Air conditioner outdoor unit frosting detection method and device and air conditioner outdoor unit

Abstract

The invention relates to the technical field of intelligent household appliances, and discloses an air conditioner outdoor unit frosting detection method and device and an air conditioner outdoor unit. The method comprises the steps that in response to an air conditioner starting instruction, the temperature of an outdoor coil pipe is collected; processing the temperature of the outdoor coil pipe by utilizing a sliding window mechanism, and calculating a related value of the temperature of the outdoor coil pipe in the sliding window under the condition that the stored data of the sliding window reaches the maximum value; under the condition that the correlation value meets a preset condition, determining to update the reference temperature so as to obtain an updated reference temperature; according to the updated reference temperature, the frosting condition of the air conditioner outdoor unit is determined; wherein the reference temperature is a preset outdoor coil pipe temperature reference value. According to the method, the stability of the outdoor coil temperature is judged through a sliding window mechanism and preset conditions. And the reference temperature is updated under the condition that the air conditioning system is in the running state, so that the dynamic threshold value is obtained. Therefore, interference caused by environment change and outdoor coil pipe temperature fluctuation can be effectively overcome, and the accuracy of frosting detection of the air conditioner outdoor unit is improved.

Description

Technical Field

[0001] The present application relates to the technical field of smart home appliances, for example, to a method and device for detecting frost on an air-conditioning outdoor unit, an air-conditioning outdoor unit, and a computer-readable storage medium. Background Art

[0002] Most air conditioner frost detection methods use fixed temperature thresholds as the criterion for frost formation. However, these thresholds cannot adapt to varying climate conditions, model differences, and operating conditions, and can easily lead to misjudgments. For example, in low-temperature environments, the coil temperature may fall below the preset threshold during normal operation, causing false defrost. Similarly, in high-humidity conditions, the actual temperature may not reach the threshold, resulting in delayed defrost.

[0003] Related art discloses a defrost control method, comprising: in a heating mode, determining whether the air conditioner has performed a defrost operation during the current heating process; if the air conditioner has not performed a defrost operation during the current heating process, determining whether the air conditioner meets a first defrost condition based on the initial temperature, current temperature, and heating operation time of an external coil when the heating mode is started; if the air conditioner has performed a defrost operation during the current heating process, determining whether the air conditioner meets a second defrost condition, the second defrost condition comprising: the heating operation time is not shorter than a third preset time, When the current temperature of the external coil is not higher than the second preset temperature and is lower than the external coil reference temperature by at least a second preset temperature difference, it lasts for a second preset time period; wherein, the external coil reference temperature is the lowest temperature of the external coil within a preset time period after the heating operation, the preset time period is within the third preset time period after the heating operation, the second preset temperature difference tends to decrease with the increase of the heating operation time, and tends to increase with the increase of the external coil reference temperature; when the air conditioner meets either the first defrost condition or the second defrost condition, the air conditioner is controlled to perform a defrost operation.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art: Related technologies set a reference temperature for the external coil to determine if the external coil is frosted. However, as the reference temperature increases over time, it will drift, reducing the accuracy of frosting determination.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0006] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0007] Embodiments of the present disclosure provide a method and apparatus for detecting frost on an air-conditioning outdoor unit, an air-conditioning outdoor unit, and a computer-readable storage medium, so as to improve the accuracy of frost determination on the air-conditioning outdoor unit.

[0008] In some embodiments, the method includes: collecting the outdoor coil temperature in response to an air conditioner start-up instruction; processing the outdoor coil temperature using a sliding window mechanism, and calculating the relevant value of the outdoor coil temperature in the sliding window when the sliding window storage data reaches a maximum value; determining an updated reference temperature to obtain an updated reference temperature when the relevant value meets a preset condition; and determining the frosting condition of the air conditioner outdoor unit based on the updated reference temperature; wherein the reference temperature is a preset outdoor coil temperature reference value.

[0009] In some embodiments, the apparatus includes: a processor and a memory storing program instructions, wherein the processor is configured to execute the aforementioned method for detecting frost on an air conditioner outdoor unit when running the program instructions.

[0010] In some embodiments, the air-conditioning outdoor unit includes: an outdoor unit body; and the aforementioned device for frost detection of the air-conditioning outdoor unit, which is installed on the outdoor unit body.

