Dirt blocking detection method, storage medium, control device and air conditioner

Abstract

This application discloses a method, storage medium, control device, and air conditioner for detecting dirt and clogging in an air conditioner. The method includes: controlling the air conditioner to enter a fan-only mode to bring the fan speed to a fixed speed; acquiring the air conditioner's self-test fan power and self-test temperature, where the self-test fan power is the fan power in the fan-only mode; and determining the degree of dirt and clogging based on the air conditioner's initial power, initial temperature, self-test fan power, and self-test temperature, where the initial power is the fan power when the air conditioner first enters the fan-only mode, and the initial temperature is the operating temperature corresponding to the initial power. This method improves the accuracy of dirt and clogging detection based on fan power and saves on detection costs.

Description

Technical Field

[0001] This application relates to the field of air conditioner technology, and in particular to a method for detecting dirt and blockage in an air conditioner, a computer-readable storage medium, a control device, and an air conditioner. Background Technology

[0002] Air conditioners are designed with filters to isolate foreign objects and purify the air, but they cannot completely filter out fine particles such as dust. As dust accumulates, not only will the filter become clogged, but the heat exchanger, air duct, and fan will also be affected, requiring users to clean them promptly; otherwise, bacteria can easily grow, causing secondary pollution. Current methods for diagnosing air conditioner clogging suffer from high hardware costs or inaccurate diagnoses. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0004] Therefore, the first aspect of the present invention provides a method for detecting dirt and blockage in an air conditioner.

[0005] A second aspect of the present invention provides a computer-readable storage medium.

[0006] A third aspect of the present invention provides a control device.

[0007] A fourth aspect of the present invention provides an air conditioner.

[0008] In view of this, a method for detecting dirt and clogging in an air conditioner is proposed according to a first aspect of the embodiments of this application, comprising:

[0009] The air conditioner is controlled to enter the fan-only mode so that the fan speed of the air conditioner reaches a fixed speed.

[0010] The self-test fan power and self-test temperature of the air conditioner are obtained, wherein the self-test fan power is the fan power of the air conditioner in the air supply mode only.

[0011] Based on the initial power, initial temperature, self-test fan power, and self-test temperature of the air conditioner, the degree of dirt or blockage of the air conditioner is determined. The initial power is the fan power of the air conditioner when it first enters the air-only mode, and the initial temperature is the operating temperature corresponding to the initial power.

[0012] In one feasible implementation, the dirt / clogging detection method further includes:

[0013] The air guide vanes of the air conditioner are controlled to be at a fixed angle.

[0014] In one feasible implementation, determining the degree of dirt / clogging of the air conditioner based on its initial power, initial temperature, self-test fan power, and self-test temperature includes:

[0015] The initial air density and the self-test air density are determined based on the initial temperature and the self-test temperature.

[0016] Based on the initial air density, the self-tested air density, and the initial power, determine the temperature effect value of temperature on the fan power;

[0017] Based on the initial power, the self-test power, and the temperature influence value, the impact value of dirt blockage on the fan power is determined to determine the dirt blockage status of the air conditioner.

[0018] In one feasible implementation, determining the degree of dirt / clogging in the air conditioner based on its initial power, initial temperature, self-test fan power, and self-test temperature includes...

[0019] Based on the initial temperature and the self-test temperature, determine the temperature compensation value for the effect of temperature on the fan power.

[0020] Based on the initial power, the self-test power, and the temperature compensation value, the impact of dirt blockage on the fan power is determined to ascertain the dirt blockage status of the air conditioner.

[0021] In one feasible implementation, the monitoring method further includes:

[0022] Calculate the fouling impact rate based on the fouling impact value and the initial power;

[0023] If the dirt blockage impact rate is greater than or equal to the preset impact rate, the air conditioner is determined to be dirty and clogged.

[0024] In one feasible implementation, the monitoring method further includes:

[0025] Based on the total operating time of the air conditioner;

[0026] The control of the air conditioner to enter the fan-only mode includes:

[0027] When the total running time of the air conditioner reaches the preset total running time and the air conditioner is turned on again, the air conditioner is controlled to enter the fan-only mode.

[0028] In one feasible implementation, the self-testing fan power and the initial power are both the average power of the fan during a preset single operation time at the fixed speed.

[0029] In one feasible implementation, the self-test temperature and the initial temperature are the indoor temperature of the air conditioner in the fan-only mode, or...

[0030] The self-test temperature and the initial temperature are the heat exchanger temperatures of the air conditioner.

[0031] In one feasible implementation, before controlling the air conditioner to enter the fan-only mode, the method further includes:

[0032] When the air conditioner is in cooling mode, turn off the air conditioner compressor and turn on the fan to continue immediately.

