Anti-cold air control method of air conditioner, machine readable storage medium and air conditioner

Abstract

The application provides a cold air prevention control method of an air conditioner, a machine readable storage medium and the air conditioner. The cold air prevention control method of the air conditioner comprises the following steps: receiving a start-up automatic operation instruction, obtaining a set temperature of a user and an indoor environment temperature; if the set temperature is less than or equal to the indoor environment temperature, taking the set temperature as a target temperature of an indoor coil; monitoring a real-time temperature of the indoor coil; calculating a target frequency of a compressor according to a deviation between the real-time temperature and the target temperature; starting the compressor and controlling the compressor to operate at the target frequency. The application has the advantages that the temperature of the air outlet is prevented from being too low in the refrigeration mode, the temperature fluctuation is reduced, and the user comfort is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning, and in particular to a method for controlling cold air in an air conditioner, a machine-readable storage medium, and an air conditioner. Background Technology

[0002] In modern life, air conditioning systems are crucial for regulating indoor comfort, and their operational efficiency and effectiveness directly impact the user experience. Traditional air conditioning systems primarily rely on the temperature difference between the set temperature and the current indoor temperature to determine whether to activate cooling or heating mode. While this temperature difference-based control strategy is simple and direct, it has some shortcomings in practical applications.

[0003] Specifically, when an air conditioning system enters cooling mode, the compressor typically operates at a higher frequency to quickly lower the indoor temperature to the set value. The high-frequency operation of the compressor allows for rapid output of a large amount of cooling capacity, resulting in a significant drop in the air outlet temperature. While this helps with rapid cooling, it also leads to larger fluctuations in indoor temperature. Excessively low outlet temperatures can not only cause discomfort for users but also result in energy waste, as the overcooled indoor air requires additional energy to reheat to a comfortable range.

[0004] To improve this situation, existing technologies have introduced PID (Proportional-Integral-Derivative) control algorithms to regulate room temperature. This involves calculating the deviation between the indoor temperature and the set temperature, and adjusting the compressor's operating state accordingly to achieve precise room temperature control. However, although PID control improves the stability and accuracy of temperature control to some extent, in cooling mode, especially when the compressor is running at high frequency, it is still difficult to avoid problems such as excessively low outlet temperatures and temperature fluctuations. Summary of the Invention

[0005] One objective of this invention is to avoid excessively low outlet air temperature in cooling mode, reduce temperature fluctuations, and improve user comfort.

[0006] A further objective of this invention is to rationally adjust the operating frequency of the compressor to avoid over-adjustment or ineffective operation of the compressor due to frequent temperature setting changes.

[0007] Specifically, according to a first aspect of the present invention, the present invention provides a method for controlling cold air in an air conditioner, comprising:

[0008] Upon receiving the power-on automatic operation command, the system obtains the user's set temperature and the indoor ambient temperature.

[0009] If the set temperature is less than or equal to the indoor ambient temperature, the set temperature shall be used as the target temperature for the indoor coil.

[0010] Monitor the real-time temperature of the indoor coil;

[0011] The target frequency of the compressor is calculated based on the deviation between the real-time temperature and the target temperature;

[0012] Start the compressor and control it to operate at the target frequency.

[0013] Optionally, after the step of controlling the compressor to operate at the target frequency, the method further includes:

[0014] Monitor changes in the set temperature;

[0015] If the set temperature changes twice or more within a first preset time period, and the cumulative change exceeds a preset threshold, then the weight is determined based on the time interval of the set temperature change.

[0016] A weighted average is performed on each set temperature before and after the change. If the result is still less than or equal to the indoor ambient temperature, the result is replaced with the target temperature of the indoor coil.

[0017] Optionally, the first preset duration is any value between 2 minutes and 10 minutes;

[0018] The preset threshold is any value between 1℃ and 5℃.

[0019] Optionally, after the step of controlling the compressor to operate at the target frequency, the method further includes:

[0020] Monitor the changes in the indoor ambient temperature;

[0021] If the indoor ambient temperature drops below the sum of the set temperature and the first preset buffer value within a second preset time period, the compressor will be turned off.

[0022] Optionally, the second preset duration is any value between 5 min and 15 min;

[0023] The first preset buffer value is any value between 0.5℃ and 2℃.

[0024] Optionally, after the step of shutting down the compressor, the following steps are also included:

[0025] If the indoor ambient temperature rises to a level exceeding the sum of the set temperature and the second preset buffer value, the compressor will be restarted.

[0026] The second preset buffer value is greater than the first preset buffer value.

