Control method and control device of air conditioner and air conditioner

Abstract

The application provides a control method and device of an air conditioner and the air conditioner. The method comprises the following steps: in response to a signal that the air conditioner is in a heating mode, obtaining pre-work information and temperature parameters of the air conditioner and indoor and outdoor environment temperatures; when the air conditioner has not performed defrosting operation, determining whether the temperature parameters meet a first defrosting condition; when the air conditioner has performed defrosting operation at least once, determining whether the temperature parameters meet the first defrosting condition and a second defrosting condition and whether the interval between adjacent defrosting operations is greater than or equal to a minimum defrosting interval; and when the temperature parameters meet the first defrosting condition and the second defrosting condition and the interval between adjacent defrosting operations is greater than or equal to the minimum defrosting interval, controlling the air conditioner to enter a defrosting mode. The first defrosting condition is obtained according to the outdoor environment temperature, the indoor environment temperature and the temperature parameters, and the second defrosting condition is obtained according to the temperature parameters. The method provided by the application makes the timing of the air conditioner entering the defrosting mode more accurate, avoids the problem that the air conditioner enters the defrosting mode too early or too late, and ensures that the defrosting is successfully, efficiently and completely completed.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and more particularly to a control method, control device, and air conditioner for air conditioning. Background Technology

[0002] In related technologies, existing air conditioner outdoor units often experience frost formation during startup or operation, especially in northern winters when temperatures are low. However, current defrosting control technologies for existing air conditioner outdoor units are not perfect and cannot accurately grasp the defrosting conditions required for defrosting. This often leads to problems such as untimely or premature defrosting, resulting in low defrosting efficiency and an inability to adapt to different environments. Summary of the Invention

[0003] This invention provides a control method, control device, and air conditioner to address the deficiencies in the prior art and achieve the following technical effects: by analyzing the air conditioner's operating status and combining it with the outdoor and indoor environmental conditions, defrosting entry conditions are set for different usage scenarios, making the defrosting control of the air conditioner more precise, that is, the timing of the air conditioner entering defrosting mode is more accurate, avoiding the problem of the air conditioner entering defrosting too early or too late, and ensuring that defrosting is completed smoothly, efficiently, and thoroughly.

[0004] A method for controlling an air conditioner according to a first aspect of the present invention includes:

[0005] In response to the signal that the air conditioner is in heating mode, the system obtains the air conditioner's pre-operation information and temperature parameters, as well as the outside ambient temperature and the indoor ambient temperature.

[0006] If the prior working information indicates that the air conditioner has not performed a defrosting operation, and the temperature parameter is determined to meet the first defrosting condition, then the air conditioner is controlled to enter the defrosting mode.

[0007] If the prior working information indicates that the air conditioner has performed at least one defrosting operation, and it is determined that the temperature parameter simultaneously meets the first defrosting condition and the second defrosting condition, and the interval between two adjacent defrosting operations is greater than or equal to the shortest defrosting interval, then the air conditioner is controlled to enter the defrosting mode.

[0008] The first defrosting condition is obtained based on the external ambient temperature, the indoor ambient temperature, and the temperature parameter, while the second defrosting condition is obtained based on the temperature parameter.

[0009] According to one embodiment of the present invention, the temperature parameters include the defrost detection temperature of the defrost sensor and the exhaust temperature of the compressor;

[0010] The first defrosting condition is that the defrosting detection temperature is less than or equal to the frost point temperature, the temperature difference between the exhaust temperature and the indoor ambient temperature is less than a first set temperature, the exhaust temperature is less than a second set temperature, and the condition lasts for at least a first set duration.

[0011] The frost point temperature is obtained based on the ambient temperature, and both the first set temperature and the second set temperature are obtained based on the rotational speed of the air conditioner's internal fan.

[0012] According to one embodiment of the present invention, the steps for obtaining the frost point temperature are as follows:

[0013] Obtain the region type of the area where the air conditioner is located, wherein the region type includes at least ordinary regions and regions prone to frost;

[0014] Based on the range of ambient temperature and the region type, the dew point temperature of the air conditioner under that region type is obtained.

[0015] The frost point temperature is obtained based on the dew point temperature.

[0016] According to an embodiment of the present invention, when the prior working information is that the air conditioner has not performed a defrosting operation, in the step of obtaining the frost point temperature based on the dew point temperature: the frost point temperature is equal to the dew point temperature;

[0017] Alternatively, if the prerequisite working information indicates that the air conditioner has performed at least one defrosting operation, the step of obtaining the frost point temperature based on the dew point temperature specifically includes:

[0018] Get the duration of the last defrost operation;

[0019] The error correction value is determined based on the range of the defrosting duration.

[0020] The error correction value and the dew point temperature are summed to obtain the frost point temperature, wherein the error correction value is positively correlated with the defrosting duration.

[0021] According to one embodiment of the present invention, after the steps of acquiring the pre-operational information and temperature parameters of the air conditioner in response to a signal that the air conditioner is in heating mode, and acquiring the ambient temperature and indoor temperature, the air conditioner control method further includes:

[0022] If the prior working information indicates that the air conditioner has performed at least one defrost operation, obtain the duration of the defrost operation in the previous defrost operation.

[0023] If the defrosting duration is determined to be greater than or equal to the maximum defrosting duration, and the temperature parameter satisfies the first defrosting condition, then the air conditioner is controlled to enter the defrosting mode.

[0024] According to one embodiment of the present invention, the temperature parameter further includes the minimum defrost detection temperature detected by the defrost sensor;

[0025] The second defrosting condition is that the difference between the current defrosting detection temperature and the minimum defrosting detection temperature is greater than or equal to a set temperature difference value and lasts for at least a second set duration.

