Air conditioner high-temperature refrigeration control method, control device and air conditioner

Abstract

This invention provides a high-temperature cooling control method, control device, and air conditioner, relating to the field of air conditioning technology. The high-temperature cooling control method includes: acquiring the outdoor ambient temperature and determining whether to enter a high-temperature cooling mode based on the outdoor ambient temperature; determining whether the outdoor unit has unobstructed airflow; if the air conditioner enters the high-temperature cooling mode and the outdoor unit's airflow is obstructed, acquiring the current exhaust temperature of the compressor and compensating for the current exhaust temperature based on the outdoor ambient temperature to obtain a compensated exhaust temperature; and determining whether to enter a frequency-limiting mode based on the compensated exhaust temperature. Under conditions where the outdoor ambient temperature is high but the outdoor unit's heat exchange effect is good, the compressor can operate at a higher frequency, allowing the air conditioner to operate normally and effectively cool the indoor environment, thereby improving the air conditioner's cooling function and the user experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to a high-temperature cooling control method, control device, and air conditioner for an air conditioner. Background Technology

[0002] Air conditioners are widely used for regulating indoor temperature. In extremely hot weather, if the outdoor unit's heat exchange is poor, the compressor frequency is more likely to malfunction, causing the air conditioner to stop cooling. To avoid this situation, existing air conditioners generally control the air conditioner to enter a frequency reduction mode when the outdoor ambient temperature is high, and set the compressor's maximum operating frequency to a lower value to protect the compressor. However, this makes it easy for the air conditioner to enter the frequency reduction mode under high-temperature conditions, resulting in poor cooling effect on the indoor environment and affecting the user experience. Summary of the Invention

[0003] The purpose of this invention is to provide a high-temperature cooling control method, control device, and air conditioner to solve the technical problem that air conditioners easily enter a frequency reduction mode under high-temperature conditions, resulting in poor cooling and regulation of the indoor environment and affecting the user experience.

[0004] To address the above problems, this invention provides a high-temperature cooling control method for air conditioners, comprising:

[0005] Obtain the outdoor ambient temperature and determine whether to enter the high-temperature cooling mode based on the outdoor ambient temperature;

[0006] Determine if the outdoor unit is discharging air smoothly;

[0007] If the air conditioner enters the high-temperature cooling mode and the outdoor unit's airflow is obstructed, the current exhaust temperature of the compressor is obtained, and the current exhaust temperature is compensated by increasing the temperature based on the outdoor ambient temperature to obtain a compensated exhaust temperature.

[0008] Whether to enter the frequency reduction mode is determined based on the compensated exhaust temperature.

[0009] In the high-temperature cooling control method provided by this invention, the maximum operating frequency set by the air conditioner can be higher than the maximum operating frequency setting of existing air conditioners. This application judges the heat exchange effect of the outdoor unit and the cooling effect of the air conditioner by whether the outdoor unit has unobstructed airflow. In high-temperature cooling mode, when the outdoor unit has obstructed airflow, the current exhaust temperature is compensated according to the outdoor ambient temperature so that the air conditioner is controlled to enter the frequency limiting mode in advance before the actual operating frequency of the compressor reaches the maximum operating frequency. Thus, when the heat exchange effect of the outdoor unit is poor, the operating frequency of the compressor is controlled to stop increasing in advance, which effectively protects the compressor. When the outdoor unit has unobstructed airflow, the air conditioner is controlled to enter the frequency limiting mode according to the actual current exhaust temperature of the compressor. When the actual operating frequency of the compressor reaches the maximum operating frequency, the air conditioner is controlled to enter the frequency limiting mode. Thus, when the outdoor ambient temperature is high but the heat exchange effect of the outdoor unit is good, the compressor can operate at a higher operating frequency, and the air conditioner can operate normally to cool and regulate the indoor environment, thereby improving the cooling function of the air conditioner and the user experience.

[0010] Optionally, after obtaining the current exhaust temperature of the compressor, the method further includes: reducing the highest operating frequency of the air conditioner to the highest target frequency based on the outdoor ambient temperature.

[0011] Optionally, the step of reducing the highest operating frequency of the air conditioner to the highest target frequency based on the outdoor ambient temperature includes:

[0012] If the outdoor ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, then the frequency reduction value is determined to be the first frequency reduction value, and the difference between the highest operating frequency and the first frequency reduction value is taken as the highest target frequency.

[0013] And / or, if the outdoor ambient temperature is greater than the second temperature threshold and less than or equal to the third temperature threshold, then the frequency reduction value is determined to be the second frequency reduction value, and the difference between the highest operating frequency and the second frequency reduction value is taken as the highest target frequency;

[0014] And / or, if the outdoor ambient temperature is greater than the third temperature threshold, the frequency reduction value is determined to be the third frequency reduction value, and the difference between the highest operating frequency and the third frequency reduction value is taken as the highest target frequency;

[0015] Among them, the first temperature threshold, the second temperature threshold and the third temperature threshold increase sequentially, and the first frequency reduction value, the second frequency reduction value and the third frequency reduction value increase sequentially.

[0016] Optionally, the step of determining whether to enter the high-temperature cooling mode based on the outdoor ambient temperature includes:

[0017] Determine whether the outdoor ambient temperature is greater than or equal to a first temperature threshold and whether the duration of the temperature exceeds a first preset duration;

[0018] If so, then proceed to the high-temperature cooling mode.