[0027] Optionally, after the step of controlling the compressor to operate at the target frequency, the method further includes:

[0028] The uniformity of the indoor ambient temperature is detected every third preset time interval;

[0029] If the unevenness of the indoor ambient temperature is detected to exceed a preset range, the frequency distribution of the compressor in different areas is adjusted to ensure the uniformity of the indoor ambient temperature.

[0030] Optionally, the third preset duration is any value between 5 min and 15 min;

[0031] The preset range is -3℃ to 3℃.

[0032] According to a second aspect of the present invention, a machine-readable storage medium is provided having a machine-executable program stored thereon, which, when executed by a processor, implements the anti-cold air control method described above.

[0033] According to a third aspect of the present invention, an air conditioner is provided, comprising:

[0034] The indoor unit is equipped with an indoor ambient temperature sensor and an indoor coil temperature sensor.

[0035] The outdoor unit, which is communicatively connected to the indoor unit, is equipped with an outdoor ambient temperature sensor; and

[0036] A controller includes a memory, a processor, and a machine-executable program stored in the memory and running on the processor, wherein when the processor executes the machine-executable program, it implements the anti-cold air control method described in any one of the above.

[0037] The anti-cold air control method for air conditioners of this invention, upon receiving an automatic start-up command, first acquires the user's set temperature and the indoor ambient temperature. If the set temperature is less than or equal to the indoor ambient temperature, the set temperature is used as the target temperature for the indoor coil. Then, the real-time temperature of the indoor coil is monitored, and the target frequency of the compressor is calculated based on the deviation between the real-time temperature and the target temperature. Finally, the compressor is started and controlled to operate at the target frequency. Since the indoor coil is a crucial component in the refrigeration cycle, its surface temperature directly affects the cooling effect and the outlet temperature. Therefore, by using the set temperature as the target temperature for the indoor coil and calculating the target frequency of the compressor accordingly, precise management of the refrigeration process can be achieved. In the initial stage of cooling, it effectively avoids excessively low coil temperatures caused by excessively high compressor frequencies, thereby significantly reducing the generation of cold air. After turning on the air conditioner, the user will not feel a biting cold air attack, but will gradually experience comfortable and suitable cool air evenly distributed throughout the indoor space, greatly improving the user's experience in the initial stage of air conditioner operation, while also avoiding physical discomfort that may be caused by direct cold air blowing.

[0038] Furthermore, the anti-cold air control method for the air conditioner of the present invention, after controlling the compressor to operate at the target frequency, sets up a monitoring mechanism for changes in the set temperature. When the set temperature changes twice or more within a first preset time period, and the cumulative change exceeds a preset threshold, the weight is accurately determined based on the time interval of the set temperature change, and then a weighted average is applied to each set temperature before and after the change. If the processing result is still less than or equal to the indoor ambient temperature, the processing result is replaced with the target temperature of the indoor coil. In this way, the operating frequency of the compressor can be reasonably adjusted. When facing frequent changes in the set temperature by the user, it can effectively avoid the compressor falling into an excessively frequent adjustment state due to disorderly fluctuations in the set temperature, or an ineffective operating state caused by the inability to respond in time. This ensures that the compressor always maintains a high-efficiency and stable operating range, extends the service life of the compressor, reduces the risk of failure caused by excessive operation, and also significantly improves the overall operating energy efficiency of the air conditioner, reduces unnecessary energy consumption, and enables the air conditioner to accurately maintain the comfort and stability of the indoor environment when dealing with complex and changing user needs, bringing users a better and more reliable user experience.

[0039] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0040] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0041] Figure 1 This is a schematic flowchart of a control method for an air conditioner according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic structural diagram of a machine-readable storage medium according to an embodiment of the present invention;

[0043] Figure 3 This is a schematic structural diagram of an air conditioner according to an embodiment of the present invention.

[0044] Figure label:

[0045] 10. Air conditioner; 110. Indoor unit; 111. Indoor ambient temperature sensor; 112. Indoor coil temperature sensor; 120. Outdoor unit; 121. Outdoor ambient temperature sensor; 122. Compressor; 130. Controller; 131. Memory; 132. Processor; 200. Machine-readable storage medium; 201. Machine-executable program. Detailed Implementation

[0046] Reference will now be made in detail to embodiments of the invention, one or more of which are illustrated in the accompanying drawings. The various embodiments provided are intended to explain the invention and not to limit it. In fact, various modifications and variations to the invention will be apparent to those skilled in the art without departing from the scope or spirit of the invention. For example, a feature illustrated or described as part of one embodiment may be used with another embodiment to produce yet another embodiment. Therefore, the invention is intended to cover such modifications and variations within the scope of the appended claims and their equivalents.

[0047] In the description of this embodiment, it should be understood that the term "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified. When a feature "includes or contains" one or more of the features it covers, unless otherwise specifically described, this indicates that other features are not excluded and may be further included.