[0033] Stop the air supply and turn on the compressor to heat, continuing for a second time;

[0034] The compressor is turned off to stop heating.

[0035] With the air conditioner in heating mode, the compressor is turned off and the fan is turned on, which has continued for three hours.

[0036] Stop supplying air.

[0037] In one feasible implementation, the monitoring method further includes:

[0038] Based on the initial temperature and the fixed rotation speed, query the initial standard power of the fan;

[0039] Determine the standard power correction factor based on the initial standard power and the initial power;

[0040] Based on the self-test temperature and the fixed rotation speed, query the self-test standard power of the fan;

[0041] The self-test standard power is corrected based on the standard power correction factor;

[0042] Based on the self-test fan power and the corrected self-test standard power, the degree of dirt and blockage in the air conditioner is determined.

[0043] According to a second aspect of the embodiments of this application, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program that implements the method for detecting dirt and blockage in an air conditioner as described in any of the above technical solutions.

[0044] A control device is provided according to a third aspect of the embodiments of this application, comprising:

[0045] Memory, which stores computer programs;

[0046] The processor executes the computer program;

[0047] When the processor executes the computer program, it implements the air conditioner dirt and blockage detection method as described in any of the above technical solutions.

[0048] According to a fourth aspect of the embodiments of this application, an air conditioner is provided, comprising:

[0049] The control device as described in the above technical solution.

[0050] Compared to existing technologies, the present invention offers at least the following advantages: The air conditioner clogging detection method provided in this application controls the air conditioner to enter a fan-only mode, thereby increasing the fan speed to a fixed speed. The self-test fan power and self-test temperature of the air conditioner are acquired, where the self-test fan power is the fan power of the air conditioner in the fan-only mode. Based on the initial power, initial temperature, self-test fan power, and self-test temperature of the air conditioner, the clogging status of the air conditioner is determined, where the initial power is the fan power of the air conditioner when it first enters the fan-only mode, and the initial temperature is the operating temperature corresponding to the initial power. By controlling the air conditioner to collect initial and self-test data in fan-only mode, the above solution effectively avoids the impact of load changes caused by refrigerant flow-induced changes in the state of the indoor unit cavity on fan power changes, thus improving the accuracy of clogging detection based on fan power. Furthermore, considering the impact of changes in the air temperature surrounding the air conditioner on fan power further improves the accuracy of clogging detection based on fan power. Furthermore, this method eliminates the need for additional hardware such as infrared sensors or photosensitive sensors to directly acquire information about the filter's clogging level, thus saving on clogging detection costs. Additionally, since the parameters used to determine clogging status do not include the fan motor's drive parameters, it avoids the influence of control-related factors such as chip jamming and radiation interference on clogging detection. Attached Figure Description

[0051] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0052] Figure 1 A schematic flowchart illustrating the steps of a method for detecting dirt and blockage in an air conditioner according to an embodiment of this application;

[0053] Figure 2 A structural block diagram of a computer-readable storage medium according to an embodiment of this application;

[0054] Figure 3A schematic structural block diagram of a control device according to an embodiment of this application;

[0055] Figure 4 A schematic structural block diagram of an air conditioner according to an embodiment of this application. Detailed Implementation

[0056] To better understand the above technical solutions, the technical solutions of the embodiments of this application will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this application and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this application, rather than limitations on the technical solutions of this application. In the absence of conflict, the embodiments of this application and the technical features in the embodiments can be combined with each other.

[0057] like Figure 1 As shown, a method for detecting dirt and clogging in an air conditioner is proposed according to a first aspect of the embodiments of this application, which may include:

[0058] Step 101: Control the air conditioner to enter fan-only mode. Entering fan-only mode will cause the air conditioner's fan speed to reach a fixed speed. It can be understood that fan-only mode means the air conditioner is not performing cooling or heating, or any other refrigerant heat exchange. The fixed speed can be any speed within the fan motor's achievable range; it is not limited here. For example, it could be 1000 rpm or 500 rpm.

[0059] For example, the aforementioned control of the air conditioner to enter the fan-only mode can be understood as controlling the air conditioner to enter a self-test mode. For instance, it could be that the program is set to control the air conditioner to enter this fan-only mode for self-testing under certain conditions, or it could be based on a user's request to enter this fan-only mode for self-testing. The air conditioner mentioned above can be the indoor unit of an air conditioner or a portable air conditioner that can be moved; there is no limitation here.

[0060] Step 102: Obtain the air conditioner's self-test fan power and self-test temperature. The self-test fan power can be the fan power of the air conditioner in fan-only mode. This means the self-test fan power is the fan power when the air conditioner is not cooling or heating and there is no refrigerant heat exchange, and the fan speed is at the aforementioned fixed speed. The fan power can be understood as the fan motor power.