[0011] In some embodiments, the computer-readable storage medium stores program instructions, which, when executed, enable a computer to execute the aforementioned method for detecting frost on an air conditioner outdoor unit.

[0012] The method and device for detecting frost on an air conditioner outdoor unit, the air conditioner outdoor unit, and the computer-readable storage medium provided in the embodiments of the present disclosure can achieve the following technical effects: The disclosed embodiment sets a dynamic threshold for frost detection, namely an updated reference temperature. This improves the accuracy of frost detection by adapting to changes in the environment and operating conditions. A sliding window mechanism and preset conditions are used to determine the stability of the outdoor coil temperature. The reference temperature is updated while the air conditioning system is operating to determine the dynamic threshold. This effectively overcomes interference caused by environmental changes and outdoor coil temperature fluctuations, improving the accuracy of frost detection in air conditioners' outdoor units.

[0013] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition, Figure 1 is a schematic diagram of a first method for detecting frost on an air conditioner outdoor unit provided by an embodiment of the present disclosure; Figure 2 is a schematic diagram of a second method for detecting frost on an air conditioner outdoor unit provided by an embodiment of the present disclosure; Figure 3 is a schematic diagram of a third method for detecting frost on an air conditioner outdoor unit provided by an embodiment of the present disclosure; Figure 4 is a schematic diagram of a fourth method for detecting frost on an air conditioner outdoor unit provided by an embodiment of the present disclosure; Figure 5 is an application diagram of an embodiment of the present disclosure; Figure 6 is a schematic diagram of a device for detecting frost on an air conditioner outdoor unit provided by an embodiment of the present disclosure; Figure 7 Schematic diagram of an air-conditioning outdoor unit provided in an embodiment of the present disclosure.

[0015] Reference numerals: 100: device for detecting frost on an air-conditioning outdoor unit; 101: processor; 102: memory; 103: communication interface; 104: bus; 200: air-conditioning outdoor unit. DETAILED DESCRIPTION

[0016] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0017] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0018] Unless otherwise stated, the term "plurality" means two or more.

[0019] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0020] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0021] The term "correspondence" may refer to an association relationship or a binding relationship. The correspondence between A and B means that there is an association relationship or a binding relationship between A and B.

[0022] In the embodiments of the present disclosure, smart home appliances refer to home appliance products that are formed by introducing microprocessors, sensor technology, and network communication technology into home appliances. They have the characteristics of intelligent control, intelligent perception, and intelligent application. The operation process of smart home appliances often relies on the application and processing of modern technologies such as the Internet of Things, the Internet, and electronic chips. For example, smart home appliances can realize remote control and management of smart home appliances by users by connecting to electronic devices.

[0023] Combine Figure 1 As shown, the embodiment of the present disclosure provides a first method for detecting frost on an air conditioner outdoor unit, comprising: S101: The processor collects the outdoor coil temperature in response to an air conditioner start instruction.

[0024] S102: The processor processes the outdoor coil temperature using a sliding window mechanism. When the data stored in the sliding window reaches a maximum value, the processor calculates a related value of the outdoor coil temperature within the sliding window.

[0025] S103 , when the correlation value meets a preset condition, the processor determines to update the reference temperature to obtain an updated reference temperature.

[0026] S104: The processor determines the frost condition of the air conditioner outdoor unit according to the updated reference temperature.

[0027] The reference temperature is the preset outdoor coil temperature reference value.

[0028] Here, the frost condition of the air conditioner outdoor unit is detected, so the response to the air conditioner start command is primarily a response to the air conditioner heating start command. The outdoor coil temperature is collected using a temperature sensor installed on the outdoor coil. There can be one or more temperature sensors. When there are multiple temperature sensors, the outdoor coil temperature is the average of the multiple sensors. The outdoor coil temperature is susceptible to dramatic fluctuations due to factors such as ambient wind speed, compressor start / stop, and residual defrost water film. To avoid excessive sensitivity to transient temperature fluctuations, short-term interference such as compressor start / stop shock and residual defrost effects can be misjudged as frost signals, resulting in frequent and ineffective defrosting. The disclosed embodiment utilizes a sliding window mechanism to process the outdoor coil temperature. The reference temperature is updated after the outdoor coil temperature stabilizes. This effectively eliminates abnormal fluctuations in the outdoor coil temperature in abnormal fluctuation scenarios.