[0048] In the description of this embodiment, the terms "one embodiment," "some embodiments," "some examples," "one example," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The present invention provides a method for controlling cold air in an air conditioner 10. The air conditioner 10 can be a split-type air conditioner 10, which includes an indoor unit 110 and an outdoor unit 120. The indoor unit 110 and the outdoor unit 120 work together to provide a comfortable indoor environment for the user.

[0050] Figure 1 This is a schematic flowchart of an air conditioner 10's anti-cold air control method according to an embodiment of the present invention, as shown below. Figure 1 As shown, the cold air control method includes at least the following steps S102 to S110.

[0051] Step S102: Receive the power-on automatic operation command and obtain the user's set temperature and indoor ambient temperature.

[0052] The automatic start command can come from various trigger sources. For example, a signal sent by the user pressing the "Power On + Auto Mode" button combination on the remote control. Many air conditioner remote controls have dedicated power on and mode selection buttons. When the user operates these two buttons simultaneously (or the remote control's internal program is set to automatically enter the default automatic operation mode after pressing the power on button), the air conditioner 10 will receive the automatic start command.

[0053] It's also possible that the air conditioner 10 can be controlled to turn on and run automatically via a mobile app. Currently, many smart air conditioners 10 can connect to mobile applications, allowing users to turn on the air conditioner 10 and select the automatic operation function on their mobile phones. In this case, the air conditioner 10 will also receive the corresponding automatic start-up command.

[0054] In addition, some air conditioners 10 with smart scene linkage functions will also receive such instructions when specific scene conditions are met. For example, when the smart home system detects that the indoor ambient temperature is too high, and the user has preset a scene to automatically turn on the air conditioner when the temperature is too high, the air conditioner 10 will receive the automatic start-up instruction to turn on and run automatically.

[0055] The air conditioner 10 can obtain the current indoor ambient temperature through the built-in indoor ambient temperature sensor 111 and read the target temperature set by the user through the control panel or remote device. Obtaining accurate set temperature and indoor ambient temperature is a prerequisite for achieving precise temperature control and helps to make intelligent adjustments based on temperature differences.

[0056] Step S104: If the set temperature is less than or equal to the indoor ambient temperature, the set temperature shall be used as the target temperature of the indoor coil.

[0057] When the set temperature is less than or equal to the indoor ambient temperature, it means that the cooling mode needs to be activated to lower the indoor ambient temperature to reach the set temperature. The indoor coil is a key component where the refrigerant evaporates and absorbs heat on the indoor side. In the cooling cycle, the refrigerant evaporates in the indoor coil, absorbing heat from the surrounding air, thus lowering the indoor air temperature. Setting the set temperature as the target temperature for the indoor coil is to establish an ideal "operating point" for the coil temperature. For example, if the set temperature is 20℃, when the indoor ambient temperature is high, such as 25℃, the indoor coil temperature is gradually lowered to 20℃ through control measures. This ensures that the coil has a sufficiently low temperature to continuously absorb heat from the indoor air, and as heat is absorbed, the indoor air temperature gradually approaches the coil temperature, eventually reaching the set temperature of 20℃.

[0058] Step S106: Monitor the real-time temperature of the indoor coil.

[0059] The real-time temperature of the indoor coil directly reflects the progress of the cooling process. Monitoring the real-time temperature of the indoor coil provides feedback data for PID calculation, allowing for accurate determination of the deviation between the current temperature and the target temperature. For example, when the real-time temperature of the indoor coil is higher than the set target temperature, it indicates that the coil requires stronger cooling capacity. The PID algorithm needs to calculate a suitable target frequency for compressor 122 to accelerate refrigerant circulation, thereby lowering the coil temperature. Conversely, if the coil temperature is too low, it may be necessary to reduce the operating frequency of compressor 122 to avoid over-cooling.

[0060] Step S108: Calculate the target frequency of compressor 122 based on the deviation between the real-time temperature and the target temperature.

[0061] The operating frequency of the air conditioner compressor 122 directly affects the refrigerant circulation speed and cooling capacity. When calculating the target frequency of compressor 122, the deviation between the real-time indoor coil temperature and the target temperature is used as a basis, which is a principle based on feedback control. The goal is to adjust the compressor 122 frequency so that the indoor coil temperature can reach the target temperature as quickly and stably as possible.

[0062] In cooling mode, the air conditioner 10 will accurately compare the target temperature and real-time temperature of the indoor coil to obtain the temperature difference between the two. Then, combined with the PID control algorithm or other intelligent control strategies, the air conditioner 10 will use the temperature difference as a key input parameter to calculate the most suitable target frequency for the compressor 122 under the current operating conditions.