[0061] For example, the self-test temperature mentioned above can be the operating temperature corresponding to the self-test fan power.

[0062] Step 103: Determine the degree of dirt or blockage in the air conditioner based on its initial power, initial temperature, self-test fan power, and self-test temperature. The initial power refers to the fan power when the air conditioner first enters the fan-only mode, and the initial temperature is the operating temperature corresponding to the initial power.

[0063] For example, the initial power mentioned above is the fan power when the air conditioner is first powered on and enters the above-mentioned fan-only mode, and the fan speed reaches the above-mentioned fixed speed.

[0064] It should be noted that the aforementioned clogging can refer to one or more of the following: clogged filters, clogged heat exchangers, clogged air ducts, and clogged fan impellers in the indoor unit. This clogging can directly lead to a reduction in airflow at the indoor unit's air intake. Reduced airflow affects the operation of related actuators, such as the indoor unit's fan power. Therefore, the degree of dust accumulation and clogging in the indoor unit can be assessed by examining the fan power, thus indirectly detecting any clogging issues.

[0065] It should be noted that motor power is affected by two variables: torque and speed. Torque is related to the load. Therefore, assuming a constant speed, factors that can cause load changes and affect the fan motor power can include operating conditions such as air temperature or humidity, as well as internal factors such as refrigerant flow and machine blockage.

[0066] The effect of air temperature on motor power can be determined through the following analysis:

[0067] The formula for calculating the power of a ventilator is as follows:

[0068]

[0069] In formula (1), P u For the power of the ventilation fan, p is the volumetric flow rate under stagnant import conditions, hereinafter referred to as air volume. f For the fan pressure, k p This refers to the compressibility coefficient. For air conditioners, the compressibility coefficient k is... p =1. Therefore, the wind turbine power P u It relates to two variables, namely air volume. and fan pressure p f Based on formula (1), the following conclusions can be derived:

[0070] ΔP u ≈KΔρ (2)

[0071] In equation (2), K is a constant. Equation (2) means that when the indoor ambient temperature changes, the power change ΔP of the fan motor is as follows: uIt is directly proportional to the change in gas density Δρ.

[0072] On the other hand, the ideal gas law:

[0073] pV = nRT (3)

[0074] In equation (3), p is the pressure, V is the gas volume, T is the temperature, n is the amount of substance of the gas, and R is the molar gas constant. Therefore, for equal masses of gas under constant pressure, the relationship between volume and temperature is:

[0075]

[0076] The formula for calculating the density of dry air is:

[0077]

[0078] Combining equations (4) and (5), we have:

[0079]

[0080] Here, k is a constant, showing that for equal masses of gas under constant pressure, temperature and density are inversely proportional. Therefore, the operating temperature of an air conditioner and the power of the indoor fan motor are inversely proportional.

[0081] The impact of air humidity on motor power can be determined through the following analysis:

[0082] The impact of humidity on power can be theoretically analyzed. At a given air pressure, the higher the temperature, the more water vapor a unit volume of air can contain. Since water vapor density is lower than that of dry air, more water vapor leads to a decrease in air density. Therefore, at a given air pressure and temperature, higher relative humidity results in lower air density. Given the direct proportionality between air density and fan motor power, it can be deduced that at a given air pressure and temperature, higher relative humidity results in lower fan motor power. However, based on extensive test data, the impact of humidity is minimal; therefore, the aforementioned dirt and clogging detection scheme does not consider air humidity as a factor in determining the degree of dirt and clogging.

[0083] The air conditioner clogging detection method provided in this application embodiment controls the air conditioner to enter a fan-only mode, so that the fan speed of the air conditioner reaches a fixed speed. The self-test fan power and self-test temperature of the air conditioner are acquired, wherein the self-test fan power is the fan power of the air conditioner in the fan-only mode. Based on the initial power, initial temperature, self-test fan power, and self-test temperature of the air conditioner, the clogging status of the air conditioner is determined, wherein the initial power is the fan power of the air conditioner when it first enters the fan-only mode, and the initial temperature is the operating temperature corresponding to the initial power. In the above scheme, by controlling the air conditioner to collect initial data and self-test data in fan-only mode, the influence of load changes caused by refrigerant flow-induced changes in the state of the indoor unit cavity on fan power changes can be effectively avoided, thereby improving the accuracy of clogging detection based on fan power. Simultaneously, considering the influence of changes in the air temperature surrounding the air conditioner on the fan power further improves the accuracy of clogging detection based on fan power. Furthermore, this method eliminates the need for additional hardware such as infrared sensors or photosensitive sensors to directly acquire information about the filter's clogging level, thus saving on clogging detection costs. Additionally, since the parameters used to determine clogging status do not include the fan motor's drive parameters, it avoids the influence of control-related factors such as chip jamming and radiation interference on clogging detection.