[0029] Specifically, the size and step size of the sliding window are set, and the sliding window begins when the air conditioner starts. Each time the sliding window slides, one or more outdoor coil temperatures are updated (the number of outdoor coil temperature updates is positively correlated with the step size). The outdoor coil temperatures are stored according to the first-in, first-out, and last-in, last-out principles. For example, if the sliding window size is w and the step size is 1, the maximum amount of data that can be stored in the sliding window is w, and the step size of each sliding window is 1 (i.e., the number of outdoor coil temperatures updated each time is one). After the data stored in the sliding window reaches the maximum value, the correlation value of all outdoor coil temperature data in the sliding window is calculated. The correlation value is used to indicate the stability of the outdoor coil temperature. When the correlation value meets the preset conditions, the outdoor coil temperature is stable. At this point, the reference temperature is updated so that the updated reference temperature can be used to determine the frost condition of the air conditioner outdoor unit.

[0030] The correlation value of outdoor coil temperature data can include the concentration of outdoor coil temperatures, such as whether the proportion of outdoor coil temperatures within a certain temperature range is greater than a first threshold (e.g., 70%). A greater concentration indicates a more stable outdoor coil temperature. Alternatively, the correlation value can also include the fluctuation amplitude of the outdoor coil temperature. A greater fluctuation amplitude indicates a more unstable outdoor coil temperature. By calculating the correlation value and setting preset conditions, it is possible to determine whether the outdoor coil temperature is stabilizing. This ensures that the updated baseline temperature is updated after the air conditioning system stabilizes, effectively overcoming interference caused by environmental changes and data fluctuations, and filtering out sudden disturbances such as compressor startup and shutdown and sudden strong winds. Furthermore, the sliding window data rolling update mechanism ensures timely detection while reducing algorithm complexity, effectively avoiding the risk of misjudgment caused by sensor drift. This helps improve the accuracy of frost detection on air conditioning outdoor units.

[0031] Furthermore, it should be noted that the reference temperature is significantly lower than the outdoor coil temperature, thereby enabling a clear distinction between the measured value and the reference temperature setting. For example, the reference temperature is set to -99°C. Optionally, the reference temperature is lower than the outdoor coil temperature and lower than the abnormality indication temperature of the temperature sensor. In the disclosed embodiment, the abnormality indication temperature of the temperature sensor is approximately -64°C. This reduces the impact of transient temperature fluctuations (such as compressor startup and shutdown shocks, transient environmental interference, etc.) on the judgment of frosting results.

[0032] The method for detecting frost in an air conditioner outdoor unit, provided in an embodiment of the present disclosure, determines a dynamic threshold for frost detection, namely an updated reference temperature. To adapt to changes in the environment and operating conditions and improve the accuracy of frost detection, a sliding window mechanism and preset conditions are used to determine the stability of the outdoor coil temperature. The reference temperature is updated while the air conditioning system is operating to obtain a dynamic threshold. This effectively overcomes interference caused by environmental changes and outdoor coil temperature fluctuations, improving the accuracy of frost detection in air conditioners.

[0033] Optionally, in step S102, the processor calculates a value related to the outdoor coil temperature within the sliding window, including: The processor calculates the range between the maximum and minimum outdoor coil temperatures within the sliding window.

[0034] The processor calculates a mode ratio of the outdoor coil temperatures within the sliding window; the mode of the outdoor coil temperatures is the temperature value with the highest frequency of occurrence of the outdoor coil temperatures.

[0035] Here, the relevant values ​​include the range and the mode proportion. The mode refers to the value with the highest frequency of occurrence of the outdoor coil temperature in the sliding window, which is used to measure the central tendency of the data. For example, the data in the sliding window is (-6, -6, -5, -6, -5, -6, -6, -6, -6, -6), then the mode is -6°C. The mode proportion is the ratio of the number of modes to the total amount of data in the sliding window. The range of the maximum and minimum values, range, serves as a range constraint and can characterize the amplitude of temperature fluctuations. The mode proportion m serves as a distribution concentration constraint and can characterize the data concentration. In the embodiment of the present disclosure, these two values ​​are used to judge the stability of the data. When both the range and the mode proportion meet the preset conditions, it is determined that the air-conditioning system is in a stable operating state.

[0036] Optionally, the preset conditions in step S103 include: The range is less than or equal to the range threshold, and the mode proportion is greater than or equal to the proportion threshold.