[0019] Optionally, the step of determining whether the outdoor unit is properly ventilating includes:

[0020] Control the air conditioner to enter single outdoor fan operation mode, and the outdoor fan runs at a preset speed;

[0021] Obtain the total power of the air conditioner;

[0022] If the power difference between the total power and the power threshold is greater than or equal to the power difference threshold, then it is determined that the outdoor unit is not properly ventilated.

[0023] Optionally, in the single outdoor fan operation mode, the outdoor fan is controlled to operate at a first preset speed, a second preset speed, and a third preset speed, respectively;

[0024] The first unit power of the air conditioner at the first preset speed, the second unit power of the air conditioner at the second preset speed, and the third unit power of the air conditioner at the third preset speed are obtained;

[0025] If the power difference between the first unit power and the first power threshold is greater than or equal to the power difference threshold, the power difference between the second unit power and the second power threshold is greater than or equal to the power difference threshold, and the power difference between the third unit power and the third power threshold is greater than or equal to the power difference threshold, then it is determined that the outdoor unit is not properly ventilated.

[0026] Optionally, the speed range of the first preset speed is 200 rpm to 400 rpm;

[0027] The second preset speed range is 500 rpm to 700 rpm;

[0028] The third preset speed range is 800 rpm to 1000 rpm.

[0029] Optionally, the step of determining whether the outdoor unit is properly ventilating includes:

[0030] Control the air conditioner to enter cooling mode;

[0031] The initial external temperature and initial outdoor ambient temperature of the air conditioner are obtained, as well as the operating external temperature and operating outdoor ambient temperature after the air conditioner has been running for a second preset time.

[0032] If the temperature difference between the initial outdoor unit temperature and the initial outdoor ambient temperature is less than or equal to a first temperature difference threshold, the temperature difference between the operating outdoor unit temperature and the initial outdoor unit temperature is greater than or equal to a second temperature difference threshold, and the temperature difference between the operating outdoor ambient temperature and the initial outdoor ambient temperature is greater than or equal to a third temperature difference threshold, then it is determined that the outdoor unit's airflow is obstructed.

[0033] Optionally, the step of compensating the current exhaust temperature by increasing the temperature based on the outdoor ambient temperature to obtain a compensated exhaust temperature includes:

[0034] If the outdoor ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, then the exhaust compensation value is determined to be the first compensation value, and the sum of the current exhaust temperature and the first compensation value is taken as the compensated exhaust temperature.

[0035] And / or, if the outdoor ambient temperature is greater than the second temperature threshold and less than or equal to the third temperature threshold, then the exhaust compensation value is determined to be the second compensation value, and the sum of the current exhaust temperature and the second compensation value is taken as the compensated exhaust temperature;

[0036] And / or, if the outdoor ambient temperature is greater than the third temperature threshold, the exhaust compensation value is determined to be the third compensation value, and the sum of the current exhaust temperature and the third compensation value is taken as the compensated exhaust temperature;

[0037] The first temperature threshold, the second temperature threshold, and the third temperature threshold increase sequentially, as do the first compensation value, the second compensation value, and the third compensation value.

[0038] The present invention also provides a control device capable of executing the above-described high-temperature cooling control method for air conditioners, the control device comprising:

[0039] The acquisition module is used to acquire the outdoor ambient temperature and the current exhaust temperature of the compressor;

[0040] The judgment module determines whether to enter the high-temperature cooling mode based on the outdoor ambient temperature, and also determines whether the outdoor unit is unobstructed in terms of airflow.

[0041] The control module performs temperature compensation on the current exhaust temperature based on the outdoor ambient temperature to obtain a compensated exhaust temperature, and determines whether to enter the frequency reduction mode based on the compensated exhaust temperature.

[0042] The present invention also provides an air conditioner, including a computer-readable storage medium storing a computer program and a controller, wherein the computer program is read and executed by the controller to implement the above-described high-temperature cooling control method for the air conditioner.

[0043] The present invention also provides a computer-readable storage medium storing a computer program, which is read and executed by a controller to implement the above-described high-temperature cooling control method for an air conditioner.

[0044] The control device, air conditioner, and computer-readable storage medium provided in this embodiment can all execute the above-described high-temperature cooling control method for air conditioners, and include all the beneficial effects of the high-temperature cooling control method, which will not be elaborated here. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of the present 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 only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0046] Figure 1 This is a schematic flowchart of a first high-temperature refrigeration control method according to an embodiment of the present invention;

[0047] Figure 2 This is a schematic flowchart of a second high-temperature refrigeration control method according to an embodiment of the present invention;

[0048] Figure 3 This is a flowchart illustrating a first method for determining whether the outdoor unit is properly ventilating, according to an embodiment of the present invention.

[0049] Figure 4 This is a flowchart illustrating a second method for determining whether the outdoor unit is properly ventilating, according to an embodiment of the present invention.

[0050] Figure 5 This is a schematic diagram of the structure of a control device according to an embodiment of the present invention.

[0051] Explanation of reference numerals in the attached figures:

[0052] 51-Acquisition module; 52-Judgment module; 53-Control module. Detailed Implementation

[0053] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0054] Figure 1 This is a schematic flowchart of a first high-temperature refrigeration control method according to an embodiment of the present invention. Figure 1 As shown, the high-temperature cooling control method includes:

[0055] S102 acquires the outdoor ambient temperature and determines whether to enter the high-temperature cooling mode based on the outdoor ambient temperature.