[0084] According to some embodiments, the dirt blockage detection method may further include controlling the air guide vanes of the air conditioner at a fixed angle. It should be noted that, while maintaining a fixed rotational speed, factors that can cause load changes and affect the fan motor power should also include the air guide vane angle, a mechanical factor. By fixing the air guide vane angle, the impact of air guide vane angle changes on fan power can be reduced, further improving the accuracy of dirt blockage detection based on fan power.

[0085] According to some embodiments, step 103 may include:

[0086] Determine the initial air density and the self-test air density based on the initial temperature and the self-test temperature;

[0087] Determine the temperature effect of temperature on fan power based on the initial air density, self-tested air density, and initial power.

[0088] Based on the initial power, self-test power, and temperature influence value, the impact of dirt blockage on fan power is determined to ascertain the dirt blockage status of the air conditioner.

[0089] It should be noted that, based on the analysis of the impact of air temperature on motor power, this impact is primarily due to the influence of air density. Therefore, the temperature-related impact on fan power can be determined based on the initial power, initial air density, and self-test air density. For example, look up the air density values ​​corresponding to the initial and self-test temperatures. Calculate the percentage change in air density, and multiply this percentage (or a percentage adjusted by a coefficient) by the initial power to determine the change in fan power due to temperature variations. After eliminating the change in fan power due to temperature variations, the change in fan power due to dirt / clogging can be obtained.

[0090] For example, regarding the impact of dirt blockage on fan power ΔP0, assuming the fan power P obtained from subsequent self-tests... ux and initial power P uo If the change in fan motor power is ΔP, then ΔP = P ux -P u0 =ΔP0 + ΔP1, where ΔP0 is the power change caused by clogging, and ΔP1 is the power change caused by the operating load, which is related to the indoor ambient temperature T1 and humidity H. Therefore, ΔP1 = f1(T1, H). Since the influence of humidity on fan power is relatively small, from the perspective of saving costs and reducing sensors, the influence of humidity on fan power can be ignored, so ΔP1 ≈ f1(T1). Defined by absolute value, ΔP0 = |P ux -P u0 -f1(T1)|. Therefore, if the self-test temperature is greater than the initial temperature, then ΔP1 < 0, ΔP0 = |ΔP - ΔP1| = |P ux -P u0 +|f1(T1)||, if the self-test temperature is less than the initial temperature, then ΔP1>0, ΔP0=|ΔP-ΔP1|=|P ux -P u0 -f1(T1)|. For example, the degree of dirt and grime in an air conditioner can be determined based on the dirt and grime impact value ΔP0 on the fan power.

[0091] According to some embodiments, step 103 above may include:

[0092] Based on the initial temperature and the self-test temperature, determine the temperature compensation value for the effect of temperature on the fan power.

[0093] Based on the initial power, self-test power, and temperature compensation value, the impact of dirt blockage on the fan power is determined to ascertain the dirt blockage status of the air conditioner.

[0094] For example, continuing the analysis of the impact of air temperature on motor power, the main reason for this impact is the influence of air density. Therefore, the temperature effect on fan power can be determined based on the initial power, initial air density, and self-test air density. Since temperature affects fan motor power through density, and the relationship is inversely proportional to temperature and directly proportional to power, the temperature compensation value PT for the impact of temperature on fan power can be determined based on the initial temperature and self-test temperature. For example, the initial temperature T10 and the self-test temperature T1... x A 1-degree difference corresponds to a 0.1-watt power compensation. Furthermore, if the self-tested temperature is higher than the initial temperature, the compensation value is negative; if the self-tested temperature is lower than the initial temperature, the compensation value is positive. Therefore, PT = 0.1 * (|T10 - T1) x The temperature compensation scheme described above is relatively simpler, which can improve the efficiency of determining the situation of dirt blockage.

[0095] According to some embodiments, the above-mentioned method for detecting dirt and clogging in air conditioners may further include:

[0096] Calculate the fouling impact rate based on the fouling impact value and initial power;

[0097] If the impact rate of dirt blockage is greater than or equal to the preset impact rate, the air conditioner is determined to be dirty and clogged.

[0098] For example, the impact value ΔP0 of the dirt blockage and the initial power P can be calculated. u0 The ratio α can be interpreted as the aforementioned dirt and clogging impact rate. We can then determine the magnitude of the dirt and clogging impact rate α compared to the preset impact rate α0. If the dirt and clogging impact rate is greater than or equal to the preset impact rate, the air conditioner is determined to be dirty and clogged. If the dirt and clogging impact rate is less than the preset impact rate, the air conditioner is determined not to be dirty and clogged.

