Protection temperature correction method and device, medium and air conditioner

Abstract

The invention discloses a protection temperature correction method and device, a medium and an air conditioner. When the target abnormal condition that the temperature of an outdoor coil pipe is reduced along with increase of the frequency of a compressor is monitored, the current operation frequency of the compressor is obtained firstly, and then a corresponding first temperature correction value is determined according to the frequency; and finally, the initial protection temperature of the outdoor coil pipe is corrected by adopting the correction value, and a first target protection temperature which is negatively correlated with the current operation frequency is obtained. According to the scheme, the protection temperature is dynamically reduced on the basis of the operation frequency of the compressor, the protection threshold value under the high-frequency working condition is matched with the reduced actual temperature of the coil pipe, it is ensured that protection logic is effectively triggered, and overload damage to equipment due to no protection is avoided.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to a protective temperature correction method, device, medium, and air conditioner. Background Technology

[0002] The temperature sensor for the outdoor coil of an air conditioner is usually located near the condenser outlet. For air conditioning systems with a small number of flow paths, when the compressor operates at high frequency, the refrigerant flow rate increases, and the system pressure drop increases accordingly. In addition, since the temperature sensor is installed in the later stage of the refrigerant flow, the outdoor coil temperature may decrease as the compressor frequency increases.

[0003] This situation will cause the outdoor coil temperature to remain below the protection threshold when the compressor is running at high frequency, thus preventing the outdoor coil protection logic from being effectively triggered. Summary of the Invention

[0004] Therefore, it is necessary to provide a protection temperature correction method, device, medium, and air conditioner to solve the problem that in the existing technology, when the outdoor coil temperature decreases as the compressor frequency increases, the collected outdoor coil temperature is always lower than the protection threshold, which leads to the outdoor coil protection logic not being effectively triggered.

[0005] In a first aspect, embodiments of this application provide a protection temperature correction method, the method comprising: When a target abnormal condition is detected, the current operating frequency of the compressor is obtained; wherein, the target abnormal condition indicates that the outdoor coil temperature decreases as the compressor frequency increases; Based on the current operating frequency, determine the first temperature correction value; The initial protection temperature of the outdoor coil is adjusted downward based on the first temperature correction value to obtain the first target protection temperature; wherein, the first target protection temperature is negatively correlated with the current operating frequency.

[0006] In some embodiments of this application, before obtaining the current operating frequency of the compressor, the method further includes: When the rate of change of the monitored compressor current is greater than 0 and the rate of change of the outdoor coil temperature is less than 0, an abnormal situation is determined to be triggered; and / or, When the rate of change of the compressor's exhaust temperature is greater than 0 and the rate of change of the outdoor coil temperature is less than 0, the target abnormal situation is determined to be triggered.

[0007] In some embodiments of this application, determining the first temperature correction value based on the current operating frequency includes: Obtain a first mapping relationship under the current outdoor ambient temperature; wherein, the first mapping relationship is used to indicate the temperature correction value corresponding to different operating frequencies of the compressor; The temperature correction value corresponding to the current operating frequency in the first mapping relationship is determined as the first temperature correction value.

[0008] In some embodiments of this application, the step of adjusting the initial protection temperature of the outdoor coil temperature based on the first temperature correction value to obtain the first target protection temperature includes: When the first temperature correction value is the temperature difference, the initial protection temperature is subtracted from the first temperature correction value to obtain the first target protection temperature; wherein the temperature difference value is a positive number; or, When the first temperature correction value is a temperature coefficient, the initial protection temperature is multiplied by the first temperature correction value to obtain the first target protection temperature; wherein the temperature coefficient is a coefficient between 0 and 1.

[0009] In some embodiments of this application, after adjusting the initial protection temperature of the outdoor coil temperature based on the first temperature correction value to obtain the first target protection temperature, the method further includes: When the current outdoor temperature is detected to be higher than the temperature threshold, a second temperature correction value is determined based on the current outdoor ambient temperature. The first target protection temperature is adjusted downward based on the second temperature correction value to obtain the second target protection temperature; wherein the second target protection temperature is negatively correlated with the current outdoor temperature.

[0010] In some embodiments of this application, determining the second temperature correction value based on the current outdoor ambient temperature includes: Obtain the second mapping relationship under the current operating frequency; wherein, the second mapping relationship is used to indicate the temperature correction value corresponding to different outdoor ambient temperatures; The temperature correction value corresponding to the current outdoor ambient temperature in the second mapping relationship is determined as the second temperature correction value.

[0011] In some embodiments of this application, the step of adjusting the first target protection temperature downward based on the second temperature correction value to obtain the second target protection temperature includes: When the second temperature correction value is the temperature difference, the first target protection temperature is subtracted from the second temperature correction value to obtain the second target protection temperature; wherein the temperature difference is a positive number; or, When the second temperature correction value is a temperature coefficient, the first target protection temperature is multiplied by the second temperature correction value to obtain the second target protection temperature; wherein, the temperature coefficient is a coefficient between 0 and 1.