[0056] S104 determines whether the outdoor unit is ventilating smoothly.

[0057] During the cooling operation of an air conditioner, the outdoor ambient temperature indicates the temperature of the heat exchange environment of the outdoor unit. When the outdoor ambient temperature is high, the air conditioner enters a high-temperature cooling mode. Whether the outdoor unit can unblock airflow indicates the heat exchange effect between the outdoor unit and the outdoor environment. When the outdoor unit can unblock airflow, even if the outdoor ambient temperature is high and the air conditioner is in high-temperature cooling mode, the outdoor unit still has a good heat exchange effect with the outdoor environment. Correspondingly, the compressor can maintain its normal operation, and the air conditioner still has a good cooling effect on the indoor environment. When the outdoor unit cannot unblock airflow, the heat exchange effect between the outdoor unit and the outdoor environment is poor. If the outdoor ambient temperature is high and the air conditioner is in high-temperature cooling mode, under the dual influence of high outdoor ambient temperature and poor heat exchange effect between the outdoor unit and the outdoor environment, the air conditioner's cooling effect on the indoor environment is poor. The compressor will further increase its operating frequency to improve its cooling effect. As the operating frequency increases, the high pressure of the compressor is prone to become too high and may cause malfunction.

[0058] If the air conditioner enters the high-temperature cooling mode and the outdoor unit's airflow is obstructed, the S106 will obtain the current exhaust temperature of the compressor and compensate for the current exhaust temperature by increasing the temperature based on the outdoor ambient temperature to obtain the compensated exhaust temperature.

[0059] S108 determines whether to enter the frequency reduction mode based on the compensated exhaust temperature.

[0060] The current discharge temperature of the compressor can accurately and directly characterize the operating status of the compressor. The air conditioner of this application is set with the highest frequency at which the compressor can operate in high-temperature cooling mode, that is, the highest operating frequency, and this highest operating frequency is higher than the highest operating frequency usually set by existing air conditioners. At the same time, the air conditioner of this application stores the correspondence between the compressor operating frequency and the discharge temperature. Specifically, the compressor operating frequency and the compressor discharge temperature are positively correlated.

[0061] When the outdoor ambient temperature is high and the heat exchange effect between the outdoor unit and the outdoor environment is poor, the compressor is in a condition prone to failure. The higher the outdoor ambient temperature, the worse the heat exchange effect of the outdoor unit, the higher the high pressure of the compressor, and the more prone it is to failure. To address this, this application determines the exhaust compensation value based on the outdoor ambient temperature. Specifically, the exhaust compensation value is positively correlated with the outdoor ambient temperature. The exhaust compensation value is added to the current exhaust temperature to obtain the compensated exhaust temperature. The air conditioner compares the increased compensated exhaust temperature with the highest exhaust temperature corresponding to the compressor's highest operating frequency stored in its database. When the compensated exhaust temperature is greater than or equal to the highest exhaust temperature, that is, when the actual operating frequency of the compressor has not yet reached the highest operating frequency, the air conditioner is preemptively controlled to enter the frequency reduction mode. This prevents the compressor's operating frequency from increasing further when the heat exchange effect of the outdoor unit is poor, thus effectively protecting the compressor.

[0062] When the outdoor ambient temperature is high and the air conditioner is in high-temperature cooling mode, if the outdoor unit's airflow is unobstructed, the outdoor unit can still maintain a good heat exchange effect, and the air conditioner can still provide a good cooling effect for the indoor environment. At this time, there is no need to compensate for the current exhaust temperature. Instead, the current exhaust temperature is compared with the maximum exhaust temperature. When the current exhaust temperature is greater than or equal to the maximum exhaust temperature, that is, when the compressor's actual operating frequency reaches the maximum operating frequency, the air conditioner is then controlled to enter the frequency reduction mode. This allows the air conditioner to operate at a higher operating frequency when the outdoor ambient temperature is high but the outdoor unit's heat exchange effect is good. The air conditioner can then operate normally to provide a cooling effect for the indoor environment, thereby improving the air conditioner's cooling function and the user's experience.

[0063] In the high-temperature cooling control method provided in this embodiment, the maximum operating frequency set by the air conditioner can be higher than the maximum operating frequency setting of existing air conditioners. This application judges the heat exchange effect of the outdoor unit and the cooling effect of the air conditioner by whether the outdoor unit can unblock the airflow. In the high-temperature cooling mode, when the outdoor unit cannot unblock the airflow, the current exhaust temperature is compensated according to the outdoor ambient temperature so that the air conditioner is controlled to enter the frequency limiting mode in advance before the actual operating frequency of the compressor reaches the maximum operating frequency. Thus, when the heat exchange effect of the outdoor unit is poor, the operating frequency of the compressor is controlled to stop increasing in advance, which effectively protects the compressor. When the outdoor unit can unblock the airflow, the air conditioner is controlled to enter the frequency limiting mode according to the actual current exhaust temperature of the compressor. When the actual operating frequency of the compressor reaches the maximum operating frequency, the air conditioner is controlled to enter the frequency limiting mode. Thus, when the outdoor ambient temperature is high but the heat exchange effect of the outdoor unit is good, the compressor can operate at a higher operating frequency, and the air conditioner can operate normally to cool and regulate the indoor environment, thereby improving the cooling function of the air conditioner and the user experience.