[0099] According to some embodiments, the above-mentioned method for detecting dirt and clogging in air conditioners may further include:

[0100] Based on the total operating time of the air conditioner;

[0101] Controlling the air conditioner to enter fan-only mode can include:

[0102] When the total running time of the air conditioner reaches the preset total running time and the air conditioner is turned on again, control the air conditioner to enter the fan-only mode.

[0103] It should be noted that since indoor unit clogging is generally not an issue when the total operating time of the air conditioner is short, to reduce unnecessary clogging detection and calculations, the need for clogging detection can be determined based on the relationship between the total operating time of the air conditioner and the preset total operating time. This is achieved by controlling the air conditioner to enter fan-only mode in step 101. This effectively reduces unnecessary clogging detection and calculations.

[0104] According to some embodiments, the self-test fan power and the initial power can both be the average power of the fan running at a fixed speed for a preset single running time.

[0105] For example, the power of the fan when it reaches a fixed speed or during operation can be obtained as the self-test fan power and initial power. However, the self-test fan power and initial power obtained in this case are relatively unstable and cannot accurately reflect the actual self-test fan power and initial power of the fan. Therefore, the average power of the fan during a preset single operation time at a fixed speed can be used as the aforementioned self-test fan power and initial power. This can further improve the accuracy of dirt blockage detection.

[0106] According to some embodiments, the self-test temperature and initial temperature are the indoor temperature of the air conditioner in fan-only mode, or the self-test temperature and initial temperature are the heat exchanger temperature of the air conditioner. It is understood that in fan-only mode, there is no refrigerant flow, and the heat exchanger temperature T2 is close to the indoor temperature T1. This increases the flexibility of the solution; if sensors are present at the heat exchanger or indoors to directly obtain the temperature, the number of sensors can be further reduced, thereby lowering costs.

[0107] According to some embodiments, before controlling the air conditioner to enter the fan-only mode, the above-mentioned dirt and blockage detection method may further include:

[0108] When the air conditioner is in cooling mode, turn off the compressor and turn on the fan to continue operation immediately. Then, turn off the fan and turn on the compressor to start heating to continue operation temporarily; finally, turn off the compressor to stop heating.

[0109] With the air conditioner in heating mode, turn off the compressor and turn on the fan to continue for a third time. Then stop the fan.

[0110] It should be noted that after obtaining initial data including initial power, and before obtaining the self-test fan power, if the air conditioner is already in cooling or heating mode, the air conditioner can be pre-processed to reduce the impact of refrigerant flow on the load, thereby improving the accuracy of data acquisition and thus improving the accuracy of dirt and blockage detection.

[0111] In some examples, when the air conditioner is in cooling mode, drying logic can reduce the impact of refrigerant flow on the load. For instance, the air conditioner's compressor can be turned off, the fan function can be activated, and this can be maintained for a first time. After this first time, the fan function can be stopped, the compressor can be turned on, and heating can be activated, maintaining this for a second time. After this second time, the compressor can be turned off to stop heating. In this way, the drying logic reduces the impact of refrigerant flow on the load, improving the accuracy of data acquisition and thus the accuracy of dirt and blockage detection.

[0112] In some examples, when the air conditioner is in heating mode, the impact of refrigerant flow on the load can be reduced by using waste heat removal logic. For instance, the compressor can be turned off, the fan can be run, and this can be continued for a third time. After this third time, the fan can be stopped. In this way, the impact of refrigerant flow on the load can be reduced through the waste heat removal logic, thereby improving the accuracy of data acquisition and, consequently, the accuracy of dirt and blockage detection.

[0113] According to some embodiments, the above-described dirt and clogging detection method may further include:

[0114] Based on the initial temperature and fixed speed, query the initial standard power of the fan.

[0115] Determine the standard power correction factor based on the initial standard power and the initial power.

[0116] Based on the self-test temperature and the fixed rotation speed, query the self-test standard power of the fan.

[0117] The self-test standard power is corrected based on the standard power correction factor.

[0118] The degree of dirt and blockage in the air conditioner is determined based on the self-tested fan power and the corrected self-tested standard power.

[0119] For example, after the air conditioner is first powered on, it can be run in fan-only mode. After running for a few minutes, the initial fan speed N1 and indoor temperature T1 are recorded, and the average power P1 during fan operation is calculated as the initial power. Based on the initial fan speed N1 and indoor temperature T1, the parameter table in the indoor unit's storage unit or server is queried to find the initial standard power at the corresponding speed and temperature. The initial power P1 is then compared with the initial standard power P. 标1 Calculate the standard power correction factor A = |P1 - P 标1 | / P 标1 A can correct power deviations caused by individual differences in motors, ranging from 1% to 5%.