[0037] Here, we set the range threshold and the proportion threshold. When the range is less than or equal to the range threshold, it indicates that the outdoor coil temperature fluctuates slightly and is relatively stable. When the mode proportion is greater than or equal to the proportion threshold, it indicates that the outdoor coil temperature concentration is high and the data is relatively stable. Therefore, by setting these two conditions, we can ensure automatic calibration of the baseline temperature update.

[0038] Optionally, in step S103, the processor determines to update the reference temperature to obtain an updated reference temperature, including: The processor statistically determines the mode of the outdoor coil temperature within the current sliding window.

[0039] The processor uses the majority value as the updated baseline temperature.

[0040] Here, after the relevant values ​​of the outdoor coil temperature within the current sliding window meet preset conditions, the mode of the outdoor coil temperatures within the current sliding window is calculated and used as the updated reference temperature. For example, if the outdoor coil temperatures within the current sliding window are (-6, -6, -5, -6, -5, -6, -6, -6, -6), and the mode is determined to be -6°C, then the updated reference temperature is used. Subsequently, during the frost detection process, this updated reference temperature serves as the reference value for determining whether the outdoor coil temperature is frosted.

[0041] Combine Figure 2 As shown, the embodiment of the present disclosure provides a second method for detecting frost on an air conditioner outdoor unit, comprising: S101: The processor collects the outdoor coil temperature in response to an air conditioner start instruction.

[0042] S102: The processor processes the outdoor coil temperature using a sliding window mechanism. When the data stored in the sliding window reaches a maximum value, the processor calculates a related value of the outdoor coil temperature within the sliding window.

[0043] S103 , when the correlation value meets a preset condition, the processor determines to update the reference temperature to obtain an updated reference temperature.

[0044] The reference temperature is the preset outdoor coil temperature reference value.

[0045] S104: The processor determines the frost condition of the air conditioner outdoor unit according to the updated reference temperature.

[0046] S205: When the correlation value does not meet the preset condition, the processor continues to collect the outdoor coil temperature and updates the sliding window in real time to calculate a new correlation value.

[0047] If the correlation value does not meet the preset conditions, the sliding window continues to update and calculates the correlation value of the outdoor coil temperature in the latest sliding window in real time. Once the correlation value meets the preset conditions, the reference temperature is updated. Otherwise, the reference temperature is not updated. If the correlation value does not meet the preset conditions, it indicates that the air conditioning system has not entered a stable operating state. Therefore, the sliding window is continuously updated until the calculated new correlation value meets the preset conditions. Furthermore, if the reference temperature has not been updated, the air conditioning system will not enter the frost detection phase. Frost detection is only performed after the reference temperature is updated. This helps reduce the risk of misjudgment caused by disturbances or reference drift.

[0048] Combine Figure 3 As shown, the embodiment of the present disclosure provides a third method for detecting frost on an air conditioner outdoor unit, comprising: S101: The processor collects the outdoor coil temperature in response to an air conditioner start instruction.

[0049] S102: The processor processes the outdoor coil temperature using a sliding window mechanism. When the data stored in the sliding window reaches a maximum value, the processor calculates a related value of the outdoor coil temperature within the sliding window.

[0050] S103 , when the correlation value meets a preset condition, the processor determines to update the reference temperature to obtain an updated reference temperature.

[0051] S141 , the processor counts the number of outdoor coil temperatures after the sliding window update that are lower than the updated reference temperature.

[0052] S142: When the counted number is greater than or equal to the detection threshold, the processor determines that the air conditioner outdoor unit is frosted and triggers a defrost instruction.

[0053] Here, after updating the reference temperature, the number of outdoor coil temperatures in the data within the window after each sliding window update that are lower than the updated reference temperature is counted. It can be understood that the updated reference temperature serves as a critical value for judging the degree of frost, and the updated reference temperature is generally a negative number. When the outdoor coil temperature is lower than the updated reference temperature, it indicates that the risk of frost on the air-conditioning outdoor unit is relatively high. When the number of outdoor coil temperatures lower than the updated reference temperature within the sliding window is greater than or equal to the detection threshold, it indicates that the accumulated amount of low-temperature values ​​of the outdoor coil temperature is large, i.e., the air-conditioning outdoor unit is judged to be frosted. At this time, the defrost instruction of the air conditioner is triggered to perform defrost. The disclosed embodiment utilizes the sliding window and the updated reference temperature to detect frost in a linked manner, thereby realizing accurate judgment of the frosting status of the air-conditioning outdoor unit. Among them, the real-time update of the sliding window data ensures the timeliness of the detection and reduces the complexity of the algorithm.