[0064] In this embodiment, after obtaining the current exhaust temperature of the compressor in step S106, the method further includes: reducing the maximum operating frequency of the air conditioner to the maximum target frequency based on the outdoor ambient temperature. When the air conditioner enters the high-temperature cooling mode and the outdoor unit's airflow is obstructed, in addition to the above-mentioned temperature compensation based on the outdoor ambient temperature to obtain the compensated exhaust temperature, the frequency reduction value can also be determined based on the outdoor ambient temperature. Specifically, the frequency reduction value is positively correlated with the outdoor ambient temperature. The maximum target frequency is obtained by subtracting the frequency reduction value from the set maximum operating frequency. The maximum target frequency is lower than the maximum operating frequency, and the maximum target exhaust temperature corresponding to the maximum target frequency is lower than the maximum exhaust temperature. The air conditioner compares the compensated exhaust temperature with the maximum target exhaust temperature. When the compensated exhaust temperature is greater than or equal to the maximum target exhaust temperature, the air conditioner is controlled to enter the frequency reduction mode. This further reduces the actual maximum operating frequency of the compressor when the heat exchange effect of the outdoor unit is poor, thereby improving the control of the compressor's operating frequency and preventing it from increasing further, thus effectively protecting the compressor.

[0065] Specifically, the step of reducing the air conditioner's highest operating frequency to the highest target frequency based on the outdoor ambient temperature includes: if the outdoor ambient temperature is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold, then the frequency reduction value is determined to be a first reduction value, and the difference between the highest operating frequency and the first reduction value is taken as the highest target frequency; if the outdoor ambient temperature is greater than the second temperature threshold and less than or equal to a third temperature threshold, then the frequency reduction value is determined to be a second reduction value, and the difference between the highest operating frequency and the second reduction value is taken as the highest target frequency; if the outdoor ambient temperature is greater than the third temperature threshold, then the frequency reduction value is determined to be a third reduction value, and the difference between the highest operating frequency and the third reduction value is taken as the highest target frequency; wherein the first temperature threshold, the second temperature threshold, and the third temperature threshold increase sequentially, and the first reduction value, the second reduction value, and the third reduction value increase sequentially.

[0066] When the outdoor ambient temperature is between the first and second temperature thresholds, the air conditioner enters a high-temperature cooling mode. Since the outdoor temperature is relatively low, the outdoor unit, although blocked, still has some heat exchange capacity. Therefore, a smaller first frequency reduction value is determined as the frequency reduction value. Consequently, the compressor's maximum target frequency is reduced less, ensuring compressor protection while preventing an excessive reduction in the compressor's maximum operating frequency, which could cause the air conditioner to enter the frequency reduction mode prematurely and affect its cooling effect. Similarly, by comparing the outdoor ambient temperature with the second and third temperature thresholds, the second and third frequency reduction values ​​are set in a stepped manner, resulting in a stepped maximum target frequency. This increases the compressor's frequency operating range while ensuring compressor protection, thus ensuring the air conditioner's cooling effect on the indoor environment.

[0067] Specifically, the temperature range of the first temperature threshold can be 43℃~46℃; the temperature range of the second temperature threshold can be 46℃~50℃; and the temperature range of the third temperature threshold can be 50℃~54℃.

[0068] In this embodiment, step S106, which involves increasing the temperature of the current exhaust gas based on the outdoor ambient temperature to obtain a compensated exhaust gas temperature, includes: if the outdoor ambient temperature is greater than or equal to a first temperature threshold and less than or equal to a second temperature threshold, then the exhaust gas compensation value is determined to be a first compensation value, and the sum of the current exhaust gas temperature and the first compensation value is used as the compensated exhaust gas temperature; if the outdoor ambient temperature is greater than the second temperature threshold and less than or equal to a third temperature threshold, then the exhaust gas compensation value is determined to be a second compensation value, and the sum of the current exhaust gas temperature and the second compensation value is used as the compensated exhaust gas temperature; if the outdoor ambient temperature is greater than the third temperature threshold, then the exhaust gas compensation value is determined to be a third compensation value, and the sum of the current exhaust gas temperature and the third compensation value is used as the compensated exhaust gas temperature; wherein the first temperature threshold, the second temperature threshold, and the third temperature threshold increase sequentially, and the first compensation value, the second compensation value, and the third compensation value increase sequentially.

[0069] By comparing the outdoor ambient temperature with the first, second, and third temperature thresholds, the first, second, and third compensation values ​​are set in a step-by-step manner, thereby obtaining the highest target frequency in a step-by-step manner. This further increases the frequency operating range of the compressor while ensuring compressor protection, thus ensuring the air conditioner's cooling and regulating effect on the indoor environment.

[0070] The first, second, and third compensation values ​​can be set based on experimental test results. According to the actual test results, the corresponding exhaust pressure when compressor frequency reduction (exhaust pressure too high) is required is determined. Then, the difference between this value and the exhaust frequency reduction temperature parameter is calculated, and this difference serves as the exhaust compensation value. Specifically, the exhaust frequency reduction temperature includes exhaust shutdown temperature, exhaust rapid frequency reduction temperature, exhaust slow frequency reduction temperature, exhaust frequency increase restriction temperature, and exhaust frequency limit release temperature. The order is: exhaust shutdown temperature > exhaust rapid frequency reduction temperature > exhaust slow frequency reduction temperature > exhaust frequency increase restriction temperature > exhaust frequency limit release temperature.

