.

[0173] When the grille environment has a greater impact on the air conditioner, the rotation speed of the fan 1 is correspondingly increased by the third compensation value.

[0174] For example, when the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than or equal to 6 degrees Celsius, the rotation speed of the fan 1 is correspondingly increased by a compensation value of 300 revolutions.

[0175] The embodiment of the present application also provides a method for controlling an air conditioner. Figure 9 This is a flow chart of the air conditioner control method provided in an embodiment of the present application.

[0176] like Figure 9 As shown, the air conditioner control method includes: The air conditioner starts cooling, starts running fan 1, and detects the outdoor ambient temperature T2 through the ambient temperature sensor 3; Detecting the outdoor coil temperature through the outdoor coil temperature sensor 4; After the first time period, the compressor 2 is started and the outdoor ambient temperature T1 during the second time period of the compressor 2 is detected by the ambient temperature sensor 3; Determine whether the air conditioner is in a poorly ventilated installation environment based on the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2; If the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than a third threshold, it is determined that the air conditioner is in a poorly ventilated installation environment, and the protection value of the outdoor coil temperature is adjusted; Otherwise, it is determined that the air conditioner is not installed in a poorly ventilated environment and the protection value of the outdoor coil temperature is not adjusted.

[0177] Through the coordinated detection of the ambient temperature sensor 3 and the outdoor coil temperature sensor 4, intelligent recognition of the air conditioner installation environment is achieved.

[0178] By first starting fan 1 to obtain initial environmental parameters and then starting compressor 2 to detect operating parameters, a time-series environmental status detection process is established.

[0179] The temperature difference judgment logic is simple and reliable, and can accurately identify the characteristics of poor ventilation, while the dynamic protection value adjustment ensures that the identification results can be converted into effective control actions.

[0180] It realizes a complete closed loop from environmental detection to parameter adjustment, and can automatically adapt to different installation environments without human intervention, significantly improving the technical requirements of the air conditioner's adaptive ability under complex working conditions.

[0181] In addition, combined Figure 2 The air conditioner according to the embodiment of the present application is described. Figure 10 4 is a hardware configuration diagram of the controller 5 according to an embodiment of the present application.

[0182] The controller 5 of the air conditioner may include a processor 81 and a memory 82 storing computer program instructions.

[0183] Specifically, the processor 81 may include a central processing unit (CPU), or an application-specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0184] The memory 82 may include a large-capacity memory for data or instructions.

[0185] In some embodiments, the controller 5 of the air conditioner may further include a communication interface 83 and a bus 80. Figure 10 As shown, the processor 81, the memory 82, and the communication interface 83 are connected via a bus 80 and communicate with each other.

[0186] The communication interface 83 is used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0187] The bus 80 includes hardware, software, or both, coupling the components of the air conditioner to each other.

[0188] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0189] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An air conditioner, characterized in that: include: Outdoor coil, which is used to exchange heat with the outside air; a fan for driving air to flow through the outdoor coil; A compressor, configured to compress refrigerant gas and deliver the refrigerant gas to the outdoor coil for circulation; Ambient temperature sensor, used to detect outdoor ambient temperature; Outdoor coil temperature sensor, used to detect outdoor coil temperature; A controller electrically connected to the compressor, the fan, the ambient temperature sensor, and the outdoor coil temperature sensor; the controller is configured to: After the air conditioner starts cooling, the fan is controlled to operate and the outdoor ambient temperature T2 and the outdoor coil temperature are obtained; After the first time period, the compressor is controlled to operate, and the outdoor ambient temperature T1 during the second time period of the compressor operation is obtained; Determining whether the air conditioner is in a poorly ventilated installation environment based on a difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2; If the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than a third threshold, it is determined that the air conditioner is installed in a poorly ventilated environment, and the protection value of the outdoor coil temperature is adjusted; Otherwise, it is determined that the air conditioner is not installed in a poorly ventilated environment, and the protection value of the outdoor coil temperature is not adjusted.

2. The air conditioner according to claim 1, characterized in that The controller is further configured to: determining whether the air conditioner is in a high temperature environment according to whether the outdoor environment temperature T1 is greater than a first threshold; If the outdoor environment temperature T1 is greater than the first threshold, it is determined that the air conditioner is in a high temperature environment, and further determined whether the air conditioner is in a grille environment; Otherwise, it is determined that the air conditioner is not in a high temperature environment, and the protection value of the outdoor coil temperature is not adjusted.

3. The air conditioner according to claim 2, characterized in that The controller is further configured to: After determining that the air conditioner is in a high temperature environment, determining whether the air conditioner is in a grille environment based on whether the difference between the outdoor coil temperature and the outdoor environment temperature T2 is less than a second threshold; If the difference between the outdoor coil temperature and the outdoor ambient temperature T2 is less than a second threshold, it is determined that the air conditioner is in a grille environment, and further determined whether the air conditioner is in a poorly ventilated installation environment; Otherwise, it is determined that the air conditioner is not in a grille environment, and the protection value of the outdoor coil temperature is not adjusted.

4. The air conditioner according to claim 1, wherein: The controller is further configured to: When it is determined that the air conditioner is installed in a poorly ventilated environment, the protection value of the outdoor coil temperature is increased by a corresponding compensation value according to the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs, wherein different preset temperature difference ranges correspond to different compensation values.

5. The air conditioner according to claim 4, characterized in that The controller is further configured to: The compensation value increases as the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs increases.

6. The air conditioner according to claim 5, characterized in that The controller is further configured to: When it is determined that the air conditioner is installed in a poorly ventilated environment, the operating frequency of the compressor is increased according to the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs.

7. The air conditioner according to claim 6, characterized in that The controller is further configured to: The operating frequency of the compressor increases as the compensation value of the protection value of the outdoor coil temperature increases.

8. The air conditioner according to claim 6, characterized in that The controller is further configured to: After adjusting the protection value of the outdoor coil temperature, the change rate of the refrigerant gas temperature delivered by the compressor is obtained. If the change rate of the refrigerant gas temperature delivered by the compressor exceeds a preset safety threshold, the operating frequency of the compressor is reduced.

9. The air conditioner according to claim 1, wherein: The controller is further configured to: When it is determined that the air conditioner is installed in a poorly ventilated environment, the rotation speed of the fan is increased according to the preset temperature difference range to which the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 belongs.

10. An air conditioner control method, characterized in that: include: The air conditioner starts cooling, starts running the fan, and detects the outdoor ambient temperature T2 through the ambient temperature sensor; Detect the outdoor coil temperature through the outdoor coil temperature sensor; After the first time period, the compressor is started and the outdoor ambient temperature T1 during the second time period of the compressor operation is detected by the ambient temperature sensor; determining whether the air conditioner is in a poorly ventilated installation environment according to a difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2; If the difference between the outdoor ambient temperature T1 and the outdoor ambient temperature T2 is greater than a third threshold, it is determined that the air conditioner is installed in a poorly ventilated environment, and the protection value of the outdoor coil temperature is adjusted; Otherwise, it is determined that the air conditioner is not installed in a poorly ventilated environment, and the protection value of the outdoor coil temperature is not adjusted.

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