[0026] According to one embodiment of the present invention, after the step of responding to a signal that the air conditioner is in heating mode, the air conditioner control method further includes:

[0027] Obtain the compressor's cumulative runtime and the defrost detection temperature from the defrost sensor;

[0028] If the cumulative running time and the defrost detection temperature meet the third defrost condition, the air conditioner is controlled to forcefully enter the defrost mode.

[0029] According to an embodiment of the present invention, the step of determining that the cumulative running time and the defrost detection temperature meet the third defrost condition, and controlling the air conditioner to forcibly enter the defrost mode, specifically includes:

[0030] If the cumulative running time is determined to be at least the first running time, and the defrost detection temperature is less than the third set temperature and remains so for at least the third set time, then the air conditioner is controlled to forcibly enter the defrost mode.

[0031] If the cumulative running time is determined to be at least the second running time, and the defrost detection temperature is less than the fourth set temperature and continues for at least the third set time, then the air conditioner is controlled to forcibly enter the defrost mode.

[0032] If the cumulative running time is determined to have reached at least the third running time, then the air conditioner is controlled to forcibly enter the defrost mode;

[0033] The first running time is less than the second running time, the second running time is less than the third running time, and the third set temperature is less than the fourth set temperature.

[0034] According to one embodiment of the present invention, after the steps of acquiring the pre-operational information and temperature parameters of the air conditioner in response to a signal that the air conditioner is in heating mode, and acquiring the ambient temperature and indoor temperature, the air conditioner control method further includes:

[0035] If the prior working information indicates that the air conditioner has performed a defrost operation at least once, then the shortest defrost interval is determined to be a preset default value.

[0036] Obtain the defrosting duration of the previous defrosting operation, and correct and update the shortest defrosting interval based on the defrosting duration.

[0037] According to an embodiment of the present invention, the step of correcting and updating the shortest defrost interval based on the defrost duration specifically includes:

[0038] Based on the defrosting duration being the first duration interval, the correction value for correcting the shortest defrosting interval is determined to be a positive value.

[0039] Based on the fact that the defrosting duration is the second duration interval, the correction value for correcting the shortest defrosting interval is determined to be zero.

[0040] Based on the fact that the defrosting duration is the third duration interval, the correction value for correcting the shortest defrosting interval is determined to be negative.

[0041] Based on the fact that the defrosting duration is the fourth duration interval, the shortest defrosting interval is corrected and updated to the minimum duration value;

[0042] Among them, the first time interval is shorter than the second time interval, the second time interval is shorter than the third time interval, and the third time interval is shorter than the fourth time interval.

[0043] An air conditioner control device according to a second aspect embodiment of the present invention includes:

[0044] The acquisition module is used to acquire the air conditioner's pre-operation information and temperature parameters in response to the signal that the air conditioner is in heating mode, as well as to acquire the outside ambient temperature and the indoor ambient temperature.

[0045] The first control module is used to determine if the temperature parameter meets the first defrosting condition when the pre-operation information indicates that the air conditioner has not performed a defrosting operation, and then control the air conditioner to enter the defrosting mode.

[0046] The second control module is used to determine, when the pre-work information indicates that the air conditioner has performed at least one defrosting operation, that the temperature parameter simultaneously meets the first defrosting condition and the second defrosting condition, and the interval between two adjacent defrosting operations is greater than or equal to the shortest defrosting interval, and then control the air conditioner to enter the defrosting mode.

[0047] The first defrosting condition is obtained based on the external ambient temperature, the indoor ambient temperature, and the temperature parameter, while the second defrosting condition is obtained based on the temperature parameter.

[0048] An air conditioner according to a third aspect embodiment of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the air conditioner control method as described in the first aspect embodiment of the present invention.

[0049] This invention provides a control method, control device, and air conditioner for air conditioning. By acquiring the pre-operation information of the air conditioner, the pre-defrosting status of the air conditioner is distinguished. Using at least one of the ambient temperature, indoor ambient temperature, and air conditioner temperature parameters, the defrosting entry conditions corresponding to different pre-defrosting statuses are obtained. Furthermore, during the heating operation of the air conditioner, it only enters defrosting mode when the above defrosting entry conditions are met. In this way, by analyzing the air conditioner's operating status and combining the indoor and outdoor environmental conditions, defrosting entry conditions for different usage scenarios are set, making the defrosting control of the air conditioner more precise. That is, the timing of the air conditioner entering defrosting mode is more accurate, avoiding the problem of the air conditioner entering defrosting too early or too late, and ensuring that defrosting is completed smoothly, efficiently, and thoroughly. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0051] Figure 1 This is a flowchart illustrating the air conditioner control method provided by the present invention;

[0052] Figure 2 This is a schematic diagram of the structure of the air conditioner control device provided by the present invention;

[0053] Figure 3 This is a schematic diagram of the structure of the electronic device provided by the present invention. Detailed Implementation

[0054] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0055] The air conditioner control method, control device, and air conditioner proposed in this invention are described below with reference to the accompanying drawings. Before providing a detailed description of the embodiments of this invention, the overall application scenario is first described. The air conditioner control method, control device, electronic device, and computer-readable storage medium of this invention can be applied locally to the air conditioner, to cloud platforms in the Internet field, or to other types of cloud platforms in the Internet field, or to third-party devices. These third-party devices may include various types such as mobile phones, tablets, laptops, in-vehicle computers, and other smart terminals.

[0056] The following description uses only the control method applicable to air conditioners as an example. It should be understood that the control method of this embodiment can also be applied to cloud platforms and third-party devices.

[0057] like Figure 1 As shown, an air conditioning control method according to a first aspect embodiment of the present invention includes:

[0058] Step S1: In response to the signal that the air conditioner is in heating mode, obtain the air conditioner's pre-operation information and temperature parameters, as well as the outside ambient temperature and indoor ambient temperature.

[0059] Step S2: If the prior working information indicates that the air conditioner has not performed a defrosting operation, and the temperature parameter is determined to meet the first defrosting condition, then the air conditioner is controlled to enter the defrosting mode.