[0071] In this embodiment, step S102, which determines whether to enter the high-temperature cooling mode based on the outdoor ambient temperature, includes: determining whether the outdoor ambient temperature is greater than or equal to a first temperature threshold and its duration is greater than a first preset duration; if so, it is determined to enter the high-temperature cooling mode. The outdoor ambient temperature is acquired in real time. When the outdoor ambient temperature is greater than or equal to the first temperature threshold and its duration is greater than the first preset duration, the accuracy and stability of the outdoor ambient temperature detection are ensured, thereby determining that the air conditioner has entered the high-temperature cooling mode and preventing misjudgment; when the outdoor ambient temperature is greater than or equal to the first temperature threshold but its duration is less than the first preset duration, or when the outdoor ambient temperature is less than the first temperature threshold, the air conditioner maintains its current operating mode.

[0072] Specifically, the first preset duration can range from 5 minutes to 10 minutes.

[0073] In this embodiment, the step of S104 determining whether the outdoor unit is properly ventilating can be carried out in the following way: controlling the air conditioner to enter the single outdoor fan operation mode, and the outdoor fan running at a preset speed; obtaining the total power of the air conditioner; if the power difference between the total power and the power threshold is greater than or equal to the power difference threshold, then it is determined that the outdoor unit is not properly ventilating. When the air conditioner is in good operating condition and the outdoor unit's airflow is unobstructed, in single outdoor fan operation mode, the total power of the air conditioner when the outdoor fan runs at a preset speed is used as the power threshold. During use, the air conditioner is controlled to start cooling, and only the outdoor fan is started and runs at the preset speed, while the indoor fan and compressor remain off. The total power of the air conditioner at this time is obtained, and the difference between the total power and the power threshold corresponding to the same speed is compared with the preset power difference threshold. When the difference is greater than or equal to the power difference threshold, it indicates that the total power of the air conditioner is too high, the outdoor unit's operating power is too high, and the outdoor unit's ventilation effect is poor, thus determining that the outdoor unit's airflow is not smooth. When the difference is less than the power difference threshold, it indicates that the outdoor unit is operating well and the airflow is unobstructed, thus determining that the outdoor unit's airflow is smooth.

[0074] Optionally, the above steps can be repeated multiple times at different preset speeds. Specifically, in single outdoor fan operation mode, the outdoor fan is controlled to run at a first preset speed, a second preset speed, and a third preset speed, respectively. The first total power of the air conditioner at the first preset speed, the second total power of the air conditioner at the second preset speed, and the third total power of the air conditioner at the third preset speed are obtained. If the power difference between the first total power and the first power threshold is greater than or equal to the power difference threshold, the power difference between the second total power and the second power threshold is greater than or equal to the power difference threshold, and the power difference between the third total power and the third power threshold is greater than or equal to the power difference threshold, then it is determined that the outdoor unit's airflow is not smooth. Setting the outdoor unit to run at different preset speeds and obtaining the corresponding total power ensures the accuracy of the detection results. When the difference between the total power and the stored corresponding power threshold is greater than or equal to the power difference threshold multiple times, it reduces the possibility of misjudgment caused by a single detection or occasional cases where the detected total power is too high.

[0075] Specifically, the first preset speed range is 200 rpm to 400 rpm; the second preset speed range is 500 rpm to 700 rpm; and the third preset speed range is 800 rpm to 1000 rpm. The power difference threshold range can be 15W to 20W.

[0076] Of course, in some other embodiments, only two or four detections may be performed, and it is not limited to the three times mentioned above.

[0077] The following steps can be taken to obtain and store the total power of the air conditioner at the corresponding outdoor unit preset speed under good operating conditions: Set the laboratory conditions as follows: outdoor ambient temperature 35℃ (outdoor unit air outlet is unobstructed, no cover or obstruction, no wind or additional airflow), control the air conditioner to enter the single outdoor fan operation mode, control the outdoor unit to run at the first preset speed, the second preset speed and the third preset speed for a certain period of time, and measure the corresponding total power of the air conditioner as the first power threshold, the second power threshold and the third power threshold and store them in the air conditioner.

[0078] In this embodiment, in the step S104 of determining whether the outdoor unit is properly ventilating, in addition to the above method, the following operations can also be performed: control the air conditioner to enter the cooling mode; obtain the initial outdoor temperature and initial outdoor ambient temperature of the air conditioner, as well as the operating outdoor temperature and operating outdoor ambient temperature after the air conditioner has been running for a second preset time; if the temperature difference between the initial outdoor temperature and the initial outdoor ambient temperature is less than or equal to a first temperature difference threshold, the temperature difference between the operating outdoor temperature and the initial outdoor temperature is greater than or equal to a second temperature difference threshold, and the temperature difference between the operating outdoor ambient temperature and the initial outdoor ambient temperature is greater than or equal to a third temperature difference threshold, then it is determined that the outdoor unit is not properly ventilating.