[0120] For example, when restarting in fan-only mode, if the fan's cumulative running time reaches the preset time and runs continuously for a period of time, the fan's self-test speed N is recorded. iand self-test temperature T i Calculate the average power P during the wind turbine's operating time. i As the self-tested fan power, it is based on the self-tested speed N. i and self-test temperature T i Query the parameter table in the internal storage unit or server to find the self-test standard power P for the corresponding speed and environment. 标i The corrected self-test standard power P is calculated based on the standard power correction factor A. 修i Therefore, at the same rotational speed and temperature, when the indoor unit is clogged, the fan motor power will decrease. According to the self-test fan power P... i and the corrected self-test standard power P 修i Determine whether to activate the dirt / clogging detection alert function. If P i ≥P 修i If P, it means the indoor unit is not currently clogged and does not require testing. i <P 修i If the problem persists, the dirt / clogging detection and alert function will be activated, and the power deviation value |P caused by the dirt / clogging will be calculated. i -P 修i | / P 修i For example, the level of blockage can also be determined based on the calculated power deviation value caused by the blockage. For instance, a power deviation value less than 80% is classified as minor blockage. A power deviation value between 80% and 100% is classified as severe blockage. A power deviation value of 100% is classified as complete blockage.

[0121] like Figure 2 As shown, according to a second aspect of the embodiments of this application, a computer-readable storage medium 201 is provided, which stores a computer program 202 to implement a method for detecting dirt and blockage in an air conditioner as described in any of the above technical solutions.

[0122] The computer-readable storage medium 201 provided in this application embodiment controls the air conditioner to enter a fan-only mode, so that the fan speed of the air conditioner reaches a fixed speed. The self-test fan power and self-test temperature of the air conditioner are acquired, wherein the self-test fan power is the fan power of the air conditioner in the fan-only mode. Based on the initial power, initial temperature, self-test fan power, and self-test temperature of the air conditioner, the degree of dirt / clogging of the air conditioner is determined, wherein the initial power is the fan power of the air conditioner when it first enters the fan-only mode, and the initial temperature is the operating temperature corresponding to the initial power. In the above solution, by controlling the air conditioner to collect initial and self-test data in fan-only mode, the influence of load changes caused by refrigerant flow-induced changes in the state of the indoor unit cavity on the fan power can be effectively avoided, thereby improving the accuracy of dirt / clogging detection based on fan power. Simultaneously, considering the influence of changes in the air temperature around the air conditioner on the fan power further improves the accuracy of dirt / clogging detection based on fan power. Furthermore, this method eliminates the need for additional hardware such as infrared sensors or photosensitive sensors to directly acquire information about the filter's clogging level, thus saving on clogging detection costs. Additionally, since the parameters used to determine clogging status do not include the fan motor's drive parameters, it avoids the influence of control-related factors such as chip jamming and radiation interference on clogging detection.

[0123] It is understandable that entering the aforementioned fan-only mode will cause the air conditioner's fan speed to reach a fixed speed. It is also understood that the aforementioned fan-only mode can be interpreted as a situation where the air conditioner is not performing cooling or heating, or where heat exchange occurs with the refrigerant. The aforementioned fixed speed can be any speed within the fan motor's achievable range, and is not limited here; for example, it could be 1000 revolutions per minute, or it could be 500 revolutions per minute. Controlling the air conditioner to enter fan-only mode can be understood as controlling the air conditioner to enter a self-test mode. For example, it could be that the program is set to control the air conditioner to enter this fan-only mode for self-testing under certain conditions, or it could be based on a user request to enter this fan-only mode for self-testing.

[0124] It is understandable that the self-tested fan power can be the fan power under the condition that the air conditioner is not cooling or heating and there is heat exchange with refrigerant, and the fan speed is at the aforementioned fixed speed. The aforementioned fan power can be understood as the fan motor power. For example, the aforementioned self-tested temperature can be the operating temperature corresponding to the self-tested fan power.

[0125] It is understandable that the initial power mentioned above is the fan power when the air conditioner is first powered on and enters the above-mentioned fan-only mode, and the fan speed reaches the above-mentioned fixed speed.

[0126] It should be noted that the aforementioned clogging can refer to one or more of the following: clogged filters, clogged heat exchangers, clogged air ducts, and clogged fan impellers in the indoor unit. This clogging can directly lead to a reduction in airflow at the indoor unit's air intake. Reduced airflow affects the operation of related actuators, such as the indoor unit's fan power. Therefore, the degree of dust accumulation and clogging in the indoor unit can be assessed by examining the fan power, thus indirectly detecting any clogging issues.

[0127] It should be noted that motor power is affected by two variables: torque and speed. Torque is related to the load. Therefore, assuming a constant speed, factors that can cause load changes and affect the fan motor power can include operating conditions such as air temperature or humidity, as well as internal factors such as refrigerant flow and machine blockage.