[0012] In some embodiments of this application, the first temperature correction value is determined by the current operating frequency based on a first mapping relationship, and the second temperature correction value is determined by the current outdoor ambient temperature based on a second mapping relationship; The methods for determining the first mapping relationship and the second mapping relationship include: Under the first test condition, the outdoor coil temperature and condenser pressure of the compressor are acquired at the test operating frequency; wherein, the first test condition triggers the target abnormal situation and is under the test outdoor ambient temperature. The temperature corresponding to the condenser pressure and the outdoor coil temperature are calculated to obtain the temperature correction value corresponding to the test operation frequency. The first mapping relationship under the outdoor ambient temperature of the test is determined based on the temperature correction value corresponding to all test operation frequencies. Under the second test condition, the outdoor coil temperature and condenser pressure of the compressor are obtained at the test outdoor temperature; wherein, the second test condition triggers the target abnormal situation and is within the test operating frequency; The temperature corresponding to the condenser pressure and the outdoor coil temperature are calculated to obtain the temperature correction value corresponding to the test outdoor temperature. The second mapping relationship under the test operation frequency is determined based on the temperature correction values ​​corresponding to all outdoor test temperatures.

[0013] Secondly, embodiments of this application also provide a protective temperature correction device, the protective temperature correction device comprising: The acquisition module is used to acquire the current operating frequency of the compressor when a target abnormal condition is detected; wherein the target abnormal condition indicates that the outdoor coil temperature decreases as the compressor frequency increases. The determining module is used to determine a first temperature correction value based on the current operating frequency; The correction module is used to correct the initial protection temperature of the outdoor coil temperature based on the first temperature correction value to obtain a first target protection temperature; wherein the first target protection temperature is negatively correlated with the current operating frequency.

[0014] Thirdly, embodiments of this application also provide an air conditioner, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the computer program is executed by the processor, it implements the steps in the above-described protective temperature correction method.

[0015] Fourthly, embodiments of this application also provide a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps in the above-described protective temperature correction method.

[0016] Fifthly, embodiments of this application also provide a computer program product or computer program, which includes computer instructions stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium and executes the computer instructions, causing the computer device to perform the methods provided in the various optional implementations described in embodiments of this application.

[0017] This invention provides a protection temperature correction method, device, medium, and air conditioner. When an abnormal situation is detected where the outdoor coil temperature decreases as the compressor frequency increases, the current operating frequency of the compressor is first obtained. Then, a corresponding first temperature correction value is determined based on this frequency. Finally, this correction value is used to lower the initial protection temperature of the outdoor coil, resulting in a first target protection temperature that is negatively correlated with the current operating frequency. This solution dynamically lowers the protection temperature based on the compressor operating frequency, ensuring that the protection threshold under high-frequency operating conditions is adapted to the reduced actual coil temperature. This guarantees that the protection logic is effectively triggered, preventing overload damage to the equipment due to lack of protection. Attached Figure Description

[0018] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] in: Figure 1 A schematic flowchart illustrating the protection temperature correction method provided in the first embodiment of this application; Figure 2 A schematic flowchart illustrating the protection temperature correction method provided in the second embodiment of this application; Figure 3 A schematic diagram of the structure of the temperature correction device for protection; Figure 4 This is a structural block diagram of an air conditioner. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to these processes, methods, products, or apparatuses.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] This invention provides a protective temperature correction method, apparatus, medium, and air conditioner. In some embodiments of this application, the provided protective temperature correction method can be applied to an air conditioner. Specifically, the air conditioner can be applied to different scenarios, including but not limited to industrial air conditioners or household air conditioners. In some embodiments of this application, the air conditioner can be a single unit, such as a cabinet air conditioner or a wall-mounted air conditioner; in some embodiments of this application, the air conditioner can also be a central air conditioning system composed of multiple air conditioner units, such as a multi-split air conditioner, an air-cooled heat pump system, or an air conditioning system with heat recovery function.

[0024] Please see Figure 1 , Figure 1 This is a flowchart illustrating the protective temperature correction method provided in the first embodiment of this application. Although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown in the figures. Specifically, the specific flow of the protective temperature correction method provided in the first embodiment of this application is as follows: S101: When an abnormal situation is detected that triggers the target, the current operating frequency of the compressor is obtained.

[0025] Among them, the target abnormal condition indicates that the outdoor coil temperature decreases as the compressor frequency increases.

[0026] In some embodiments of this application, before obtaining the current operating frequency of the compressor in S101, the following steps are further performed: when the monitored rate of change of the compressor current is greater than 0 and the rate of change of the outdoor coil temperature is less than 0, a target abnormal condition is determined to be triggered. And / or, when the monitored rate of change of the compressor exhaust temperature is greater than 0 and the rate of change of the outdoor coil temperature is less than 0, a target abnormal condition is determined to be triggered.