[0079] The air conditioner is controlled to turn on and enter the cooling mode. Specifically, the outdoor unit, indoor unit and compressor are all started. The temperature of the outdoor unit coil at the time of start-up is obtained as the initial outdoor coil temperature and the outdoor ambient temperature is obtained as the initial outdoor ambient temperature. When the air conditioner has been running stably for a second preset time, the temperature of the outdoor unit coil at this time is obtained as the operating outdoor coil temperature and the outdoor ambient temperature is obtained as the operating outdoor ambient temperature. When the temperature difference between the initial outdoor coil temperature and the initial outdoor coil temperature is less than or equal to the first temperature difference threshold, it indicates that the initial outdoor coil temperature is close to the initial outdoor ambient temperature at startup, and the outdoor coil temperature is in a fully cooled state. This reduces the influence of insufficient cooling of the outdoor coil and its own temperature on the misjudgment of the outdoor unit's status. Then, the initial outdoor coil temperature and the operating outdoor coil temperature are compared. When the temperature difference between the operating outdoor coil temperature and the initial outdoor coil temperature is greater than or equal to the second temperature difference threshold, it indicates that the outdoor coil temperature rise is too large. At the same time, the initial outdoor ambient temperature and the operating outdoor ambient temperature are compared. When the temperature difference between the operating outdoor ambient temperature and the initial outdoor ambient temperature is greater than or equal to the third temperature difference threshold, it indicates that the outdoor ambient temperature near the outdoor unit rises too large. Combining the temperature differences between the operating outdoor coil temperature and the initial outdoor coil temperature, and the operating outdoor ambient temperature and the initial outdoor ambient temperature, it is determined that the outdoor unit is blocked and the heat exchange effect is poor, thus determining that the outdoor unit's airflow is not smooth.

[0080] In this process, the temperature difference between the initial outer plate temperature and the initial outer plate temperature, the temperature difference between the operating outer plate temperature and the initial outer plate temperature, and the temperature difference between the operating outdoor ambient temperature and the initial outdoor ambient temperature are all considered simultaneously to improve the accuracy of the judgment and reduce misjudgments.

[0081] Specifically, the temperature range of the first temperature difference threshold can be 1℃ to 3℃, preferably 2℃; the temperature range of the second temperature difference threshold can be 4℃ to 6℃, preferably 5℃; and the temperature range of the third temperature difference threshold can be 3℃ to 5℃, preferably 4℃. Specifically, the duration of the second preset time can be 5min to 10min.

[0082] Figure 2 This is a schematic flowchart of a second high-temperature cooling control method according to an embodiment of the present invention. Figure 2 As shown, the high-temperature cooling control method includes:

[0083] The air conditioner starts in cooling mode when turned on.

[0084] S201 obtains the outdoor ambient temperature.

[0085] S202 Determine whether the outdoor ambient temperature is greater than or equal to the first temperature threshold and the duration is greater than the first preset duration; if yes, proceed to step S203; if no, continue to proceed to step S201.

[0086] S203 has entered high-temperature cooling mode.

[0087] S204 Determines whether the outdoor unit is ventilating smoothly; if yes, proceed to step S205; if no, continue to step S206.

[0088] S205 uses the preset highest operating frequency as the highest target frequency.

[0089] S206 obtains the current discharge temperature of the compressor.

[0090] S207 Determine whether the outdoor ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold; if yes, proceed to step S208; if no, proceed to step S209.

[0091] S208 determines the exhaust compensation value as the first compensation value, and uses the sum of the current exhaust temperature and the first compensation value as the compensated exhaust temperature; it also determines the frequency reduction value as the first frequency reduction value, and uses the difference between the highest operating frequency and the first frequency reduction value as the highest target frequency.

[0092] S209 determines whether the outdoor ambient temperature is greater than the second temperature threshold and less than or equal to the third temperature threshold; if yes, proceed to step S210; if no, proceed to step S211.

[0093] S210; Determine the exhaust compensation value as the second compensation value, and use the sum of the current exhaust temperature and the second compensation value as the compensated exhaust temperature; Determine the frequency reduction value as the second frequency reduction value, and use the difference between the highest operating frequency and the second frequency reduction value as the highest target frequency;

[0094] S211 Determine whether the outdoor ambient temperature is greater than the third temperature threshold; if yes, proceed to step S212; if no, continue to step S201.

[0095] S212 determines the exhaust compensation value as the third compensation value, and uses the sum of the current exhaust temperature and the third compensation value as the compensated exhaust temperature; it also determines the frequency reduction value as the third frequency reduction value, and uses the difference between the highest operating frequency and the third frequency reduction value as the highest target frequency.

[0096] S213 determines whether to enter frequency limiting mode based on the compensated exhaust temperature and the highest target frequency.

[0097] Figure 3 This is a flowchart illustrating a first method for determining whether the outdoor unit is properly ventilating, according to an embodiment of the present invention. Figure 3 As shown, the method includes:

[0098] The air conditioner is turned on.

[0099] S302 controls the air conditioner to enter the single outdoor fan operation mode, and the outdoor fan runs at the first preset speed, the second preset speed and the third preset speed respectively.

[0100] S304 obtains the first unit power of the air conditioner at the first preset speed, the second unit power of the air conditioner at the second preset speed, and the third unit power of the air conditioner at the third preset speed.

[0101] S306 determines whether the power difference between the first total power and the first power threshold is greater than or equal to the power difference threshold, whether the power difference between the second total power and the second power threshold is greater than or equal to the power difference threshold, and whether the power difference between the third total power and the third power threshold is greater than or equal to the power difference threshold; if yes, then proceed to step S308; if no, then proceed to step S310.