[0060] Step S3: If the prior working information indicates that the air conditioner has performed at least one defrosting operation, determine that the temperature parameters simultaneously meet the first defrosting condition and the second defrosting condition, and the interval between two adjacent defrosting operations is greater than or equal to the shortest defrosting interval, then control the air conditioner to enter the defrosting mode.

[0061] The first defrosting condition is obtained based on the ambient temperature, indoor temperature, and temperature parameters, while the second defrosting condition is obtained based on the temperature parameters.

[0062] According to the air conditioner control method of the present invention, the specific working process is as follows: First, when the air conditioner is started, the controller obtains the current working mode of the air conditioner. When the controller determines that the air conditioner is in the normal heating mode, that is, after the controller receives the signal that the air conditioner is in the heating mode, the controller further obtains the ambient temperature of the outdoor environment where the outdoor unit of the air conditioner is located, the ambient temperature of the indoor environment where the indoor unit is located, and the temperature parameters of the air conditioner itself, and obtains and analyzes the working status of the air conditioner from the time it is turned on to the current time, thereby obtaining the pre-operation information of the air conditioner.

[0063] It should be explained that the pre-operation information is obtained by the controller analyzing the working status of the air conditioner from the time the heating mode is turned on to the current time period. The pre-operation information includes whether the air conditioner has performed a defrosting operation after the heating mode is turned on and how many defrosting operations have been performed. This invention does not make any special limitations here.

[0064] Furthermore, after obtaining the pre-operational information in step S1, the controller will determine the defrosting conditions that the air conditioner needs to meet when entering the defrosting mode based on the pre-operational information. The defrosting conditions will be different depending on the pre-operational information.

[0065] Specifically, if the pre-operation information indicates that the air conditioner has not performed a defrosting operation, the defrosting conditions include the first defrosting condition. In this case, the air conditioner will only enter the defrosting mode when the controller determines that the air conditioner's temperature parameters meet the first defrosting condition. It can be understood that the above situation is the entry condition for the air conditioner's first defrosting operation, and therefore there is no limit to the shortest defrosting interval.

[0066] If the pre-operation information indicates that the air conditioner has performed at least one defrosting operation, the defrosting conditions include a first defrosting condition and a second defrosting condition. At this time, when the controller determines that the air conditioner's temperature parameters simultaneously meet the first and second defrosting conditions, and determines that the interval between two adjacent defrosting operations is greater than or equal to the shortest defrosting interval, the air conditioner will enter the defrosting mode. It can be understood that the above situation is the entry condition for the air conditioner's non-first defrosting operation. At this time, the air conditioner needs to simultaneously meet the defrosting conditions and the minimum defrosting interval.

[0067] The first defrosting condition is obtained based on the ambient temperature, indoor temperature, and temperature parameters, while the second defrosting condition is obtained based on the temperature parameters.

[0068] It should be explained that the "temperature parameters of the air conditioner" mentioned above refer to the temperature parameters of the air conditioner as a whole or its internal components when the air conditioner is running. The temperature parameters may include at least one of the following: the compressor exhaust temperature, the compressor intake temperature, the temperature detected by the defrost sensor, the coil temperature of the indoor unit, and the coil temperature of the outdoor unit. This invention does not impose any special restrictions on the composition of the temperature parameters.

[0069] In related technologies, existing air conditioner outdoor units often experience frost formation during startup or operation, especially in northern winters when temperatures are low. However, current defrosting control technologies for existing air conditioner outdoor units are not perfect and cannot accurately grasp the defrosting conditions required for defrosting. This often leads to problems such as untimely or premature defrosting, resulting in low defrosting efficiency and an inability to adapt to different environments.

[0070] In summary, to address the technical problems existing in the aforementioned related technologies, this invention provides an air conditioner control method. This method obtains the pre-defrosting information of the air conditioner, distinguishes the pre-defrosting conditions, and uses at least one of the ambient temperature, indoor temperature, and air conditioner temperature parameters to obtain the defrosting entry conditions corresponding to different pre-defrosting conditions. Furthermore, during the heating operation of the air conditioner, it only enters defrosting mode when the above defrosting entry conditions are met. In this way, by analyzing the air conditioner's operating status and combining the indoor and outdoor environmental conditions, defrosting entry conditions are set for different usage scenarios, making the defrosting control of the air conditioner more precise. That is, the timing of the air conditioner entering defrosting mode is more accurate, avoiding the problem of the air conditioner entering defrosting too early or too late, and ensuring that defrosting is completed smoothly, efficiently, and thoroughly.

[0071] According to some embodiments of the present invention, in step S2, if the air conditioner enters the defrost mode for the first time, the air conditioner not only needs to meet the first defrost condition, but also needs to meet the limitation of the compressor usage time. At this time, the air conditioner is not subject to the limitation of the shortest defrost interval.

[0072] Specifically, the compressor usage time is limited as follows: after the air conditioner is first powered on, it is only allowed to enter defrost mode after the first defrost condition is met when the compressor's cumulative running time reaches at least 30 minutes and the single continuous running time reaches at least 1 minute.

[0073] It should be noted that, in addition to the two minutes required to determine the defrosting condition, the compressor must run continuously for at least three minutes before it is allowed to enter the defrosting mode.

[0074] In this embodiment, the precautions for resetting the compressor's cumulative running time of 30 minutes are as follows: First, when the air conditioner enters cooling or dehumidification mode, the compressor's cumulative running time is reset to zero; second, when the air conditioner is turned off by remote control or the temperature sensor is OFF, the compressor's cumulative running time is not reset to zero; third, when the air conditioner stops due to fault protection, the compressor's cumulative running time is not reset to zero.