[0027] Understandably, the rate of change of current reflects the change in the compressor's operating load. When the rate of change of current is greater than 0, it means that the compressor's input power has increased. Similarly, when the rate of change of exhaust temperature is greater than 0, it also means that the compressor's input power has increased. Under normal operating conditions, an increase in compressor frequency will accelerate the refrigerant circulation speed and improve heat exchange efficiency, and the outdoor coil temperature should increase accordingly (rate of change > 0). However, when the rate of change is less than 0, it means that the coil temperature is decreasing instead, which contradicts the normal trend of increasing frequency. This triggers the target abnormal situation. This abnormality will cause the outdoor coil temperature to remain below the initial protection threshold when the compressor is running at high frequency, making it impossible for the outdoor coil protection logic to be effectively triggered. This may lead to system damage due to actual overload (such as excessive refrigerant flow rate or excessive pressure drop). Therefore, it is necessary to obtain the compressor's current operating frequency and then adjust the protection threshold through subsequent temperature correction to ensure that the protection logic can respond in a timely manner.

[0028] S102, determine the first temperature correction value based on the current operating frequency.

[0029] The first temperature correction value refers to the correction value used to adjust the initial protection temperature of the outdoor coil. The first temperature correction value can be the temperature difference associated with the current operating frequency, the temperature coefficient associated with the current operating frequency, or other forms, which are not limited here.

[0030] In some embodiments of this application, S102, determining the first temperature correction value based on the current operating frequency, specifically includes the following steps: obtaining a first mapping relationship under the current outdoor ambient temperature; and determining the temperature correction value corresponding to the current operating frequency in the first mapping relationship as the first temperature correction value.

[0031] The first mapping relationship is used to indicate the temperature correction value corresponding to different operating frequencies of the compressor. The first mapping relationship can be in the form of an interval table, a mapping function, or other forms, which are not limited here.

[0032] For example, the first mapping relationship is in the form of an interval table. Assuming the current outdoor ambient temperature is 36℃, the specific form of the first mapping relationship under the current outdoor ambient temperature is as follows:

[0033] If the compressor is currently operating at a frequency of 75Hz (which falls within the range of 60Hz≤F<80Hz), then the corresponding correction value of 6℃ is directly obtained from this mapping relationship, i.e., the first temperature correction value is 6℃.

[0034] Alternatively, the first mapping relationship can be in the form of a mapping function. For example, if the current outdoor temperature is 30℃, the first mapping relationship under this temperature is a preset function: .in, This is the first temperature correction value, where F is the compressor operating frequency. It takes effect when F ≥ 30Hz; otherwise, it does not. =0℃. If the compressor's current operating frequency is 55Hz, substituting into the function yields: =0.12×(55-30)=0.12×25=3℃, so the first temperature correction value is 3℃. Of course, other forms are also possible, and are not limited here.

[0035] S103, the initial protection temperature of the outdoor coil is adjusted downward based on the first temperature correction value to obtain the first target protection temperature.

[0036] The initial protection temperature refers to the outdoor coil protection trigger temperature threshold set by default in the air conditioning system without correction; the first target protection temperature refers to the outdoor coil protection trigger temperature threshold obtained after being corrected down by the first temperature correction value, and the first target protection temperature is negatively correlated with the current operating frequency.

[0037] In some embodiments of this application, step S103, which involves adjusting the initial protection temperature of the outdoor coil based on a first temperature correction value to obtain a first target protection temperature, specifically includes the following steps: when the first temperature correction value is a temperature difference, subtracting the first temperature correction value from the initial protection temperature to obtain the first target protection temperature; or, when the first temperature correction value is a temperature coefficient, multiplying the initial protection temperature by the first temperature correction value to obtain the first target protection temperature.

[0038] The temperature difference is a positive number. The temperature coefficient is a coefficient between 0 and 1.

[0039] For example, assuming the initial protection temperature is 65℃ and the first temperature correction value is 7℃, the first target protection temperature after the correction is 58℃. Alternatively, assuming the initial protection temperature is 62℃ and the first temperature correction value is 0.88, the first target protection temperature after the correction is 54.56℃ (in practical applications, the temperature can be rounded up as needed).

[0040] Understandably, regarding the anomaly of "outdoor coil temperature decreasing when compressor frequency increases," the initial protection temperature no longer matches the actual operating conditions. It needs to be adjusted downwards to adapt to the real state. This includes subtracting the difference from the initial protection temperature if the first temperature correction value is a positive number, and multiplying the initial protection temperature by the coefficient if it's a coefficient between 0 and 1. Both methods lower the protection trigger threshold, allowing the outdoor coil protection logic to be triggered. Furthermore, the higher the operating frequency, the faster the refrigerant flow rate, the greater the system pressure drop, and the more significant the deviation between the outdoor coil temperature and the actual heat exchange load (lower temperature). The difference between the initial protection temperature and the actual safety threshold also increases. Therefore, the downward adjustment range corresponding to the correction value needs to be increased accordingly, ultimately making the first target protection temperature negatively correlated with the frequency. This ensures that the protection logic can be triggered promptly during high-frequency operation, avoiding protection failure due to temperature misjudgment.