[0102] S308 indicates that the outdoor unit is experiencing poor airflow.

[0103] The S310 controls the air conditioner to enter cooling mode.

[0104] Figure 4 This is a flowchart illustrating a second method for determining whether the outdoor unit is properly ventilating, according to an embodiment of the present invention. Figure 4 As shown, the method includes:

[0105] The air conditioner is turned on.

[0106] S402 controls the air conditioner to enter cooling mode.

[0107] S404 acquires the initial external surface temperature and initial outdoor ambient temperature of the air conditioner, as well as the operating external surface temperature and operating outdoor ambient temperature after the air conditioner has been running for a second preset time.

[0108] S406 determines whether the temperature difference between the initial outer disk temperature and the initial outdoor ambient temperature is less than or equal to the first temperature difference threshold, whether the temperature difference between the running outer disk temperature and the initial outer disk temperature is greater than or equal to the second temperature difference threshold, and whether the temperature difference between the running outdoor ambient temperature and the initial outdoor ambient temperature is greater than or equal to the third temperature difference threshold; if yes, proceed to step S408; if no, continue to step S402.

[0109] S408 indicates that the outdoor unit is experiencing poor airflow.

[0110] Figure 5 This is a schematic diagram of the structure of a control device according to an embodiment of the present invention. Figure 5 As shown, the control device includes:

[0111] The acquisition module 51 is used to acquire the outdoor ambient temperature and the current exhaust temperature of the compressor.

[0112] The judgment module 52 determines whether to enter the high-temperature cooling mode based on the outdoor ambient temperature, and also determines whether the outdoor unit is unobstructed in terms of airflow.

[0113] The control module 53 performs temperature compensation on the current exhaust temperature based on the outdoor ambient temperature to obtain a compensated exhaust temperature, and determines whether to enter the frequency reduction mode based on the compensated exhaust temperature.

[0114] This control device can execute the aforementioned high-temperature cooling control method for air conditioners, allowing the air conditioner's maximum operating frequency to be higher than the existing maximum operating frequency setting. It judges the heat exchange effect of the outdoor unit and the cooling effect of the air conditioner by whether the outdoor unit has unobstructed airflow. In high-temperature cooling mode, when the outdoor unit's airflow is obstructed, it compensates for the current exhaust temperature based on the outdoor ambient temperature, so that the air conditioner is controlled to enter a frequency-limiting mode before the compressor's actual operating frequency reaches its maximum. This effectively protects the compressor from increasing its operating frequency when the outdoor unit's heat exchange effect is poor. When the outdoor unit's airflow is unobstructed, it controls whether the air conditioner enters a frequency-limiting mode based on the compressor's actual current exhaust temperature, ensuring the compressor's actual operating frequency reaches its maximum before entering the frequency-limiting mode. This allows the compressor to operate at a higher frequency even when the outdoor ambient temperature is high but the outdoor unit's heat exchange effect is good, enabling the air conditioner to operate normally and effectively regulate the indoor environment, thus improving the air conditioner's cooling function and the user experience.

[0115] Optionally, this embodiment also provides an air conditioner, including a computer-readable storage medium storing a computer program and a controller. The computer program is read and executed by the controller to implement the above-described high-temperature cooling control method for the air conditioner. This air conditioner is capable of executing the above-described high-temperature cooling control method and possesses all the beneficial effects of the high-temperature cooling control method, which will not be elaborated further here.

[0116] Optionally, this embodiment also provides a computer-readable storage medium storing a computer program. When the computer program is read and executed by the controller, it implements the above-described high-temperature cooling control method for an air conditioner. This computer-readable storage medium can execute the above-described high-temperature cooling control method for an air conditioner and possesses all the beneficial effects of this method, which will not be elaborated further here.

[0117] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0118] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for controlling high-temperature cooling in an air conditioner, characterized in that, The method is applied to an air conditioner, wherein the air conditioner is configured with a maximum operating frequency and a corresponding maximum discharge temperature for the compressor in a high-temperature cooling mode; the method includes: Obtain the outdoor ambient temperature and determine whether to enter the high-temperature cooling mode based on the outdoor ambient temperature; Determine if the outdoor unit is discharging air smoothly; If the air conditioner enters the high-temperature cooling mode and the outdoor unit's airflow is obstructed, the current exhaust temperature of the compressor is obtained, and the current exhaust temperature is compensated by increasing the temperature based on the outdoor ambient temperature to obtain a compensated exhaust temperature. Based on the compensated exhaust temperature, it is determined whether to enter the frequency reduction mode. If the air conditioner enters the high-temperature cooling mode and the outdoor unit has unobstructed airflow, the current exhaust temperature of the compressor is obtained and compared with the highest exhaust temperature. When the current exhaust temperature is greater than or equal to the highest exhaust temperature, the air conditioner is controlled to enter the frequency reduction mode.

2. The method according to claim 1, characterized in that, After obtaining the current exhaust temperature of the compressor, the method further includes: reducing the highest operating frequency of the air conditioner to the highest target frequency based on the outdoor ambient temperature.

