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

Abstract

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

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] When the air conditioner is in the fan-only mode, the current fan speed of the air conditioner is obtained and determined as the self-test fan 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 at the self-test fan speed;

[0011] Based on the initial power, initial temperature, initial speed, self-test fan power, self-test fan speed, and self-test temperature of the air conditioner, the dirt and blockage status 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 operates at the initial speed, 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, the dirt / clogging detection method further includes:

[0015] The speed adjustment coefficient is determined based on the self-tested fan speed and the initial speed.

[0016] The power of the self-testing fan is adjusted according to the speed adjustment coefficient to obtain the comparison power.

[0017] In one feasible implementation, the speed adjustment coefficient is the cube of the ratio of the self-tested fan speed to the initial speed.

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

[0019] The initial air density and the self-test air density are determined based on the initial temperature and the self-test temperature.

[0020] 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;

[0021] Based on the initial power, the comparative power, and the temperature influence value, the impact of dirt blockage on the fan power is determined to ascertain the dirt blockage status of the air conditioner.

[0022] In one feasible implementation, determining the dirt / clogging status of the air conditioner based on its initial power, initial temperature, initial speed, self-test fan power, self-test fan speed, and self-test temperature includes:

[0023] Based on the initial temperature and the self-test temperature, determine the temperature compensation value for the effect of temperature on the fan power.

[0024] Based on the initial power, the comparison 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.

[0025] In one feasible implementation, the dirt / clogging detection method further includes:

[0026] Calculate the fouling impact rate based on the fouling impact value and the initial power;

[0027] 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.

[0028] In one feasible implementation, the dirt / clogging detection method further includes:

[0029] Based on the total operating time of the air conditioner;

[0030] The step of obtaining the current fan speed of the air conditioner and determining it as the self-test fan speed includes:

[0031] When the total running time of the air conditioner reaches the preset total running time and the air conditioner is turned on again, the current fan speed of the air conditioner is obtained and determined as the self-test fan speed.

[0032] In one feasible implementation, the self-testing fan power is the average power of the fan running at the self-testing fan speed for a preset single running time, and the initial power is the average power of the fan running at the initial speed for a preset single running time.

[0033] 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...

[0034] The self-test temperature and the initial temperature are the heat exchanger temperatures of the air conditioner.

[0035] 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.

[0036] A control device is provided according to a third aspect of the embodiments of this application, comprising:

[0037] Memory, which stores computer programs;

[0038] The processor executes the computer program;

[0039] 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.

[0040] According to a fourth aspect of the embodiments of this application, an air conditioner is provided, comprising:

[0041] The control device as described in the above technical solution.

[0042] Compared to existing technologies, the present invention offers at least the following advantages: The air conditioner control method provided in this application obtains the current fan speed of the air conditioner when it is in fan-only mode and determines it as the self-test fan speed. It also obtains the self-test fan power and self-test temperature of the air conditioner, where the self-test fan power is the fan power of the air conditioner at the self-test fan speed. Based on the initial power, initial temperature, initial speed, self-test fan power, and the self-test fan speed and temperature of the air conditioner, it determines the degree of dirt / clogging in the air conditioner, where the initial power is the fan power of the air conditioner when it first enters fan-only mode at the initial speed, 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 state changes within the indoor unit cavity on fan power changes, thereby improving the accuracy of dirt / clogging detection based on fan power. Meanwhile, under varying speed and temperature conditions, the accuracy of detecting filter clogging by considering the impact of changes in air temperature and speed on fan power is further improved. Furthermore, this method eliminates the need for additional hardware such as infrared sensors or photosensitive sensors to directly acquire information about filter clogging levels, thus saving on clogging detection costs. Additionally, since the parameters used to determine clogging status do not include fan motor drive parameters, the influence of control-related factors such as chip malfunctions and radiation interference on clogging detection is eliminated. Attached Figure Description

[0043] 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:

[0044] 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;

[0045] Figure 2 A structural block diagram of a computer-readable storage medium according to an embodiment of this application;

[0046] Figure 3 A schematic structural block diagram of a control device according to an embodiment of this application;

[0047] Figure 4 A schematic structural block diagram of an air conditioner according to an embodiment of this application. Detailed Implementation

[0048] 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.

[0049] like Figure 1 As shown, a control method for an air conditioner is proposed according to a first aspect of an embodiment of this application, comprising:

[0050] Step 101: When the air conditioner is in fan-only mode, obtain the current fan speed of the air conditioner and determine it as the self-test fan speed.