[0041] In the above embodiment, when an abnormal situation is detected where the outdoor coil temperature decreases as the compressor frequency increases, the current operating frequency of the compressor is first obtained. Then, a corresponding first temperature correction value is determined based on this frequency. Finally, this correction value is used to lower the initial protection temperature of the outdoor coil, resulting in a first target protection temperature that is negatively correlated with the current operating frequency. This solution dynamically lowers the protection temperature based on the compressor operating frequency, ensuring that the protection threshold under high-frequency operating conditions is adapted to the reduced actual coil temperature. This guarantees that the protection logic is effectively triggered and prevents overload damage to the equipment due to lack of protection.

[0042] Please see Figure 2 , Figure 2 This is a flowchart illustrating the protection temperature correction method provided in the second embodiment of this application. Although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than that shown in the figures. Specifically, the specific flow of the protection temperature correction method provided in the second embodiment of this application is as follows: S201: When an abnormal situation is detected that triggers the target, the current operating frequency of the compressor is obtained.

[0043] S202, determine the first temperature correction value based on the current operating frequency.

[0044] S203, the initial protection temperature of the outdoor coil is adjusted downward based on the first temperature correction value to obtain the first target protection temperature.

[0045] In some embodiments of this application, the principles of S201-S203 are basically the same as those of S101-S103 in the protection temperature correction method provided in the first embodiment, so they will not be described again.

[0046] S204, when the current outdoor temperature is detected to be greater than the temperature threshold, a second temperature correction value is determined based on the current outdoor ambient temperature.

[0047] Among them, the correction value determined based on the outdoor ambient temperature is used to make a second downward adjustment to the first target protection temperature. The second temperature correction value can be a temperature difference associated with the current outdoor temperature, or it can be associated with the current outdoor temperature, or it can be in other forms, which are not limited here.

[0048] In some embodiments of this application, step S204, determining the second temperature correction value based on the current outdoor ambient temperature, specifically includes the following steps: obtaining a second mapping relationship at the current operating frequency; and determining the temperature correction value corresponding to the current outdoor ambient temperature in the second mapping relationship as the second temperature correction value.

[0049] The second mapping relationship is used to indicate the temperature correction value corresponding to different outdoor ambient temperatures. The second mapping relationship can be in the form of an interval table, a mapping function, or other forms, which are not limited here.

[0050] For example, the second mapping relationship is in the form of an interval table. Assuming the current compressor operating frequency is 70Hz, the specific form of the second mapping relationship at this compressor operating frequency is as follows:

[0051] If the current outdoor ambient temperature is 38℃ (which falls within the range of 35℃≤T<40℃), then the corresponding coefficient 0.85 is obtained from this mapping relationship, which is the second temperature correction value of 0.85.

[0052] Alternatively, the second mapping relationship can be in the form of a mapping function. Assuming the current compressor operating frequency is 65Hz, the second mapping relationship at this current compressor operating frequency is a preset function: =1-0.005×(T-25) (where This is the second temperature correction value, where T is the outdoor ambient temperature. It takes effect when T ≥ 25℃; when T < 25℃, =1. If the current outdoor temperature is 36℃, substitute it into the function to calculate: =1-0.005×(36-25)=1-0.055=0.945, that is, the second temperature correction value is 0.945 (the actual accuracy can be adjusted as needed).

[0053] S205, the first target protection temperature is adjusted downward based on the second temperature correction value to obtain the second target protection temperature.

[0054] The second target protection temperature refers to the final outdoor coil protection trigger temperature threshold obtained by adjusting the first target protection temperature using the second temperature correction value, and the second target protection temperature is negatively correlated with the current outdoor temperature.

[0055] In some embodiments of this application, step S205, which involves adjusting the first target protection temperature based on a second temperature correction value to obtain a second target protection temperature, specifically includes the following steps: when the second temperature correction value is a temperature difference, subtracting the second temperature correction value from the first target protection temperature to obtain the second target protection temperature; or, when the second temperature correction value is a temperature coefficient, multiplying the first target protection temperature by the second temperature correction value to obtain the second target protection temperature.

[0056] The temperature difference is a positive number. The temperature coefficient is a coefficient between 0 and 1.

[0057] For example, assuming the first target protection temperature is 58℃ and the second temperature correction value is 5℃, the second target protection temperature after the correction is 53℃. Alternatively, assuming the first target protection temperature is 54.56℃ and the second temperature correction value is 0.92, the second target protection temperature after the correction is 50.2℃ (in practical applications, the temperature can be rounded up as needed).