[0128] Based on this understanding, the technical solution of this application can be embodied in the form of a software product. This software product can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, or portable hard drive), and includes several instructions to cause a computer device (such as a personal computer, server, or network device) to execute the methods described in the various implementation scenarios of this application.

[0129] like Figure 3 As shown, a control device 300 is proposed according to a third aspect of the embodiments of this application, including: a memory 301 storing a computer program; and a processor 302 executing the computer program; wherein, when the processor 302 executes the computer program, it implements the method for detecting dirt and blockage in an air conditioner as described in any of the above technical solutions.

[0130] The control device 300 provided in this embodiment controls the air conditioner to enter a fan-only mode, thereby bringing the air conditioner's fan speed to a fixed speed. It acquires the air conditioner's self-test fan power and self-test temperature, where the self-test fan power is the fan power of the air conditioner in the fan-only mode. Based on the air conditioner's initial power, initial temperature, self-test fan power, and self-test temperature, it determines the degree of clogging in the air conditioner, where the initial power is the fan power when the air conditioner first enters the fan-only mode, and the initial temperature is the operating temperature corresponding to the initial power. By controlling the air conditioner to collect initial and self-test data in fan-only mode, the above solution effectively avoids the impact of load changes caused by refrigerant flow-induced changes in the indoor unit cavity's state on fan power changes, thus improving the accuracy of clogging detection based on fan power. Furthermore, considering the impact of changes in the air temperature surrounding the air conditioner on fan power further improves the accuracy of clogging detection based on fan power. Furthermore, this method eliminates the need for additional hardware such as infrared sensors or photosensitive sensors to directly acquire information about the filter's clogging level, thus saving on clogging detection costs. Additionally, since the parameters used to determine clogging status do not include the fan motor's drive parameters, it avoids the influence of control-related factors such as chip jamming and radiation interference on clogging detection.

[0131] It is understandable that entering the aforementioned fan-only mode will cause the air conditioner's fan speed to reach a fixed speed. It is also understood that the aforementioned fan-only mode can be interpreted as a situation where the air conditioner is not performing cooling or heating, or where heat exchange occurs with the refrigerant. The aforementioned fixed speed can be any speed within the fan motor's achievable range, and is not limited here; for example, it could be 1000 revolutions per minute, or it could be 500 revolutions per minute. Controlling the air conditioner to enter fan-only mode can be understood as controlling the air conditioner to enter a self-test mode. For example, it could be that the program is set to control the air conditioner to enter this fan-only mode for self-testing under certain conditions, or it could be based on a user request to enter this fan-only mode for self-testing.

[0132] It is understandable that the self-tested fan power can be the fan power under the condition that the air conditioner is not cooling or heating and there is heat exchange with refrigerant, and the fan speed is at the aforementioned fixed speed. The aforementioned fan power can be understood as the fan motor power. For example, the aforementioned self-tested temperature can be the operating temperature corresponding to the self-tested fan power.

[0133] It is understandable that the initial power mentioned above is the fan power when the air conditioner is first powered on and enters the above-mentioned fan-only mode, and the fan speed reaches the above-mentioned fixed speed.

[0134] It should be noted that the aforementioned clogging can refer to one or more of the following: clogged filters, clogged heat exchangers, clogged air ducts, and clogged fan impellers in the indoor unit. This clogging can directly lead to a reduction in airflow at the indoor unit's air intake. Reduced airflow affects the operation of related actuators, such as the indoor unit's fan power. Therefore, the degree of dust accumulation and clogging in the indoor unit can be assessed by examining the fan power, thus indirectly detecting any clogging issues.

[0135] It should be noted that motor power is affected by two variables: torque and speed. Torque is related to the load. Therefore, assuming a constant speed, factors that can cause load changes and affect the fan motor power can include operating conditions such as air temperature or humidity, as well as internal factors such as refrigerant flow and machine blockage.

[0136] In some examples, the control device 300 may also include a user interface, a network interface, a camera, radio frequency (RF) circuitry, sensors, audio circuitry, a Wi-Fi module, and so on. The user interface may include a display screen, input units such as a keyboard, and optional user interfaces may include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (such as a Wi-Fi interface), etc.

[0137] In an exemplary embodiment, the control device 300 may further include an input / output interface and a display device, wherein the various functional units can communicate with each other via a bus. The memory 301 stores a computer program, and the processor 302 is used to execute the program stored in the memory 301 and perform the methods described in the above embodiments.

[0138] The aforementioned storage medium may also include an operating system and a network communication module. The operating system is a program that manages the hardware and software resources of the physical device described above, supporting the operation of information processing programs and other software and / or programs. The network communication module is used to enable communication between the various components within the storage medium, as well as communication with other hardware and software in the information processing physical device.