[0063] By calculating the target frequency of compressor 122 based on deviation, precise regulation of the cooling process can be achieved. When the indoor heat load changes, such as when more people are in the room or when new heat-generating equipment is turned on, the indoor ambient temperature will rise, causing the deviation between the real-time temperature of the indoor coil and the target temperature to increase.

[0064] At this point, the target frequency of compressor 122, calculated based on the new deviation, will increase accordingly, thereby increasing the cooling capacity to cope with the increase in heat load. Conversely, when the heat load decreases, the deviation decreases, and the target frequency of compressor 122 will also decrease, avoiding over-cooling and achieving energy-saving and comfortable indoor temperature control.

[0065] Step S110: Start compressor 122 and control compressor 122 to run at the target frequency.

[0066] The operating frequency of compressor 122 directly determines the refrigerant circulation speed and the cooling capacity. The target frequency is calculated based on the deviation between the real-time indoor coil temperature and the target temperature from the previous steps. It is designed to ensure that the indoor coil temperature reaches the desired target temperature, thereby achieving effective regulation of the indoor ambient temperature.

[0067] By controlling the compressor 122's operation according to a target frequency, dynamic adjustment of the cooling process can be achieved. Assuming the initial indoor temperature is high, and the real-time temperature of the indoor coil deviates significantly from the target temperature, a higher target frequency is calculated. The compressor 122 will then operate at a faster speed to quickly cool and lower the indoor and coil temperatures. As the cooling process continues, the indoor temperature gradually decreases, and the coil temperature approaches the target temperature, reducing the deviation. At this point, the calculated target frequency will decrease accordingly, and the compressor 122's operating speed will slow down to avoid over-cooling, ensuring the indoor temperature remains stable within the set comfort range. Furthermore, when the indoor heat load changes (e.g., due to people entering or leaving the room, or electrical appliances being switched on or off, causing increases or decreases in indoor heat), the target frequency can be adjusted promptly based on the newly generated temperature deviation, changing the compressor 122's operating state to flexibly respond to different situations and ensure stable indoor temperature and good cooling performance.

[0068] The anti-cold air control method of the air conditioner 10 in this embodiment enables refined management of the cooling process. In the initial stage of cooling, it can effectively avoid excessively low coil temperature caused by excessively high compressor frequency 122, thereby significantly reducing the generation of cold air. After turning on the air conditioner 10, users are no longer subjected to a sudden attack of biting cold air. Instead, a gentle and comfortable cool airflow slowly fills the room, bringing a pleasant cool feeling. This comprehensively optimizes the user's experience at the moment the air conditioner 10 is turned on, effectively eliminating the potential health threat posed by direct cold air blowing.

[0069] In an optional embodiment, after the compressor 122 is controlled to run at the target frequency, the change of the set temperature can be detected. If the set temperature changes twice or more within a first preset time period and the cumulative change exceeds a preset threshold, the weight is determined according to the time interval of the set temperature change, and then the set temperatures before and after the change are weighted and averaged. If the processing result is still less than or equal to the indoor ambient temperature, the processing result is replaced with the target temperature of the indoor coil.

[0070] Assuming the first preset duration is set to 10 minutes and the preset threshold is set to 5°C, after the user turns on the air conditioner, the initial set temperature is 25°C, and the indoor ambient temperature is 28°C. The air conditioner 10 starts cooling operation according to the corresponding control process, and the compressor 122 operates at the calculated target frequency.

[0071] Within 10 minutes, the user, feeling it wasn't cool enough, adjusted the set temperature to 23℃, 20℃, and 27℃. The first adjustment from 25℃ to 23℃ was a change of 2℃; the second adjustment from 23℃ to 20℃ was a change of 3℃; and the third adjustment from 20℃ to 27℃ was a change of 7℃. The cumulative change was 2℃ + 3℃ + 7℃ = 12℃, exceeding the preset threshold of 5℃.

[0072] Assume the set temperature changes from 25℃ to 23℃ in 2 minutes; from 23℃ to 20℃ in 3 minutes; and from 20℃ to 27℃ in 5 minutes. The total time interval is 2 minutes + 3 minutes + 5 minutes = 10 minutes.

[0073] The first adjustment weight is 2 ÷ 10 = 0.2, the second adjustment weight is 3 ÷ 10 = 0.3, and the third adjustment weight is 5 ÷ 10 = 0.5.

[0074] The weighted average is calculated as follows: (23×0.2+20×0.3+27×0.5)≈24.1℃.

[0075] Assuming the current indoor ambient temperature is 26℃, and 24.1℃ is less than 26℃, then 24.1℃ is updated as the target temperature of the indoor coil. The air conditioner 10 recalculates the target frequency of the compressor 122 based on this new target temperature, so that the compressor 122 adjusts its operating state.