[0058] Understandably, the higher the operating temperature, the greater the difficulty of heat dissipation for the air conditioner, leading to a corresponding increase in the overall system heat exchange load. This significantly raises the condensation pressure and temperature of the refrigerant in the condenser, greatly increasing the potential risk of system pressure overshoot. Simultaneously, the external coil temperature detected by the temperature sensor under high-temperature conditions is inherently lower due to the abnormal "temperature drop with increasing frequency" phenomenon. Furthermore, the higher the outdoor temperature, the more pronounced the deviation between this detected temperature and the system's actual safety threshold. If the protection temperature is not adjusted accordingly, it will result in delayed external coil temperature protection, further exacerbating the risk of system pressure overshoot. Therefore, the first target protection temperature needs to be further adjusted downwards based on the second temperature correction value. This includes subtracting the difference from the first target protection temperature when the second temperature correction value is a positive difference, and multiplying the first target protection temperature by the coefficient when the second temperature correction value is a temperature coefficient between 0 and 1. Both methods can lower the protection trigger threshold, ensuring that the protection logic can be triggered promptly under high-temperature conditions and effectively avoiding the risk of equipment overload damage.

[0059] In some embodiments of this application, the first temperature correction value is determined based on a first mapping relationship using the current operating frequency, and the second temperature correction value is determined based on a second mapping relationship using the current outdoor ambient temperature. The determination of the first and second mapping relationships specifically includes the following steps: Under the first test condition, the outdoor coil temperature and condenser pressure of the compressor are acquired at the test operating frequency. The temperature corresponding to the condenser pressure and the outdoor coil temperature are calculated to obtain the temperature correction value corresponding to the test operating frequency. Based on the temperature correction values ​​corresponding to all test operating frequencies, a first mapping relationship is determined under the test outdoor ambient temperature.

[0060] Under the second test condition, the outdoor coil temperature and condenser pressure of the compressor are acquired at the test outdoor temperature. The temperature corresponding to the condenser pressure and the outdoor coil temperature are calculated to obtain the temperature correction value corresponding to the test outdoor temperature. Based on the temperature correction values ​​corresponding to all test outdoor temperatures, a second mapping relationship is determined for the test operating frequency.

[0061] The first test condition triggers the target abnormality under the test outdoor ambient temperature. The second test condition triggers the target abnormality under the test operating frequency. The test operating frequency refers to the compressor operating frequency parameter preset for calibrating the mapping relationship in both the first and second test conditions. The test outdoor ambient temperature refers to the outdoor ambient temperature parameter preset for calibrating the mapping relationship in both the first and second test conditions. The temperature corresponding to the condenser pressure refers to the saturation temperature calculated based on the condenser pressure value collected under the test conditions and combined with the pressure-temperature characteristic curve of the refrigerant.

[0062] For example, under the first test condition (triggering the target abnormal situation and fixing the outdoor ambient temperature at 35℃), for the four preset test operating frequencies of 40Hz, 60Hz, 80Hz, and 100Hz, the outdoor coil temperature and condenser pressure of the compressor under the corresponding operating conditions are collected respectively. The saturation temperature corresponding to the condenser pressure is calculated by combining the pressure-temperature characteristic curve of R410A refrigerant. The temperature correction value corresponding to each test operating frequency is calculated by the difference method of "saturation temperature - outdoor coil temperature". Finally, based on these correction values, the first mapping relationship under the ambient temperature of 35℃ is established by fitting calculation, and the correspondence between different compressor operating frequency ranges and the first temperature correction value is clarified.

[0063] Under the second test condition (triggering a target abnormal situation and fixing the test operation frequency to 70Hz), for four preset outdoor ambient temperatures of 30℃, 35℃, 40℃, and 45℃, the corresponding outdoor coil temperature and condenser pressure were collected. The saturation temperature was calculated based on the pressure-temperature characteristic curve of R410A refrigerant. The temperature correction value corresponding to each outdoor temperature was calculated by the ratio method of "outdoor coil temperature / saturation temperature". Then, based on these correction values, a second mapping relationship under the 70Hz operating frequency was established by fitting calculation to determine the correspondence between different outdoor ambient temperature ranges and the second temperature correction value.

[0064] To facilitate better implementation of the protective temperature correction method of this application, this application also provides a protective temperature correction device based on the above-described protective temperature correction method. The meanings of the terms used are the same as in the above-described protective temperature correction method, and specific implementation details can be found in the description of the method embodiments.

[0065] Please see Figure 3 , Figure 3 This is a schematic diagram of the protective temperature correction device provided in the embodiments of this application, which may specifically include: The acquisition module 301 is used to acquire the current operating frequency of the compressor when a target abnormal condition is detected; wherein the target abnormal condition indicates that the outdoor coil temperature decreases as the compressor frequency increases. The determining module 302 is used to determine a first temperature correction value based on the current operating frequency; The correction module 303 is used to correct the initial protection temperature of the outdoor coil temperature based on the first temperature correction value to obtain a first target protection temperature; wherein the first target protection temperature is negatively correlated with the current operating frequency.