[0075] According to other embodiments of the present invention, in step S3, if the air conditioner is not entering the defrost mode for the first time, the air conditioner needs to simultaneously meet the first defrost condition, the second defrost condition, the limitation on compressor usage time, and the limitation on the shortest defrost interval.

[0076] Specifically, after the first defrost cycle ends, when the compressor's cumulative running time reaches at least thirty minutes and the single continuous running time reaches at least one minute, and the interval between two defrost operations is longer than the shortest defrost interval, the air conditioner will be allowed to enter defrost mode only after simultaneously meeting the first defrost condition and the second defrost condition.

[0077] In this embodiment, the precautions for resetting the compressor's cumulative running time of 30 minutes are as follows: First, the compressor's cumulative running time is reset to zero when the air conditioner finishes defrosting, enters cooling, or enters dehumidification mode; Second, the compressor's cumulative running time is not reset when the air conditioner is turned off by remote control or when the temperature sensor is OFF; Third, the compressor's cumulative running time is not reset when the air conditioner stops due to fault protection.

[0078] In addition, the following precautions should be taken when resetting the interval between two defrosting operations in this embodiment: First, the interval between two defrosting operations is reset to zero when the air conditioner finishes defrosting, is powered off, switches to cooling, or switches to dehumidification; Second, the interval only calculates the time in heating mode, which includes the compressor running time and the temperature sensor OFF time; Third, the shutdown time is not reset, but the time after shutdown is not accumulated in the interval; Fourth, when the air conditioner stops due to fault protection, the interval is not reset, but the compressor shutdown time will be accumulated in the interval.

[0079] Furthermore, it should be noted that there are special cases in steps S2 and S3 where the defrost mode is not entered. That is, although the air conditioner meets the defrost entry conditions in step S2 or S3, it will not enter defrost mode if at least one of the following special cases occurs: First, the difference between the current indoor ambient temperature and the set indoor ambient temperature is greater than or equal to -1℃; second, the difference between the current indoor ambient temperature and the set indoor ambient temperature is less than -1℃ and the actual operating frequency of the compressor is less than its set operating frequency. In the above embodiments, it should be noted that when the indoor unit's set temperature is fixed at 10℃ (including the overseas "10℃ heating function"), the above special cases do not need to be considered; however, when the indoor unit transmits the real-time set temperature to the outdoor unit, the above special cases need to be considered.

[0080] According to some embodiments of the present invention, the temperature parameters include the defrost detection temperature of the defrost sensor and the exhaust temperature of the compressor. The first defrost condition is that the defrost detection temperature is less than or equal to the frost point temperature, the temperature difference between the exhaust temperature and the indoor ambient temperature is less than a first set temperature, the exhaust temperature is less than a second set temperature, and the condition lasts for at least a first set duration.

[0081] The frost point temperature is obtained based on the ambient temperature, while the first and second set temperatures are both obtained based on the speed of the air conditioner's internal fan.

[0082] In this embodiment, the first defrosting conditions include outdoor temperature conditions and indoor temperature conditions. The outdoor temperature conditions require that the defrosting detection temperature be less than or equal to the frost point temperature and last for at least a first set duration. The indoor temperature conditions require that the temperature difference between the exhaust temperature and the indoor ambient temperature be less than a first set temperature and that the exhaust temperature be less than a second set temperature and last for at least a first set duration.

[0083] Furthermore, in the outdoor temperature condition of the first defrosting condition, the steps for obtaining the frost point temperature are as follows:

[0084] Obtain the region type of the area where the air conditioner is located. The region type should include at least ordinary regions and regions prone to frost.

[0085] Based on the range of ambient temperature and the type of region, the dew point temperature of the air conditioner in that region is obtained.

[0086] The frost point temperature is obtained from the dew point temperature.

[0087] It is understood that in this embodiment, in order to obtain the frost point temperature, the controller first needs to determine the dew point temperature of the air conditioner under the local area type by using information such as the range of ambient temperature and the type of region, and then obtain the frost point temperature based on the dew point temperature.

[0088] To facilitate understanding, a specific embodiment is given below to explain how the dew point temperature is obtained. For example, the calculation of Tes (i.e., dew point temperature) is divided into ordinary areas and areas prone to frost. The calculation methods for the dew point temperature under different area types are as follows:

[0089] In ordinary areas: when the ambient temperature Tao ≥ 6℃, the dew point temperature Tes = -6℃; when -15℃ ≤ ambient temperature Tao < 6℃, the dew point temperature Tes = (5 × Tao - 72) / 7; when -23℃ ≤ ambient temperature Tao < -15℃, the dew point temperature Tes = (Tao - 69) / 4; when the ambient temperature Tao < -23℃, the dew point temperature Tes = -23℃.

[0090] In areas prone to frost: when the ambient temperature Tao ≥ 6℃, the dew point temperature Tes = -5℃; when -15℃ ≤ ambient temperature Tao < 6℃, the dew point temperature Tes = (13 × Tao - 120) / 21; when -23℃ ≤ ambient temperature Tao < -15℃, the dew point temperature Tes = (Tao - 45) / 4; when the ambient temperature Tao < -23℃, the dew point temperature Tes = -17℃.

[0091] Furthermore, after obtaining the dew point temperature, the controller will further determine the frost point temperature based on the obtained dew point temperature. Specifically, the step of obtaining the frost point temperature based on the dew point temperature includes:

[0092] Determine the frost point temperature based on the dew point temperature and prior work information.

[0093] In other words, the calculation method for the frost point temperature will change when the current working information is different (for example, the number of defrosting operations that the air conditioner has undergone is different).

[0094] For example, if the pre-operation information indicates that the air conditioner has not undergone defrosting, in the step of obtaining the frost point temperature based on the dew point temperature: the frost point temperature equals the dew point temperature. That is, during the first defrosting operation after heating is turned on, the frost point temperature equals the dew point temperature.