[0139] Through the above description of the embodiments, those skilled in the art can clearly understand that this application can be implemented by means of software plus necessary general-purpose hardware platform, or it can be implemented by hardware.

[0140] According to a fourth aspect of the embodiments of this application, an air conditioner 400 is provided, including: a control device 300 as described above.

[0141] The air conditioner provided in this application includes the control device of the above-mentioned technical solution, and therefore possesses all the beneficial effects of the control device of the above-mentioned technical solution, which will not be elaborated here.

[0142] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0143] In the description of this invention, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0144] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0145] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for detecting dirt and blockage in an air conditioner, characterized in that, include: The air conditioner is controlled to enter the fan-only mode so that the fan speed of the air conditioner reaches a fixed speed. The fan-only mode is when the air conditioner is not cooling or heating and heat exchange occurs in the refrigerant. The self-test fan power and self-test temperature of the air conditioner are obtained, wherein the self-test fan power is the fan power of the air conditioner in the air supply mode only, and the self-test temperature is the operating temperature corresponding to the self-test fan power; Based on the initial power, initial temperature, self-test fan power, and self-test temperature of the air conditioner, the dirt and blockage status of the air conditioner is determined, wherein the initial power is the fan power of the air conditioner when it first enters the air supply mode only, and the initial temperature is the operating temperature corresponding to the initial power; The process of determining the degree of dirt or blockage in the air conditioner based on its initial power, initial temperature, self-test fan power, and self-test temperature includes: The initial air density and the self-test air density are determined based on the initial temperature and the self-test temperature. Based on the initial air density, the self-tested air density, and the initial power, determine the temperature effect value of temperature on the fan power; Based on the initial power, the self-test fan power, and the temperature influence value, the dirt blockage influence value on the fan power is determined to determine the dirt blockage status of the air conditioner; or, The process of determining the degree of dirt or blockage in the air conditioner based on its initial power, initial temperature, self-test fan power, and self-test temperature includes: Based on the initial temperature and the self-test temperature, determine the temperature compensation value for the effect of temperature on the fan power. Based on the initial power, the self-test fan power, and the temperature compensation value, the impact of dirt blockage on the fan power is determined to ascertain the dirt blockage status of the air conditioner. Before controlling the air conditioner to enter the fan-only mode, the method further includes: When the air conditioner is in cooling mode, turn off the air conditioner compressor and turn on the fan to continue immediately. Stop the air supply and turn on the compressor to heat, continuing for a second time; The compressor is turned off to stop heating. When the air conditioner is in heating mode, the compressor is turned off and the fan is turned on to continue for a third time. Stop supplying air.

2. The method according to claim 1, characterized in that, Also includes: The air guide vanes of the air conditioner are controlled to be at a fixed angle.

3. The method according to claim 1, characterized in that, Also includes: Calculate the fouling impact rate based on the fouling impact value and the initial power; If the dirt blockage impact rate is greater than or equal to the preset impact rate, the air conditioner is determined to be dirty and clogged.

4. The method according to claim 1, characterized in that, Also includes: Based on the total operating time of the air conditioner; The control of the air conditioner to enter the fan-only mode includes: When the total running time of the air conditioner reaches the preset total running time and the air conditioner is turned on again, the air conditioner is controlled to enter the fan-only mode.

5. The method according to claim 1, characterized in that, The self-tested fan power and the initial power are both the average power of the fan during a preset single run at a fixed speed.

6. The method according to claim 1, further comprising: Based on the initial temperature and the fixed rotation speed, query the initial standard power of the fan; Determine the standard power correction factor based on the initial standard power and the initial power; Based on the self-test temperature and the fixed rotation speed, query the self-test standard power of the fan; The self-test standard power is corrected based on the standard power correction factor; Based on the self-tested fan power and the corrected self-test standard power, it is determined whether to enter the dirt blockage detection reminder function. Specifically, if the self-tested fan power is less than the corrected self-test standard power, the dirt blockage detection reminder function is entered, and the power deviation caused by dirt blockage is calculated using the following formula: |The self-tested fan power - the corrected self-tested standard power| ÷ the corrected self-tested standard power; The level of clogging is determined based on the calculated power deviation value caused by clogging.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that implements the method for detecting dirt and blockage in an air conditioner as described in any one of claims 1 to 6.

8. A control device, characterized in that, include: Memory, which stores computer programs; The processor executes the computer program; Wherein, when the processor executes the computer program, it implements the method for detecting dirt and blockage in an air conditioner as described in any one of claims 1 to 6.

9. An air conditioner, characterized in that, include: The control device as described in claim 8.

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