[0066] In the above embodiment, the acquisition module 301 is used to first acquire the current operating frequency of the compressor when an abnormal situation is detected where the outdoor coil temperature decreases as the compressor frequency increases. The determination module 302 is used to determine the corresponding first temperature correction value based on this frequency. The correction module 303 is used to finally use this correction value to lower the initial protection temperature of the outdoor coil, resulting in a first target protection temperature that is negatively correlated with the current operating frequency. This solution dynamically lowers the protection temperature based on the compressor operating frequency, ensuring that the protection threshold under high-frequency operating conditions is adapted to the reduced actual coil temperature, thus ensuring that the protection logic is effectively triggered and preventing overload damage to the equipment due to lack of protection.

[0067] In some embodiments of this application, before the acquisition module 301 acquires the current operating frequency of the compressor, it is further configured to: When the rate of change of the monitored compressor current is greater than 0 and the rate of change of the outdoor coil temperature is less than 0, an abnormal situation is determined to be triggered; and / or, When the rate of change of the compressor's exhaust temperature is greater than 0 and the rate of change of the outdoor coil temperature is less than 0, the target abnormal situation is determined to be triggered.

[0068] In some embodiments of this application, the determining module 302 determines a first temperature correction value based on the current operating frequency, including: Obtain a first mapping relationship under the current outdoor ambient temperature; wherein, the first mapping relationship is used to indicate the temperature correction value corresponding to different operating frequencies of the compressor; The temperature correction value corresponding to the current operating frequency in the first mapping relationship is determined as the first temperature correction value.

[0069] In some embodiments of this application, the correction module 303 performs a correction process on the initial protection temperature of the outdoor coil based on the first temperature correction value to obtain a first target protection temperature, including: When the first temperature correction value is the temperature difference, the initial protection temperature is subtracted from the first temperature correction value to obtain the first target protection temperature; wherein the temperature difference value is a positive number; or, When the first temperature correction value is a temperature coefficient, the initial protection temperature is multiplied by the first temperature correction value to obtain the first target protection temperature; wherein the temperature coefficient is a coefficient between 0 and 1.

[0070] In some embodiments of this application, after the correction module 303 corrects the initial protection temperature of the outdoor coil temperature based on the first temperature correction value to obtain the first target protection temperature, the protection temperature correction device is further configured to: When the current outdoor temperature is detected to be higher than the temperature threshold, a second temperature correction value is determined based on the current outdoor ambient temperature. The first target protection temperature is adjusted downward based on the second temperature correction value to obtain the second target protection temperature; wherein the second target protection temperature is negatively correlated with the current outdoor temperature.

[0071] In some embodiments of this application, the protective temperature correction device determines a second temperature correction value based on the current outdoor ambient temperature, including: Obtain the second mapping relationship under the current operating frequency; wherein, the second mapping relationship is used to indicate the temperature correction value corresponding to different outdoor ambient temperatures; The temperature correction value corresponding to the current outdoor ambient temperature in the second mapping relationship is determined as the second temperature correction value.

[0072] In some embodiments of this application, the protection temperature correction device performs a downward correction process on the first target protection temperature based on the second temperature correction value to obtain a second target protection temperature, including: When the second temperature correction value is the temperature difference, the first target protection temperature is subtracted from the second temperature correction value to obtain the second target protection temperature; wherein the temperature difference is a positive number; or, When the second temperature correction value is a temperature coefficient, the first target protection temperature is multiplied by the second temperature correction value to obtain the second target protection temperature; wherein, the temperature coefficient is a coefficient between 0 and 1.

[0073] In some embodiments of this application, the first temperature correction value is determined by the current operating frequency based on a first mapping relationship, and the second temperature correction value is determined by the current outdoor ambient temperature based on a second mapping relationship; The methods for determining the first mapping relationship and the second mapping relationship include: Under the first test condition, the outdoor coil temperature and condenser pressure of the compressor are acquired at the test operating frequency; wherein, the first test condition triggers the target abnormal situation and is under the test outdoor ambient temperature. The temperature corresponding to the condenser pressure and the outdoor coil temperature are calculated to obtain the temperature correction value corresponding to the test operation frequency. The first mapping relationship under the outdoor ambient temperature of the test is determined based on the temperature correction value corresponding to all test operation frequencies. Under the second test condition, the outdoor coil temperature and condenser pressure of the compressor are obtained at the test outdoor temperature; wherein, the second test condition triggers the target abnormal situation and is within the test operating frequency; The temperature corresponding to the condenser pressure and the outdoor coil temperature are calculated to obtain the temperature correction value corresponding to the test outdoor temperature. The second mapping relationship under the test operation frequency is determined based on the temperature correction values ​​corresponding to all outdoor test temperatures.