[0095] For example, if the prerequisite information indicates that the air conditioner has performed at least one defrosting operation, the steps to obtain the frost point temperature based on the dew point temperature specifically include:

[0096] Get the duration of the last defrost operation;

[0097] Determine the error correction value based on the range of defrosting duration;

[0098] The frost point temperature is obtained by summing the error correction value and the dew point temperature. The error correction value is positively correlated with the duration of defrosting.

[0099] In other words, after the first defrosting operation, starting from the second defrosting operation, the frost point temperature will be adjusted accordingly based on the duration of the previous defrosting operation. This means that the frost point temperature will be continuously corrected and updated during multiple defrosting operations, ensuring that the frost point temperature is consistent with the current air conditioner status each time defrosting is initiated. This allows the conditions for each defrosting operation to be updated and corrected according to different actual conditions, ensuring the accuracy and timeliness of the timing of each defrosting operation and greatly improving the defrosting efficiency and effect of the air conditioner.

[0100] Specifically, if the prior work information indicates that the air conditioner has performed at least one defrosting operation, the correction and update process for the frost point temperature is adjusted as follows:

[0101] If the defrosting duration is less than 2 minutes, the TL (frost point temperature) is adjusted according to the following formula: TL (frost point temperature) = Tes (dew point temperature) - 2℃;

[0102] When the defrosting duration is between 2 minutes and 7 minutes and 59 seconds, TL (frost point temperature) = Tes (dew point temperature);

[0103] When the defrosting duration is between 7 minutes and 59 seconds and 8 minutes and 59 seconds, TL (frost point temperature) = Tes (dew point temperature) + 2℃;

[0104] When the defrosting duration is greater than 8 minutes and 59 seconds, TL (frost point temperature) = Tes (dew point temperature) + 4℃.

[0105] Furthermore, in the indoor temperature condition of the first defrosting condition, both the first set temperature and the second set temperature are obtained based on the rotational speed of the indoor fan of the air conditioner.

[0106] For example, when the indoor fan is set to low speed or silent speed, the first set temperature is 25℃; when the indoor fan is set to any other speed, the first set temperature is 20℃.

[0107] When the internal fan speed setting is low or silent, the second set temperature is 45℃; when the internal fan speed setting is any other speed setting, the second set temperature is 42℃.

[0108] Of course, the above embodiment is only one of the many embodiments of the present invention, and does not constitute a specific limitation on the first set temperature and the second set temperature of the present invention.

[0109] According to some embodiments of the present invention, the temperature parameter further includes the minimum defrost detection temperature detected by the defrost sensor, and the second defrost condition is that the difference between the current defrost detection temperature and the minimum defrost detection temperature is greater than or equal to a set temperature difference value and lasts for at least a second set duration.

[0110] For example, the minimum defrost detection temperature Temin is determined as follows: In heating mode, with the compressor turned on and the four-way valve powered on, record the minimum value Temin of the average defrost detection temperature Te at 10-second intervals from 7 minutes to 12 minutes after the compressor starts running continuously.

[0111] Furthermore, if Temin-Te≥5℃ for 2 consecutive minutes, the second defrosting condition is met.

[0112] It is important to note that if the compressor stops within 7 minutes of starting up during heating or after defrosting, the compressor must be re-evaluated for continuous operation for 7 minutes. If the compressor can run continuously for more than 7 minutes, the Temin of the compressor's cumulative operation within 5 minutes after this time should be recorded. (If the compressor stops here, the Temin obtained before the stop should be used if the stop time is less than or equal to 60 minutes; if the stop time is greater than 60 minutes, the Temin of the compressor's continuous operation within 7 to 12 minutes should be recorded again.)

[0113] According to some embodiments of the present invention, after the steps of acquiring the pre-operational information and temperature parameters of the air conditioner in response to a signal that the air conditioner is in heating mode, and acquiring the ambient temperature and indoor temperature, the air conditioner control method further includes:

[0114] If the prior working information indicates that the air conditioner has performed at least one defrost operation, obtain the duration of the defrost operation in the previous defrost operation.

[0115] If the defrosting duration is greater than or equal to the maximum defrosting duration and the temperature parameters meet the first defrosting condition, then the air conditioner is controlled to enter the defrosting mode.

[0116] In this embodiment, unlike the defrosting entry condition in step S3, this embodiment adds a judgment on the defrosting duration of the previous defrosting operation. When the defrosting duration is greater than or equal to the maximum defrosting duration, the air conditioner only needs to meet the first defrosting condition and the minimum defrosting interval restriction, and does not need to meet the second defrosting condition to directly enter the defrosting mode.

[0117] For example, if the duration of the previous defrosting operation is greater than or equal to 9 minutes, the air conditioner only needs to determine the first defrosting condition and the shortest defrosting interval before starting the next defrosting operation.

[0118] According to some embodiments of the present invention, after the step of responding to a signal that the air conditioner is in heating mode, the air conditioner control method further includes:

[0119] Obtain the compressor's cumulative runtime and the defrost detection temperature from the defrost sensor;

[0120] Once the cumulative running time and defrost detection temperature meet the third defrost condition (forced defrost condition), the air conditioner will be forced to enter defrost mode.

[0121] It is understood that the usage scenario given in this embodiment is: the air conditioner does not need to go through the judgment of the first set condition, the second set condition, and the shortest defrost interval, etc. When the air conditioner meets the third defrost condition, the controller will control the air conditioner to force it into defrost mode. That is, the above embodiment is an embodiment of the air conditioner forcibly entering defrost mode.

[0122] Furthermore, the steps for determining whether the cumulative running time and defrost detection temperature meet the third defrost condition and forcing the air conditioner to enter defrost mode specifically include:

[0123] If the cumulative running time reaches at least the first running time and the defrost detection temperature is less than the third set temperature for at least the third set time, then the air conditioner will be forced to enter the defrost mode.