[0054] Furthermore, the detection threshold can be set based on the size of the sliding window or fuzzy logic control. A detection threshold based on fuzzy logic control can automatically adapt to changes in data within the sliding window. Specifically, multiple fuzzy sets (historical data of outdoor coil temperatures under frosting conditions) are established, along with a fuzzy rule base. Using the Mamdani inference method and the centroid method for defuzzification, precise threshold adjustments are obtained. Rules in the fuzzy rule base can adjust the threshold based on the concentration of outdoor coil temperatures. For example, higher concentrations can appropriately reduce the detection threshold, while lower concentrations can increase the detection threshold, and so on.

[0055] Optionally, the ratio of the detection threshold to the maximum value of the sliding window is greater than or equal to a preset ratio. The preset ratio has a value range of greater than or equal to 70%. Preferably, the preset ratio is 80%.

[0056] Here, assuming the sliding window size is 100 (i.e., the maximum value of the sliding window is 100), the detection threshold is 80. The results of the 100 outdoor coil temperatures within the current sliding window are counted, that is, the number of results in which the temperature is less than the updated reference temperature is counted. If the number is greater than or equal to 80, the defrost command is triggered.

[0057] Combine Figure 4 As shown, the embodiment of the present disclosure provides a fourth method for detecting frost on an air conditioner outdoor unit, comprising: S101: The processor collects the outdoor coil temperature in response to an air conditioner start instruction.

[0058] S102: The processor processes the outdoor coil temperature using a sliding window mechanism. When the data stored in the sliding window reaches a maximum value, the processor calculates a related value of the outdoor coil temperature within the sliding window.

[0059] S103 , when the correlation value meets a preset condition, the processor determines to update the reference temperature to obtain an updated reference temperature.

[0060] S141 , the processor counts the number of outdoor coil temperatures after the sliding window update that are lower than the updated reference temperature.

[0061] S142: When the counted number is greater than or equal to the detection threshold, the processor determines that the air conditioner outdoor unit is frosted and triggers a defrost instruction.

[0062] S143: If the counted number is less than the detection threshold, the processor continuously collects the outdoor coil temperature and updates the sliding window in real time to detect the frost condition in real time. Then, S141 is executed.

[0063] Here, when the counted number is less than the detection threshold, it indicates that the likelihood of frost forming outdoors on the air conditioner is low, or the frost layer is too thin to require defrosting. At this point, the outdoor coil temperature is continuously collected and the sliding window is updated in real time. Then, the number of outdoor coil temperatures below the updated reference temperature in all data after the sliding window is updated is counted in real time. If the most recently counted number is greater than or equal to the detection threshold, it is determined that the air conditioner outdoor unit is frosted, and a defrost command is triggered. Thus, during the frost detection phase, the number of low-temperature samples (i.e., the number of outdoor coil temperatures below the updated reference temperature) is counted by updating the sliding window in real time. When the number of low-temperature samples counted in real time exceeds the critical value (i.e., the detection threshold), a defrost command is triggered.

[0064] Optionally, after step S143, the method further includes: the processor determining a time to count the number again based on a difference between the detection threshold and the counted number.

[0065] It is understandable that when the number of statistics differs significantly from the detection threshold, in order to reduce the amount of calculation and avoid long-term memory occupation, the number of statistics is not performed in real time. Instead, the timing for re-stating the number is determined based on the difference between the two. In detail, when the number of updates of the sliding window reaches the difference, the number of external coil temperatures that are lower than the updated reference temperature is counted again. In this way, when the number of updates of the sliding window does not reach the difference, the number of low-temperature samples is not counted. Alternatively, when the difference is greater than or equal to the second threshold, the number of low-temperature samples is not counted in real time. When the difference is less than the second threshold, the number of low-temperature samples is counted in real time. For example, if the detection threshold is 80 and the number of statistics is ≤60, and it is determined that the difference between the two is large, the value range of the second threshold can be [5,10]. In this way, the computational complexity of the algorithm is further reduced while ensuring the timeliness of the detection.

[0066] It should be noted that the reference temperature is updated only once after each heating cycle. This updated reference temperature is used to monitor frost until the end of the current cycle. The next time the air conditioner starts heating, the reference temperature remains unchanged and is updated again using the sliding window mechanism.