[0074] In addition, this application also provides an air conditioner, such as Figure 4 As shown, it illustrates the structural diagram of the air conditioner involved in this application, specifically: The air conditioner may include components such as a processor 401 with one or more processing cores, a memory 402 with one or more computer-readable storage media, a power supply 403, and an input unit 404. Those skilled in the art will understand that... Figure 4 The air conditioner structure shown does not constitute a limitation on the air conditioner and may include more or fewer components than shown, or combine certain components, or have different component arrangements. Wherein: The processor 401 is the control center of the air conditioner. It connects to various parts of the air conditioner via various interfaces and lines. By running or executing software programs and / or modules stored in the memory 402, and by calling data stored in the memory 402, it performs various functions and processes data, thereby providing overall monitoring of the air conditioner. Optionally, the processor 401 may include one or more processing cores; preferably, the processor 401 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications, and the modem processor mainly handles wireless communication. It is understood that the modem processor may not be integrated into the processor 401.

[0075] The memory 402 can be used to store software programs and modules. The processor 401 executes various functional applications and data processing by running the software programs and modules stored in the memory 402. The memory 402 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function, etc.; the data storage area may store data created based on the use of the air conditioner, etc. In addition, the memory 402 may include high-speed random access memory, and may also include non-volatile memory, such as at least one disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 402 may also include a memory controller to provide the processor 401 with access to the memory 402.

[0076] The air conditioner also includes a power supply 403 that supplies power to the various components. Preferably, the power supply 403 can be logically connected to the processor 401 through a power management system, thereby enabling functions such as charging, discharging, and power consumption management through the power management system. The power supply 403 may also include one or more DC or AC power supplies, recharging systems, power equipment debugging circuits, power converters or inverters, power status indicators, and other arbitrary components.

[0077] The air conditioner may also include an input unit 404, which can be used to receive input digital or character information, and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

[0078] Although not shown, the air conditioner may also include a display unit, etc., which will not be described in detail here. Specifically, in this embodiment, the processor 401 in the air conditioner will load the executable files corresponding to the processes of one or more application programs into the memory 402 according to the following instructions, and the processor 401 will run the application programs stored in the memory 402 to realize the steps in any of the protective temperature correction methods provided in this application embodiment: when a target abnormal situation is detected, the current operating frequency of the compressor is obtained; wherein, the target abnormal situation indicates that the outdoor coil temperature decreases as the compressor frequency increases; a first temperature correction value is determined according to the current operating frequency; the initial protective temperature of the outdoor coil temperature is adjusted downward based on the first temperature correction value to obtain a first target protective temperature; wherein, the first target protective temperature is negatively correlated with the current operating frequency.

[0079] In the above embodiment, when an abnormal situation is detected where the outdoor coil temperature decreases as the compressor frequency increases, the current operating frequency of the compressor is first obtained. Then, a corresponding first temperature correction value is determined based on this frequency. Finally, this correction value is used to lower the initial protection temperature of the outdoor coil, resulting in a first target protection temperature that is negatively correlated with the current operating frequency. This solution dynamically lowers the protection temperature based on the compressor operating frequency, ensuring that the protection threshold under high-frequency operating conditions is adapted to the reduced actual coil temperature. This guarantees that the protection logic is effectively triggered and prevents overload damage to the equipment due to lack of protection.

[0080] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0081] Those skilled in the art will understand that all or part of the steps in the various methods of the above embodiments can be performed by instructions, or by instructions controlling related hardware. These instructions can be stored in a computer-readable storage medium and loaded and executed by a processor.

[0082] Therefore, this application provides a computer-readable storage medium storing a computer program that can be loaded by a processor to perform the steps in any of the protective temperature correction methods provided in this application.

[0083] For details on the implementation of each of the above operations, please refer to the previous examples, which will not be repeated here.

[0084] The computer-readable storage medium may include: read-only memory (ROM), random access memory (RAM), disk or optical disk, etc.

[0085] Since the instructions stored in the computer-readable storage medium can execute the steps of any of the protective temperature correction methods provided in this application, the beneficial effects that any of the protective temperature correction methods provided in this application can achieve can be realized, as detailed in the preceding embodiments, and will not be repeated here.

[0086] The above provides a detailed description of a protective temperature correction method, apparatus, air conditioner, and computer-readable storage medium provided in this application. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, those skilled in the art will recognize that there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for correcting protective temperature, characterized in that, The method includes: When a target abnormal condition is detected, the current operating frequency of the compressor is obtained; wherein, the target abnormal condition indicates that the outdoor coil temperature decreases as the compressor frequency increases; Based on the current operating frequency, determine the first temperature correction value; The initial protection temperature of the outdoor coil is adjusted downward based on the first temperature correction value to obtain the first target protection temperature; wherein, the first target protection temperature is negatively correlated with the current operating frequency.