[0124] If the cumulative running time reaches at least the second running time and the defrost detection temperature is less than the fourth set temperature and continues for at least the third set time, then the air conditioner will be forced to enter the defrost mode.

[0125] If the cumulative running time reaches at least the third running time, the air conditioner will be forced into defrost mode.

[0126] The first running time is less than the second running time, the second running time is less than the third running time, and the third set temperature is less than the fourth set temperature.

[0127] For example, the steps to determine that the cumulative running time and defrost detection temperature meet the third defrost condition, and to control the air conditioner to force it into defrost mode, specifically include:

[0128] Once the compressor's cumulative running time reaches 45 minutes, if Te < -24℃ and this temperature remains for 2 minutes, the air conditioner will directly enter defrost mode (here, 45 minutes has higher priority than the shortest defrost interval).

[0129] Once the compressor's cumulative running time reaches 120 minutes, if Te < -18℃ and remains so for 2 minutes, the air conditioner will directly enter defrost mode.

[0130] When the compressor's cumulative running time reaches 480 minutes, the air conditioner will directly enter defrost mode.

[0131] The method for obtaining the shortest interval duration in this approach is described below.

[0132] According to some embodiments of the present invention, after the steps of acquiring the pre-operational information and temperature parameters of the air conditioner in response to a signal that the air conditioner is in heating mode, and acquiring the ambient temperature and indoor temperature, the air conditioner control method further includes:

[0133] If the prior working information indicates that the air conditioner has performed a defrost operation at least once, the shortest defrost interval is determined to be the preset default value;

[0134] Get the duration of the defrost operation from the previous defrost operation, and adjust and update the shortest defrost interval based on the duration of the defrost operation.

[0135] Furthermore, the steps of correcting and updating the shortest defrost interval based on the defrost duration specifically include:

[0136] Based on the defrosting duration as the first duration interval, the correction value for correcting the shortest defrosting interval is determined to be a positive value.

[0137] Based on the defrosting duration being the second duration interval, the correction value for the shortest defrosting interval is determined to be zero.

[0138] Based on the fact that the defrosting duration is the third duration interval, the correction value for correcting the shortest defrosting interval is determined to be negative.

[0139] Based on the fact that the defrosting duration is the fourth duration interval, the shortest defrosting interval is corrected and updated to the minimum duration value.

[0140] Among them, the first time interval is shorter than the second time interval, the second time interval is shorter than the third time interval, and the third time interval is shorter than the fourth time interval.

[0141] For example, after the first defrost cycle ends upon power-on, the default shortest defrost interval is 45 minutes.

[0142] The minimum defrost interval has been adjusted based on the duration of the previous defrost cycle. It should be noted that the defrost duration refers to the cumulative time from compressor start-up to shutdown during the defrost period. If a malfunction or protection mechanism causes the compressor to stop, the downtime is not included in the defrost duration. The adjustment method is as follows:

[0143] If the last defrost lasted less than 2 minutes, the shortest defrost interval for this time will be adjusted according to the following formula: Shortest defrost interval for this time = Shortest defrost interval for the last time + 5 minutes;

[0144] If the duration of the last defrost was between 2 minutes and 7 minutes and 59 seconds, the shortest defrost interval for this time will remain unchanged, that is, the shortest defrost interval for this time = the shortest defrost interval for the last time.

[0145] If the last defrost lasted between 7 minutes and 59 seconds and 8 minutes and 59 seconds, then the shortest defrost interval this time = the shortest defrost interval last time - 5 minutes;

[0146] If the last defrost lasted longer than 8 minutes and 59 seconds, the shortest defrost interval for this time will be set to 30 minutes.

[0147] In addition, the minimum defrosting interval is limited to 30 minutes, and the maximum is 75 minutes.

[0148] According to some specific embodiments of the present invention, after controlling the air conditioner to enter the defrost mode, the air conditioner control method further includes:

[0149] Based on the defrost start signal, the compressor is controlled to stop, and after 40 seconds, the four-way valve is controlled to switch direction. At the same time, the outdoor fan is controlled to stop, the compressor is controlled to start and run according to the program oil return platform setting. Then, the operating frequency of the compressor is controlled to increase to the target frequency of 95Hz (this target frequency is not limited in any way).

[0150] During defrost mode operation, it should be noted that compressor current protection and compressor discharge protection are effective during defrost. If the compressor stops due to protection or malfunction during defrost, defrost mode will be discontinued. Furthermore, the valve opening during defrost is 480°, and the defrost entry / exit fan speed is based on the fan speed within the first 3 minutes of compressor startup.

[0151] The protections involved during defrosting include: 1. System protection: TD exhaust high temperature prevention protection; 2. Electrical control protection: total current protection, compressor phase current protection, module over-temperature protection, drive module protection (including: IPM protection, compressor over-temperature / over-pressure protection, over / under-voltage protection, compressor stall / instantaneous compressor stop, compressor running out of step / compressor disengagement, position detection circuit fault, compressor overcurrent). When any of the above protections occur during defrosting, the compressor downtime is not counted within the defrosting time. After the compressor restarts, it immediately enters defrosting mode, and the operating frequency is limited by the oil return platform.

[0152] In addition, if the air conditioner is turned off and then turned on again during defrosting, the defrosting entry conditions need to be reassessed in order to re-enter defrosting.

[0153] According to some embodiments of the present invention, after the step of controlling the air conditioner to enter the defrost mode, the defrost control method for the air conditioner further includes:

[0154] After the air conditioner has been running in defrost mode for at least the minimum defrost time, if the air conditioner meets at least one of the first exit condition, the second exit condition, and the third exit condition, the air conditioner will exit the defrost mode and return to the heating mode.