[0067] Combine Figure 5 As shown, the embodiment of the present disclosure provides an application example, which specifically includes: S501, responding to an air-conditioning heating start instruction; S502, real-time collection of outdoor coil temperature; S503, using a sliding window mechanism to process the outdoor coil temperature collected in real time; S504, determine whether the sliding window storage data has reached the maximum value, if yes, execute S505; otherwise, execute S502; S505, calculating the range and mode ratio of the outdoor coil temperature within the sliding window; S506: Determine whether the range is less than or equal to the range threshold, and whether the mode ratio is greater than or equal to the ratio threshold (i.e., determine whether range ≤ range threshold, and m ≥ ratio threshold). If so, execute S508; otherwise, execute S507. S507, update the sliding window in real time, and then execute S505; S508, updating the reference temperature to obtain an updated reference temperature; S509, counting the number of outdoor coil temperatures after the sliding window update that are lower than the updated reference temperature; S510, determining whether the counted number is greater than or equal to the detection threshold, if yes, executing S511; otherwise, executing S512; S511, determining that the air conditioner outdoor unit is frosted and triggering a defrost instruction; S512: Update the sliding window in real time, and then execute S509.

[0068] Combine Figure 6 As shown, an embodiment of the present disclosure provides a device 100 for detecting frost on an air conditioner outdoor unit, comprising a processor 101 and a memory 102. Optionally, the device may further include a communication interface 103 and a bus 104. The processor 101, communication interface 103, and memory 102 may communicate with each other via bus 104. The communication interface 103 may be used for information transmission. The processor 101 may invoke logic instructions stored in the memory 102 to execute the method for detecting frost on an air conditioner outdoor unit according to the above embodiment.

[0069] In addition, the logic instructions in the memory 102 can be implemented in the form of software functional units and can be stored in a computer-readable storage medium when sold or used as an independent product.

[0070] Memory 102, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as the program instructions / modules corresponding to the methods in the embodiments of the present disclosure. Processor 101 executes the program instructions / modules stored in memory 102 to perform functional applications and data processing, thereby implementing the method for detecting frost on an air conditioner outdoor unit in the above-described embodiments.

[0071] The memory 102 may include a program storage area and a data storage area. The program storage area may store an operating system and at least one application required for a function; the data storage area may store data generated based on the use of the terminal device. Furthermore, the memory 102 may include high-speed random access memory and non-volatile memory.

[0072] Combine Figure 7As shown, an embodiment of the present disclosure provides an air-conditioning outdoor unit 200, comprising: an air-conditioning outdoor unit body, and the aforementioned device 100 for detecting frost in an air-conditioning outdoor unit. The device 100 for detecting frost in an air-conditioning outdoor unit is installed in the air-conditioning outdoor unit body. The installation relationship described here is not limited to placement inside the air-conditioning outdoor unit body, but also includes installation connections with other components of the air-conditioning outdoor unit 200, including but not limited to physical connections, electrical connections, or signal transmission connections. It will be understood by those skilled in the art that the device 100 for detecting frost in an air-conditioning outdoor unit can be adapted to a feasible air-conditioning outdoor unit body, thereby realizing other feasible embodiments.

[0073] An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are configured to execute the above-mentioned method for detecting frost on an air-conditioning outdoor unit.

[0074] The technical solutions of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the method described in the embodiments of the present disclosure. The aforementioned storage medium may be a non-transitory storage medium, such as a USB flash drive, a mobile hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, among other media capable of storing program code.

[0075] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural, logical, electrical, process and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. Moreover, the terms used in this application are only used to describe the embodiments and are not used to limit the claims. As used in the description of the embodiments and claims, the singular forms "a", "an" and "the" are intended to also include the plural forms unless the context clearly indicates otherwise. Similarly, the term "and / or" as used in this application means any and all possible combinations of one or more of the associated listings. In addition, when used in this application, the term "comprise" and its variations "comprises" and / or comprising refer to the presence of stated features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or groups thereof. In the absence of further restrictions, an element defined by the sentence "comprising a..." does not exclude the presence of other identical elements in the process, method or device that includes the element. In this article, each embodiment may focus on the differences from other embodiments, and the same and similar parts between the various embodiments can be referenced to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method part disclosed in the embodiments, then the relevant parts can be referred to the description of the method part.