[0076] When users frequently change the set temperature, this method successfully avoids situations where the compressor 122 becomes overly constantly adjusting its operating state due to irregular fluctuations in the set temperature, or where it fails to respond quickly enough, resulting in ineffective operation. This effectively ensures that the compressor 122 always operates within a highly efficient and stable range, significantly extending its service life and reducing the potential risk of malfunction due to over-operation. Simultaneously, it significantly improves the overall energy efficiency of the air conditioner 10, reducing unnecessary energy consumption. This allows the air conditioner 10 to accurately maintain a comfortable and stable indoor environment even when dealing with complex and ever-changing user needs, creating a superior and reliable user experience.

[0077] The first preset duration can be any value between 2 minutes and 10 minutes, such as 2 minutes, 3 minutes, 4 minutes, 5 minutes, 6 minutes, 7 minutes, 8 minutes, 9 minutes, 10 minutes, etc. The preset threshold can be any value between 1℃ and 5℃, such as 1℃, 1.5℃, 2℃, 2.5℃, 3℃, 3.5℃, 4℃, 4.5℃, 5℃, etc.

[0078] When the first preset duration and the preset threshold are within the given range, multiple technical benefits are achieved. A smaller first preset duration, such as 2 minutes, combined with a smaller preset threshold, such as 1°C, enables the air conditioner 10 to respond extremely sensitively to small and rapid changes in the set temperature. This is crucial in scenarios with extremely high requirements for temperature stability, such as precision instrument laboratories or certain special medical environments, effectively preventing experimental errors caused by temperature fluctuations or affecting the normal operation of medical equipment.

[0079] As the initial preset duration gradually increases to 10 minutes and the preset threshold increases to 5°C, the air conditioner 10 focuses more on handling larger but relatively low-frequency changes in the set temperature. In typical home or office environments, this setting reduces frequent and significant adjustments to the compressor 122 caused by occasional, inaccurate temperature adjustments by the user. For example, in a family gathering scenario, the movement of people may lead to changes in temperature requirements. In this case, the air conditioner can comprehensively consider multiple adjustments made by the user without over-responding, allowing the compressor 122 to operate in a relatively stable state, reducing energy consumption, noise, and extending the lifespan of the compressor 122. At the same time, it maintains the indoor environment within a relatively comfortable and stable temperature range, improving the overall user experience and energy efficiency.

[0080] In an optional embodiment, after controlling the compressor 122 to operate at the target frequency, the change in indoor ambient temperature can also be monitored. If the indoor ambient temperature drops below the sum of the set temperature and the first preset buffer value within a second preset time period, the compressor 122 is turned off.

[0081] For example, if the set temperature is 26℃ and the first preset buffer value is 1℃, the compressor 122 will stop running when the indoor ambient temperature drops below 27℃ for 10 minutes. This prevents the indoor ambient temperature from becoming too low, keeping users in a more comfortable temperature range and avoiding energy waste and human discomfort caused by excessive cooling, such as feeling cold or excessively dry air.

[0082] The purpose of an air conditioner is to create a comfortable indoor environment, not simply to achieve the exact set temperature. The human body has a certain tolerance for a comfortable temperature range; it doesn't necessarily need to reach the exact set temperature to feel comfortable. For example, if the setting is 26℃, and the indoor temperature is close to 26℃, dropping to 27℃ (assuming a preset temperature difference of 1℃), the human body will already feel a relatively cool and comfortable environment. Continuing to cool the air to precisely reach 26℃ might actually lead to an excessively low indoor temperature, making people feel cold and the air too dry, thus affecting the overall comfort experience.

[0083] To ensure the indoor temperature accurately reaches the set temperature, the air conditioner 10 needs to continuously cool, especially as it approaches the set temperature, where cooling efficiency gradually decreases and energy consumption increases. This mechanism, however, pauses cooling once the temperature is within a reasonable range of the set temperature, avoiding the waste of energy for that final slight temperature difference. This achieves energy savings while meeting the user's basic comfort needs, reducing unnecessary energy waste.

[0084] The second preset duration can be any value between 5 min and 15 min, such as 5 min, 8 min, 10 min, 12 min, 15 min, etc. The first preset buffer value can be any value between 0.5℃ and 2℃, such as 0.5℃, 0.8℃, 1℃, 1.2℃, 1.5℃, 1.8℃, 2℃, etc.