[0155] The first condition is that the coil temperature of the outdoor unit is greater than the first exit temperature and lasts for at least the first exit duration; the second condition is that the coil temperature of the outdoor unit is greater than the second exit temperature and lasts for at least the second exit duration; and the third condition is that the defrosting duration of the air conditioner in defrosting mode meets the set conditions.

[0156] The first exit temperature is lower than the second exit temperature, and the first exit duration is longer than the second exit duration.

[0157] For example, when the air conditioner meets any of the following conditions in defrost mode, the defrost operation will revert to heating operation (the condition of the external coil will be judged after the compressor has been running for 1 minute).

[0158] The first condition is: the temperature of the outdoor unit's coil exceeds 5°C for 60 consecutive seconds; the second condition is: the temperature of the outdoor unit's coil exceeds 10°C for 20 consecutive seconds; the third condition is: tim = 0.25T-2, and tim is less than or equal to 12 minutes, where T is the defrosting interval during this complete defrosting process.

[0159] Furthermore, once the air conditioner meets the above defrost exit conditions, it will operate according to the following procedure: the compressor stops, the outdoor fan starts for 50 seconds and then the four-way valve engages, the outdoor fan starts for 60 seconds and then the compressor starts running according to the startup process.

[0160] The control device for an air conditioner provided by the present invention will be described below. The control device for an air conditioner described below can be referred to in correspondence with the control method for an air conditioner described above.

[0161] like Figure 2 As shown, the control device for an air conditioner according to a second aspect embodiment of the present invention includes:

[0162] The acquisition module 110 is used to acquire the pre-operation information and temperature parameters of the air conditioner in response to the signal that the air conditioner is in heating mode, as well as to acquire the outside ambient temperature and the indoor ambient temperature.

[0163] The first control module 120 is used to determine if the temperature parameters meet the first defrosting condition when the pre-work information indicates that the air conditioner has not performed a defrosting operation, and then control the air conditioner to enter the defrosting mode.

[0164] The second control module 130 is used to determine that the temperature parameters simultaneously meet the first defrosting condition and the second defrosting condition, and the time interval between two adjacent defrosting operations is greater than or equal to the shortest defrosting interval, when the pre-work information indicates that the air conditioner has performed at least one defrosting operation. Then, it controls the air conditioner to enter the defrosting mode.

[0165] The first defrosting condition is obtained based on the ambient temperature, indoor temperature, and temperature parameters, while the second defrosting condition is obtained based on the temperature parameters.

[0166] An air conditioner according to a third aspect of the present invention includes an indoor unit and an outdoor unit, and further includes a control device for the air conditioner as described in a second aspect of the present invention.

[0167] According to the air conditioner control device and air conditioner of the present invention, by acquiring the air conditioner's pre-defrosting information, the air conditioner distinguishes between pre-defrosting conditions and uses at least one of the external ambient temperature, indoor ambient temperature, and air conditioner temperature parameters to obtain the defrosting entry conditions corresponding to different pre-defrosting conditions. Furthermore, during the air conditioner's heating operation, the air conditioner only enters defrosting mode after meeting the above-mentioned defrosting entry conditions. In this way, by analyzing the air conditioner's operating status and combining the indoor and outdoor environmental conditions, defrosting entry conditions under different usage scenarios are set, making the air conditioner's defrosting control more precise, that is, the timing of the air conditioner entering defrosting mode is more accurate, avoiding the problem of the air conditioner entering defrosting too early or too late, and ensuring that defrosting is completed smoothly, efficiently, and thoroughly.

[0168] Figure 3An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 3 As shown, the electronic device may include a processor 810, a communication interface 820, a memory 830, and a communication bus 840. The processor 810, communication interface 820, and memory 830 communicate with each other via the communication bus 840. The processor 810 can call logic instructions stored in the memory 830 to execute air conditioner control methods.

[0169] Furthermore, the logical instructions in the aforementioned memory 830 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0170] On the other hand, the present invention also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer is able to execute the air conditioning control method provided by the above methods.

[0171] In another aspect, the present invention also provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to perform the air conditioning control methods provided by the above methods.

[0172] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0173] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of various embodiments or some parts of embodiments.

[0174] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that, include: In response to the signal that the air conditioner is in heating mode, the system obtains the air conditioner's pre-operation information and temperature parameters, as well as the outside ambient temperature and the indoor ambient temperature. If the prior working information indicates that the air conditioner has not performed a defrosting operation, and the temperature parameter is determined to meet the first defrosting condition, then the air conditioner is controlled to enter the defrosting mode. If the prior working information indicates that the air conditioner has performed at least one defrosting operation, and it is determined that the temperature parameter simultaneously meets the first defrosting condition and the second defrosting condition, and the interval between two adjacent defrosting operations is greater than or equal to the shortest defrosting interval, then the air conditioner is controlled to enter the defrosting mode. The first defrosting condition is obtained based on the external ambient temperature, the indoor ambient temperature, and the temperature parameter, and the second defrosting condition is obtained based on the temperature parameter. The temperature parameters include the defrost detection temperature of the defrost sensor and the exhaust temperature of the compressor. The first defrosting condition is that the defrosting detection temperature is less than or equal to the frost point temperature, the temperature difference between the exhaust temperature and the indoor ambient temperature is less than a first set temperature, the exhaust temperature is less than a second set temperature, and the condition lasts for at least a first set duration. The frost point temperature is obtained based on the ambient temperature, and both the first set temperature and the second set temperature are obtained based on the rotation speed of the air conditioner's internal fan. The steps for obtaining the frost point temperature are as follows: Obtain the region type of the area where the air conditioner is located, wherein the region type includes at least ordinary regions and regions prone to frost; Based on the range of ambient temperature and the region type, the dew point temperature of the air conditioner under that region type is obtained. The frost point temperature is obtained based on the dew point temperature. The temperature parameter also includes the minimum defrost detection temperature detected by the defrost sensor; The second defrosting condition is that the difference between the current defrosting detection temperature and the minimum defrosting detection temperature is greater than or equal to a set temperature difference value and lasts for at least a second set duration.