3. The method according to claim 2, characterized in that, The step of reducing the air conditioner's highest operating frequency to the highest target frequency based on the outdoor ambient temperature includes: If the outdoor ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, then the frequency reduction value is determined to be the first frequency reduction value, and the difference between the highest operating frequency and the first frequency reduction value is taken as the highest target frequency. And / or, if the outdoor ambient temperature is greater than the second temperature threshold and less than or equal to the third temperature threshold, then the frequency reduction value is determined to be the second frequency reduction value, and the difference between the highest operating frequency and the second frequency reduction value is taken as the highest target frequency; And / or, if the outdoor ambient temperature is greater than the third temperature threshold, the frequency reduction value is determined to be the third frequency reduction value, and the difference between the highest operating frequency and the third frequency reduction value is taken as the highest target frequency; Among them, the first temperature threshold, the second temperature threshold and the third temperature threshold increase sequentially, and the first frequency reduction value, the second frequency reduction value and the third frequency reduction value increase sequentially.

4. The method according to claim 1, characterized in that, The step of determining whether to enter the high-temperature cooling mode based on the outdoor ambient temperature includes: Determine whether the outdoor ambient temperature is greater than or equal to a first temperature threshold and whether the duration of the temperature exceeds a first preset duration; If so, then proceed to the high-temperature cooling mode.

5. The method according to claim 1, characterized in that, The step of determining whether the outdoor unit is ventilating smoothly includes: Control the air conditioner to enter single outdoor fan operation mode, and the outdoor fan runs at a preset speed; Obtain the total power of the air conditioner; If the power difference between the total power and the power threshold is greater than or equal to the power difference threshold, then it is determined that the outdoor unit is not properly ventilated.

6. The method according to claim 5, characterized in that, In the single outdoor fan operation mode, the outdoor fan is controlled to operate at a first preset speed, a second preset speed and a third preset speed respectively; The first unit power of the air conditioner at the first preset speed, the second unit power of the air conditioner at the second preset speed, and the third unit power of the air conditioner at the third preset speed are obtained; If the power difference between the first unit power and the first power threshold is greater than or equal to the power difference threshold, the power difference between the second unit power and the second power threshold is greater than or equal to the power difference threshold, and the power difference between the third unit power and the third power threshold is greater than or equal to the power difference threshold, then it is determined that the outdoor unit is not properly ventilated.

7. The method according to claim 6, characterized in that, The first preset speed range is 200 rpm to 400 rpm; The second preset speed range is 500 rpm to 700 rpm; The third preset speed range is 800rpm~1000rpm.

8. The method according to claim 1, characterized in that, The step of determining whether the outdoor unit is ventilating smoothly includes: Control the air conditioner to enter cooling mode; The initial external temperature and initial outdoor ambient temperature of the air conditioner are obtained, as well as the operating external temperature and operating outdoor ambient temperature after the air conditioner has been running for a second preset time. If the temperature difference between the initial outdoor unit temperature and the initial outdoor ambient temperature is less than or equal to a first temperature difference threshold, the temperature difference between the operating outdoor unit temperature and the initial outdoor unit temperature is greater than or equal to a second temperature difference threshold, and the temperature difference between the operating outdoor ambient temperature and the initial outdoor ambient temperature is greater than or equal to a third temperature difference threshold, then it is determined that the outdoor unit's airflow is obstructed.

9. The method according to claim 1, characterized in that, The step of compensating the exhaust temperature by increasing the current exhaust temperature based on the outdoor ambient temperature includes: If the outdoor ambient temperature is greater than or equal to the first temperature threshold and less than or equal to the second temperature threshold, then the exhaust compensation value is determined to be the first compensation value, and the sum of the current exhaust temperature and the first compensation value is taken as the compensated exhaust temperature. And / or, if the outdoor ambient temperature is greater than the second temperature threshold and less than or equal to the third temperature threshold, then the exhaust compensation value is determined to be the second compensation value, and the sum of the current exhaust temperature and the second compensation value is taken as the compensated exhaust temperature; And / or, if the outdoor ambient temperature is greater than the third temperature threshold, the exhaust compensation value is determined to be the third compensation value, and the sum of the current exhaust temperature and the third compensation value is taken as the compensated exhaust temperature; The first temperature threshold, the second temperature threshold, and the third temperature threshold increase sequentially, as do the first compensation value, the second compensation value, and the third compensation value.

10. A control device, characterized in that, The control device is capable of performing the high-temperature cooling control method for an air conditioner according to any one of claims 1-9, and the control device comprises: The acquisition module is used to acquire the outdoor ambient temperature and the current exhaust temperature of the compressor; The judgment module determines whether to enter the high-temperature cooling mode based on the outdoor ambient temperature, and also determines whether the outdoor unit is unobstructed in terms of airflow. The control module, if the air conditioner enters the high-temperature cooling mode and the outdoor unit's airflow is obstructed, performs a temperature compensation operation on the current exhaust temperature based on the outdoor ambient temperature to obtain a compensated exhaust temperature, and determines whether to enter the frequency reduction mode based on the compensated exhaust temperature; if the air conditioner enters the high-temperature cooling mode and the outdoor unit's airflow is unobstructed, compares the current exhaust temperature with the highest exhaust temperature, and controls the air conditioner to enter the frequency reduction mode when the current exhaust temperature is greater than or equal to the highest exhaust temperature.

11. An air conditioner, characterized in that, The method includes a computer-readable storage medium storing a computer program and a controller, wherein the computer program is read and executed by the controller to implement the high-temperature cooling control method for an air conditioner as described in any one of claims 1-9.

12. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program, which is read and executed by the controller to implement the high-temperature cooling control method for an air conditioner as described in any one of claims 1-9.

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