[0085] For the second preset duration, a shorter duration, such as 5 minutes, allows the air conditioner 10 to respond quickly to changes in indoor ambient temperature. In small, well-insulated spaces with relatively stable indoor heat loads, a shorter duration ensures the air conditioner promptly detects temperature drops, preventing overcooling caused by delayed shutdown, quickly stabilizing the indoor temperature, and reducing unnecessary cooling energy consumption. A longer duration, such as 10 minutes, is suitable for larger spaces with higher thermal inertia or environments with frequent human activity leading to greater fluctuations in heat load. This setting gives the air conditioner 10 sufficient time to average out temperature fluctuations caused by various disturbances, preventing frequent start-stop cycles of the compressor 122 due to short-term temperature changes, reducing wear and tear on the compressor 122 and start-stop shocks, extending its lifespan, and allowing for a more precise maintenance of the indoor environment within a comfortable temperature range by comprehensively considering the overall temperature change trend before deciding whether to shut down.

[0086] For the first preset buffer value, a smaller value, such as 0.5℃, means that the air conditioner 10 will stop cooling when it is closer to the set temperature. In scenarios with high temperature accuracy requirements, such as certain electronic component manufacturing workshops or temperature-sensitive experimental environments, this can minimize overcooling or overheating while meeting specific needs, ensuring the stability and accuracy of the ambient temperature and avoiding the impact of small temperature deviations on product quality or experimental results. A larger value, such as 2℃, focuses more on the balance between energy saving and comfort. In general usage scenarios such as ordinary residences and offices, users have a certain tolerance for temperature. A slightly larger buffer value allows the air conditioner 10 to stop cooling when it is close to the set temperature but has not yet fully reached it. This can significantly reduce the operating time of the air conditioner 10 in the high-energy-consumption stage caused by the reduced cooling efficiency when approaching the set temperature, saving a lot of electricity. At the same time, it can also avoid excessively dry air and cold feeling caused by excessive pursuit of precise temperature, creating a more comfortable, energy-saving and relatively stable indoor environment for users.

[0087] In an optional embodiment, if the indoor ambient temperature rises above the sum of the set temperature and the second preset buffer value after the compressor 122 is turned off, the compressor 122 is restarted. The second preset buffer value is greater than the first preset buffer value.

[0088] For example, the set temperature is 26℃, the first preset buffer value is 1℃, and the second preset buffer value is 2℃. When the indoor ambient temperature drops below 27℃ within 10 minutes, the compressor 122 stops running. Afterwards, if the indoor ambient temperature rises back to above 28℃ (i.e., the sum of the set temperature 26℃ and the second preset buffer value 2℃), the compressor 122 will restart.

[0089] It's understandable that after compressor 122 is turned off, the indoor ambient temperature will gradually rise due to factors such as heat exchange between indoors and outdoors. Setting a second preset buffer value to determine the conditions for restarting compressor 122 effectively avoids frequent start-stop cycles. Without this buffer mechanism, compressor 122 might repeatedly start and stop with slight temperature fluctuations, which would not only significantly increase wear and tear on compressor 122, reducing its lifespan, but also consume more energy, as compressor 122 requires a large starting current each time it starts. By setting a reasonable second preset buffer value, compressor 122 is kept within a relatively stable temperature range before starting and stopping, reducing unnecessary start-stop cycles, extending compressor 122's lifespan, and reducing energy consumption.

[0090] Furthermore, from the perspective of maintaining indoor environmental comfort, the human body has a certain range of adaptability and perception to temperature changes. When the indoor temperature fluctuates within a reasonable range formed by the set temperature and the buffer value, the human body usually does not feel significant discomfort. This control strategy allows the indoor temperature to vary within a certain range, avoiding both the feeling of cold caused by excessively low temperatures and the loss of cooling effect due to excessively high temperatures, thus maintaining the indoor environmental temperature within a relatively comfortable dynamic equilibrium range and improving the overall user experience.

[0091] In an optional embodiment, after controlling the compressor 122 to run at the target frequency, the uniformity of the indoor ambient temperature can be detected every third preset time interval. If the non-uniformity of the indoor ambient temperature is detected to exceed the preset range, the frequency distribution of the compressor 122 in different areas is adjusted to ensure the uniformity of the indoor ambient temperature.

[0092] For example, the third preset duration is set to 10 minutes, and the preset range is that the maximum difference in indoor ambient temperature does not exceed 2℃. During the operation of the air conditioner, the temperature sensor network of the air conditioner 10 will collect and analyze the temperature of different areas of the room (such as different corners of the living room, different locations of the room, etc.) every 10 minutes. If it is found that the temperature of one area is 23℃ while the temperature of another area is 26℃, the temperature unevenness reaches 2℃, which exceeds the preset range of 2℃.