2. The air conditioning control method according to claim 1, characterized in that, When the prior working information indicates that the air conditioner has not undergone defrosting, in the step of obtaining the frost point temperature based on the dew point temperature: the frost point temperature is equal to the dew point temperature; Alternatively, if the prerequisite working information indicates that the air conditioner has performed at least one defrosting operation, the step of obtaining the frost point temperature based on the dew point temperature specifically includes: Get the duration of the last defrost operation; The error correction value is determined based on the range of the defrosting duration. The error correction value and the dew point temperature are summed to obtain the frost point temperature, wherein the error correction value is positively correlated with the defrosting duration.

3. The air conditioning control method according to claim 1, characterized in that, After the steps of obtaining the air conditioner's pre-operation information and temperature parameters in response to the signal that the air conditioner is in heating mode, and obtaining the outside ambient temperature and indoor ambient temperature, the method further includes: If the prior working information indicates that the air conditioner has performed at least one defrost operation, obtain the duration of the defrost operation in the previous defrost operation. If the defrosting duration is determined to be greater than or equal to the maximum defrosting duration, and the temperature parameter satisfies the first defrosting condition, then the air conditioner is controlled to enter the defrosting mode.

4. The air conditioning control method according to any one of claims 1 to 3, characterized in that, Following the step of responding to a signal indicating that the air conditioner is in heating mode, the method further includes: Obtain the compressor's cumulative runtime and the defrost detection temperature from the defrost sensor; If the cumulative running time and the defrost detection temperature meet the third defrost condition, the air conditioner is controlled to forcefully enter the defrost mode.

5. The air conditioning control method according to claim 4, characterized in that, The step of determining that the cumulative running time and the defrost detection temperature meet the third defrost condition, and controlling the air conditioner to forcibly enter the defrost mode, specifically includes: If the cumulative running time is determined to be at least the first running time, and the defrost detection temperature is less than the third set temperature and remains so for at least the third set time, then the air conditioner is controlled to forcibly enter the defrost mode. If the cumulative running time is determined to be at least the second running time, and the defrost detection temperature is less than the fourth set temperature and continues for at least the third set time, then the air conditioner is controlled to forcibly enter the defrost mode. If the cumulative running time is determined to have reached at least the third running time, then the air conditioner is controlled to forcibly enter the defrost mode; The first running time is less than the second running time, the second running time is less than the third running time, and the third set temperature is less than the fourth set temperature.

6. The air conditioning control method according to any one of claims 1 to 3, characterized in that, After the steps of obtaining the air conditioner's pre-operation information and temperature parameters in response to the signal that the air conditioner is in heating mode, and obtaining the outside ambient temperature and indoor ambient temperature, the method further includes: If the prior working information indicates that the air conditioner has performed a defrost operation at least once, then the shortest defrost interval is determined to be a preset default value. Obtain the defrosting duration of the previous defrosting operation, and correct and update the shortest defrosting interval based on the defrosting duration.

7. The air conditioning control method according to claim 6, characterized in that, The step of correcting and updating the shortest defrost interval based on the defrost duration specifically includes: Based on the defrosting duration being the first duration interval, the correction value for correcting the shortest defrosting interval is determined to be a positive value. Based on the fact that the defrosting duration is the second duration interval, the correction value for correcting the shortest defrosting interval is determined to be zero. Based on the fact that the defrosting duration is the third duration interval, the correction value for correcting the shortest defrosting interval is determined to be negative. Based on the fact that the defrosting duration is the fourth duration interval, the shortest defrosting interval is corrected and updated to the minimum duration value; Among them, the first time interval is shorter than the second time interval, the second time interval is shorter than the third time interval, and the third time interval is shorter than the fourth time interval.

8. A control device for an air conditioner, characterized in that, include: The acquisition module is used to acquire the air conditioner's pre-operation information and temperature parameters in response to the signal that the air conditioner is in heating mode, as well as to acquire the outside ambient temperature and the indoor ambient temperature. The first control module is used to determine if the temperature parameter meets the first defrosting condition when the pre-operation information indicates that the air conditioner has not performed a defrosting operation, and then control the air conditioner to enter the defrosting mode. The second control module is used to determine, when the pre-work information indicates that the air conditioner has performed at least one defrosting operation, that the temperature parameter simultaneously meets the first defrosting condition and the second defrosting condition, and the interval between two adjacent defrosting operations is greater than or equal to the shortest defrosting interval, and then control the air conditioner to enter the defrosting mode. The first defrosting condition is obtained based on the ambient temperature, the indoor temperature, and the temperature parameters, including the defrost detection temperature of the defrost sensor and the compressor exhaust temperature. The first defrost condition is that the defrost detection temperature is less than or equal to the frost point temperature, the temperature difference between the exhaust temperature and the indoor temperature is less than a first set temperature, the exhaust temperature is less than a second set temperature, and this condition persists for at least a first set duration. The frost point temperature is obtained based on the ambient temperature, and both the first and second set temperatures are obtained based on the rotational speed of the air conditioner's indoor fan. The steps for obtaining the frost point temperature are as follows: obtaining the region type of the area where the air conditioner is located, which includes at least ordinary areas and areas prone to frost; obtaining the dew point temperature of the air conditioner under the region type based on the range of the ambient temperature and the region type; and obtaining the frost point temperature based on the dew point temperature. The second defrosting condition is obtained based on the temperature parameter, which also includes the minimum defrosting detection temperature detected by the defrosting sensor. The second defrosting condition is that the difference between the current defrosting detection temperature and the minimum defrosting detection temperature is greater than or equal to a set temperature difference value and lasts for at least a second set duration.

9. An air conditioner, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the air conditioning control method as described in any one of claims 1 to 7.

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