2. The protective temperature correction method according to claim 1, characterized in that, Before obtaining the current operating frequency of the compressor, the method further includes: When the rate of change of the monitored compressor current is greater than 0 and the rate of change of the outdoor coil temperature is less than 0, an abnormal situation is determined to be triggered; and / or, When the rate of change of the compressor's exhaust temperature is greater than 0 and the rate of change of the outdoor coil temperature is less than 0, the target abnormal situation is determined to be triggered.

3. The protective temperature correction method according to claim 1, characterized in that, Determining the first temperature correction value based on the current operating frequency includes: Obtain a first mapping relationship under the current outdoor ambient temperature; wherein, the first mapping relationship is used to indicate the temperature correction value corresponding to different operating frequencies of the compressor; The temperature correction value corresponding to the current operating frequency in the first mapping relationship is determined as the first temperature correction value.

4. The protective temperature correction method according to claim 1, characterized in that, The step of adjusting the initial protection temperature of the outdoor coil temperature based on the first temperature correction value to obtain the first target protection temperature includes: When the first temperature correction value is the temperature difference, the initial protection temperature is subtracted from the first temperature correction value to obtain the first target protection temperature; wherein the temperature difference value is a positive number; or, When the first temperature correction value is a temperature coefficient, the initial protection temperature is multiplied by the first temperature correction value to obtain the first target protection temperature; wherein the temperature coefficient is a coefficient between 0 and 1.

5. The protective temperature correction method according to claim 1, characterized in that, After adjusting the initial protection temperature of the outdoor coil based on the first temperature correction value to obtain the first target protection temperature, the process further includes: When the current outdoor temperature is detected to be higher than the temperature threshold, a second temperature correction value is determined based on the current outdoor ambient temperature. The first target protection temperature is adjusted downward based on the second temperature correction value to obtain the second target protection temperature; wherein the second target protection temperature is negatively correlated with the current outdoor temperature.

6. The protective temperature correction method according to claim 5, characterized in that, The step of determining the second temperature correction value based on the current outdoor ambient temperature includes: Obtain the second mapping relationship under the current operating frequency; wherein, the second mapping relationship is used to indicate the temperature correction value corresponding to different outdoor ambient temperatures; The temperature correction value corresponding to the current outdoor ambient temperature in the second mapping relationship is determined as the second temperature correction value.

7. The protective temperature correction method according to claim 5, characterized in that, The step of adjusting the first target protection temperature downward based on the second temperature correction value to obtain the second target protection temperature includes: When the second temperature correction value is the temperature difference, the first target protection temperature is subtracted from the second temperature correction value to obtain the second target protection temperature; wherein the temperature difference is a positive number; or, When the second temperature correction value is a temperature coefficient, the first target protection temperature is multiplied by the second temperature correction value to obtain the second target protection temperature; wherein, the temperature coefficient is a coefficient between 0 and 1.

8. The protective temperature correction method according to claim 5, characterized in that, The first temperature correction value is determined based on the first mapping relationship of the current operating frequency, and the second temperature correction value is determined based on the second mapping relationship of the current outdoor ambient temperature. The methods for determining the first mapping relationship and the second mapping relationship include: Under the first test condition, the outdoor coil temperature and condenser pressure of the compressor are acquired at the test operating frequency; wherein, the first test condition triggers the target abnormal situation and is under the test outdoor ambient temperature. The temperature corresponding to the condenser pressure and the outdoor coil temperature are calculated to obtain the temperature correction value corresponding to the test operation frequency. The first mapping relationship under the outdoor ambient temperature of the test is determined based on the temperature correction value corresponding to all test operation frequencies. Under the second test condition, the outdoor coil temperature and condenser pressure of the compressor are obtained at the test outdoor temperature; wherein, the second test condition triggers the target abnormal situation and is within the test operating frequency; The temperature corresponding to the condenser pressure and the outdoor coil temperature are calculated to obtain the temperature correction value corresponding to the test outdoor temperature. The second mapping relationship under the test operation frequency is determined based on the temperature correction values ​​corresponding to all outdoor test temperatures.

9. A protective temperature correction device, characterized in that, The protective temperature correction device includes: The acquisition module is used to acquire the current operating frequency of the compressor when a target abnormal condition is detected; wherein the target abnormal condition indicates that the outdoor coil temperature decreases as the compressor frequency increases. The determining module is used to determine a first temperature correction value based on the current operating frequency; The correction module is used to correct the initial protection temperature of the outdoor coil temperature based on the first temperature correction value to obtain a first target protection temperature; wherein the first target protection temperature is negatively correlated with the current operating frequency.

10. A computer-readable storage medium, characterized in that, The device stores a computer program that, when executed by a processor, causes the processor to perform the steps of the method as described in any one of claims 1 to 8.

11. An air conditioner, characterized in that, It includes a memory and a processor, the memory storing a computer program that, when executed by the processor, causes the processor to perform the steps of the method as described in any one of claims 1 to 8.

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