[0093] At this time, the air conditioner 10 will adjust the frequency distribution of the compressor 122 in the refrigeration circuit corresponding to different areas. For example, for the refrigeration circuit corresponding to the higher temperature area, the operating frequency of the compressor 122 in that area will be appropriately increased to increase the refrigerant flow and cooling capacity, causing the temperature in that area to drop rapidly; while for the lower temperature area, the frequency will be reduced to decrease the cooling capacity, thereby narrowing the temperature difference between different areas.

[0094] It's understandable that in a large space, such as a large office or villa, without such temperature uniformity control, areas near the air conditioning vents might be too cold, while areas farther away remain too hot, affecting work efficiency and comfort. The control methods described above ensure temperature uniformity throughout the entire indoor space, preventing discomfort caused by localized overheating or cooling.

[0095] Furthermore, by precisely adjusting the cooling capacity of different zones, indiscriminate cooling of the entire indoor space is avoided, reducing energy waste. For example, without this regional frequency adjustment, the compressor 122 might continuously operate at a higher frequency due to the presence of localized high-temperature areas, resulting in over-cooling of the entire indoor space and increased energy consumption. This control strategy, however, allows for targeted allocation of cooling resources to the areas that require it most, achieving energy savings and reducing consumption while ensuring overall indoor comfort. This improves the energy efficiency ratio of the air conditioning system, reduces operating costs, and aligns with modern green and energy-saving development trends.

[0096] The third preset duration can be any value between 5 min and 15 min, such as 5 min, 8 min, 10 min, 12 min, 15 min, etc. The preset range can be -3℃ to 3℃, which includes but is not limited to sub-intervals such as -1℃ to +1℃ and -2℃ to +2℃.

[0097] By flexibly selecting a third preset duration between 5 and 15 minutes, the air conditioner 10 can rationally determine when to analyze temperature uniformity and adjust the compressor 122 frequency according to the actual characteristics of different indoor spaces. This avoids meaningless frequent changes in the compressor 122 frequency (which may occur if the duration is too short), and also prevents the problem of excessively large indoor temperature differences not being adjusted in time due to prolonged lack of detection (which may occur if the duration is too long). This allows the compressor 122 to adjust the cooling capacity distribution to different areas in accordance with the rhythm of indoor thermal environment changes, ensuring indoor temperature uniformity while extending the service life of the compressor 122, reducing energy consumption, and achieving an energy-saving and comfortable cooling effect.

[0098] By setting the aforementioned preset ranges containing different sub-zones, the air conditioner 10 is provided with flexible control strategy options. Based on different usage scenarios and time-of-day needs (e.g., moderate temperature uniformity is required during the day when office staff are more active; requirements can be relaxed at night when no one is present), the preset ranges can be flexibly adjusted to suitable zones, allowing the air conditioning system to adaptively cope with diverse indoor environmental conditions. This maximizes energy utilization, extends equipment lifespan, and enhances the overall user experience while ensuring indoor temperature uniformity to the greatest extent possible.

[0099] Figure 2 This is a schematic structural diagram of a machine-readable storage medium 200 according to an embodiment of the present invention, such as... Figure 2 As shown, this embodiment of the invention also provides a machine-readable storage medium 200, on which a machine-executable program 201 is stored. When the machine-executable program 201 is executed by the processor 132, it implements the anti-cold air control method according to any of the above embodiments.

[0100] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any machine-readable storage medium 200 for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a system including processor 132 or other system that can fetch and execute instructions from an instruction execution system, apparatus or device).

[0101] For the purposes of this embodiment, the machine-readable storage medium 200 can be any means capable of containing, storing, communicating, propagating, or transmitting a program for use by or in conjunction with an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the machine-readable storage medium 200 include: an electrical connection (electronic device) having one or more wires, a portable computer disk drive (magnetic device), random access memory 131 (RAM), read-only memory 131 (ROM), erasable and editable read-only memory 131 (EPROM or flash memory 131), fiber optic devices, and portable optical disc read-only memory 131 (CDROM). Furthermore, the machine-readable storage medium 200 can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in the memory 131.

[0102] Figure 3 This is a schematic structural diagram of an air conditioner 10 according to an embodiment of the present invention, as shown below. Figure 3 As shown, this embodiment of the invention also provides an air conditioner 10. The air conditioner 10 includes at least an indoor unit 110, an outdoor unit 120, and a controller 130.

[0103] The indoor unit 110 is equipped with an indoor ambient temperature sensor 111 and an indoor coil temperature sensor 112. The outdoor unit 120 is communicatively connected to the indoor unit 110 and is equipped with an outdoor ambient temperature sensor 121. The controller 130 includes a memory 131 and a processor 132. The memory 131 stores a machine-executable program 201. When the machine-executable program 201 is executed by the processor 132, it is used to implement the anti-cold air control method of any of the above embodiments.