[0076] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software may depend on the specific application and design constraints of the technical solution. The technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. The technicians will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0077] In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices and equipment) can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of units may be merely a logical functional division. In actual implementation, other divisions may be used, such as combining or integrating multiple units or components into another system, or omitting or disabling some features. Furthermore, the couplings or direct couplings or communication connections shown or discussed may be through interfaces, indirect couplings or communication connections between devices or units, and may be electrical, mechanical, or other forms. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units, i.e., they may be located in one location or distributed across multiple network units. Some or all of these units may be selected to implement the embodiments according to actual needs. Furthermore, the functional units in the disclosed embodiments may be integrated into a single processing unit, each unit may exist physically separately, or two or more units may be integrated into a single unit.

[0078] The flowcharts and block diagrams in the accompanying drawings show the possible implementation architectures, functions and operations of the systems, methods and computer program products according to the embodiments of the present disclosure. In this regard, each box in the flowchart or block diagram can represent a module, program segment or part of the code, and the module, program segment or part of the code contains one or more executable instructions for implementing the specified logical functions. In some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. In the descriptions corresponding to the flowcharts and block diagrams in the accompanying drawings, the operations or steps corresponding to different boxes can also occur in an order different from that disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two consecutive operations or steps can actually be executed substantially in parallel, or they can sometimes be executed in the opposite order, which can depend on the functions involved. Each block in the block diagrams and / or flowcharts, and combinations of blocks in the block diagrams and / or flowcharts, may be implemented by a dedicated hardware-based system that performs the specified functions or actions, or may be implemented by a combination of dedicated hardware and computer instructions.

Claims

1. A method for detecting frost on an air conditioner outdoor unit, characterized in that: include: In response to an air conditioner start command, collecting the outdoor coil temperature; Processing the outdoor coil temperature using a sliding window mechanism, and calculating a relevant value of the outdoor coil temperature within the sliding window when the sliding window storage data reaches a maximum value; In the case where the correlation value satisfies a preset condition, determining to update the reference temperature to obtain an updated reference temperature; determining a frosting condition of an air conditioner outdoor unit according to the updated reference temperature; The reference temperature is a preset outdoor coil temperature reference value.

2. The method according to claim 1, characterized in that The calculation of the outdoor coil temperature within the sliding window includes the following values: Calculate the range of the maximum and minimum outdoor coil temperatures within the sliding window; and Calculate the mode ratio of the outdoor coil temperature within the sliding window; the mode of the outdoor coil temperature is the temperature value with the highest frequency of occurrence of the outdoor coil temperature.

3. The method according to claim 1, characterized in that The relevant values ​​include range and mode ratio; the preset conditions include: The range is less than or equal to the range threshold, and the mode proportion is greater than or equal to the proportion threshold.

4. The method according to claim 1, wherein Determining the updated reference temperature to obtain an updated reference temperature includes: Statistically determine the mode of the outdoor coil temperature within the current sliding window; The mode is used as the updated reference temperature.

5. The method according to claim 1, wherein Also includes: When the correlation value does not meet the preset condition, the outdoor coil temperature is continuously collected and the sliding window is updated in real time to calculate a new correlation value.

6. The method according to any one of claims 1 to 5, characterized in that The step of determining the frosting condition of the air conditioner outdoor unit according to the updated reference temperature includes: Counting the number of outdoor coil temperatures within the window after the sliding window is updated that are lower than the updated reference temperature; When the counted number is greater than or equal to the detection threshold, it is determined that the air conditioner outdoor unit is frosted and a defrost instruction is triggered.

7. The method according to claim 6, characterized in that The method further comprises: When the statistical number is less than the detection threshold, the outdoor coil temperature is continuously collected and the sliding window is updated in real time to detect the frost condition in real time.

8. A device for detecting frost on an air conditioner outdoor unit, comprising a processor and a memory storing program instructions, characterized in that: The processor is configured to execute the method for detecting frost in an air conditioner outdoor unit according to any one of claims 1 to 7 when running the program instructions.

9. An air conditioner outdoor unit, characterized in that: include: Outdoor unit body; The device for detecting frost in an air-conditioning outdoor unit according to claim 8 is mounted on the outdoor unit body.

10. A computer-readable storage medium storing program instructions, characterized in that: When the program instructions are executed, the computer is configured to execute the method for detecting frost on an air-conditioning outdoor unit according to any one of claims 1 to 7.

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