[0104] Specifically, controller 130 may include processor 132 adapted to execute stored instructions and memory 131 providing temporary storage space for the operation of said instructions during operation. Processor 132 may be a single-core processor 132, a multi-core processor 132, a computing cluster, or any other configuration. Memory 131 may include random access memory 131 (RAM), read-only memory 131, flash memory, or any other suitable storage system.

[0105] The processor 132 can be connected via a system interconnect (e.g., PCI, PCI-Express, etc.) to an I / O interface (input / output interface) suitable for connecting the air conditioner 10 to one or more I / O devices (input / output devices). The I / O devices may include, for example, a keyboard and indicating devices, wherein the indicating devices may include a touchpad or a touch screen, etc.

[0106] The processor 132 can also be linked via a system interconnect to a display interface suitable for connecting the controller 130 to a display device. The display device may include a display screen that is a built-in component of the controller 130. The display device may also include a computer monitor, television, or projector externally connected to the air conditioner 10. Furthermore, the network interface controller (NIC) 130 may be adapted to connect the controller 130 to a network via a system interconnect. In some embodiments, the NIC may use any suitable interface or protocol (such as an Internet Minicomputer System Interface) to transmit data. The network may be a cellular network, a radio network, a wide area network (WAN), a local area network (LAN), or the Internet, etc. Remote devices can connect to the controller 130 via the network.

[0107] The flowchart provided in this embodiment is not intended to indicate that the operations of the method will be performed in any particular order, or that all operations of the control method are included in every case. The control method may include additional operations. Within the scope of the technical concept provided by the control method in this embodiment, additional variations can be made to the above control method.

[0108] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A method for controlling cold air in an air conditioner, comprising: Upon receiving the power-on automatic operation command, the system obtains the user's set temperature and the indoor ambient temperature. If the set temperature is less than or equal to the indoor ambient temperature, the set temperature shall be used as the target temperature for the indoor coil. Monitor the real-time temperature of the indoor coil; The target frequency of the compressor is calculated based on the deviation between the real-time temperature and the target temperature; Start the compressor and control it to operate at the target frequency.

2. The method for controlling cold air according to claim 1, wherein, After the step of controlling the compressor to operate at the target frequency, the method further includes: Monitor changes in the set temperature; If the set temperature changes twice or more within a first preset time period, and the cumulative change exceeds a preset threshold, then the weight is determined based on the time interval of the set temperature change. A weighted average is performed on each set temperature before and after the change. If the result is still less than or equal to the indoor ambient temperature, the result is replaced with the target temperature of the indoor coil.

3. The method for controlling cold air according to claim 2, wherein, The first preset duration is any value between 2 minutes and 10 minutes; The preset threshold is any value between 1℃ and 5℃.

4. The method for controlling cold air according to claim 1, wherein, After the step of controlling the compressor to operate at the target frequency, the method further includes: Monitor the changes in the indoor ambient temperature; If the indoor ambient temperature drops below the sum of the set temperature and the first preset buffer value within a second preset time period, the compressor will be turned off.

5. The method for controlling cold air according to claim 4, wherein, The second preset duration is any value between 5 min and 15 min; The first preset buffer value is any value between 0.5℃ and 2℃.

6. The method for controlling cold air according to claim 4, wherein, After the step of shutting down the compressor, the following steps are also included: If the indoor ambient temperature rises to a level exceeding the sum of the set temperature and the second preset buffer value, the compressor will be restarted. The second preset buffer value is greater than the first preset buffer value.

7. The method for controlling cold air according to claim 1, wherein, After the step of controlling the compressor to operate at the target frequency, the method further includes: The uniformity of the indoor ambient temperature is detected every third preset time interval; If the unevenness of the indoor ambient temperature is detected to exceed a preset range, the frequency distribution of the compressor in different areas is adjusted to ensure the uniformity of the indoor ambient temperature.

8. The method for controlling cold air according to claim 1, wherein, The third preset duration is any value between 5 min and 15 min; The preset range is -3℃ to 3℃.

9. A machine-readable storage medium having a machine-executable program stored thereon, the machine-executable program, when executed by a processor, implementing the anti-cold air control method according to any one of claims 1-8.

10. An air conditioner, comprising: The indoor unit is equipped with an indoor ambient temperature sensor and an indoor coil temperature sensor. The outdoor unit is communicatively connected to the indoor unit and is equipped with an outdoor ambient temperature sensor. as well as A controller includes a memory, a processor, and a machine-executable program stored in the memory and running on the processor, wherein when the processor executes the machine-executable program, it is used to implement the anti-cold air control method according to any one of claims 1-8.

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