[0051] It is understandable that the aforementioned "air supply only" mode can be interpreted as a situation where the air conditioner is not performing cooling or heating, or where heat exchange occurs through the refrigerant. The self-checking fan speed can be the current speed within the achievable range of the fan motor, and is not limited here. The aforementioned air conditioner can be either the indoor unit of an air conditioner or a portable air conditioner, and is not limited here.

[0052] For example, the above-mentioned 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 example, it can be that the program is set to control the air conditioner to enter this fan-only mode for self-test under certain conditions, or it can be that it enters this fan-only mode for self-test based on the user's request.

[0053] Step 102: Obtain the self-test fan power and self-test temperature of the air conditioner. The self-test fan power is the fan power of the air conditioner at the self-test fan speed.

[0054] It is understandable that the self-tested fan power can be the fan power under the aforementioned conditions where 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.

[0055] For example, the self-test temperature mentioned above can be the operating temperature corresponding to the self-test fan power.

[0056] Step 103: Determine the degree of dirt or blockage in the air conditioner based on its initial power, initial temperature, initial speed, self-test fan power, self-test fan speed, and self-test temperature. The initial power is the fan power of the air conditioner when it first enters the fan-only mode at its initial speed, and the initial temperature is the operating temperature corresponding to the initial power.

[0057] 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 initial speed. The initial speed can be the current speed within the speed range that the fan motor can reach, and is not limited here.

[0058] 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.

[0059] It should be noted that motor power is affected by two variables: torque and speed. Torque is related to the load. Furthermore, since it can cause changes in load, the factors affecting the fan motor power can include operating conditions such as air temperature or humidity, as well as mechanical factors such as refrigerant flow and machine blockage.

[0060] The effect of air temperature on motor power can be determined through the following analysis:

[0061] The formula for calculating the air power of a ventilation fan is as follows:

[0062]

[0063] 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:

[0064] ΔP u ≈KΔρ (2)

[0065] 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: u It is directly proportional to the change in gas density Δρ.

[0066] On the other hand, the ideal gas law:

[0067] pV = nRT (3)

[0068] 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:

[0069]

[0070] The formula for calculating the density of dry air is:

[0071]

[0072] Combining equations (4) and (5), we have:

[0073]

[0074] 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.

[0075] The impact of air humidity on motor power can be determined through the following analysis:

[0076] 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.

[0077] The air conditioner dirt and clogging detection method provided in this application embodiment obtains the current fan speed of the air conditioner when it is in fan-only mode and determines it as the self-test fan speed. It also obtains the self-test fan power and self-test temperature, where the self-test fan power is the fan power of the air conditioner at the self-test fan speed. Based on the air conditioner's initial power, initial temperature, initial speed, self-test fan power, and self-test fan speed and temperature, the dirt and clogging status of the air conditioner is determined. The initial power is the fan power of the air conditioner when it first enters fan-only mode at the initial speed, 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 scheme 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, thereby improving the accuracy of dirt and clogging detection based on fan power. Furthermore, in cases of varying speed and temperature, the impact of changes in air temperature and speed on fan power is considered, further improving the accuracy of dirt and 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.

[0078] 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.

[0079] According to some embodiments, the above-described dirt and clogging detection method may further include:

[0080] The speed adjustment coefficient is determined based on the self-tested fan speed and the initial speed.

[0081] Adjust the self-test fan power according to the speed adjustment coefficient to obtain the comparison power.

[0082] For example, the comparison power is based on the influence of fan power caused by changes in rotational speed. Therefore, the comparison power can eliminate the influence of rotational speed on fan power, thereby improving the accuracy of detecting dirt and blockage by fan power.

[0083] According to some embodiments, the speed adjustment factor is the cube of the ratio of the self-tested fan speed to the initial speed.

[0084] For example, for a fan, the fan power ratio is approximately the cube of the speed ratio. Therefore, the speed adjustment coefficient can be the cube of the ratio of the self-tested fan speed to the initial speed. The comparison power obtained through the above speed adjustment coefficient can eliminate the influence of speed on fan power, thereby improving the accuracy of dirt and blockage detection based on fan power.

[0085] According to some embodiments, determining the degree of dirt / clogging in an air conditioner based on its initial power, initial temperature, initial speed, self-test fan power, self-test fan speed, and self-test temperature 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] 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;

[0088] Based on the initial power, comparative power, and temperature influence values, 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 u0 If the change in fan motor power is ΔP, then ΔP = P ux -P uo =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 blockage in an air conditioner can be determined based on the dirt blockage impact value ΔP0 on the fan power. Simultaneously, by comparing power as described above, the influence of rotational speed on fan power can be further eliminated, thereby improving the accuracy of dirt blockage detection based on fan power.

[0091] According to some embodiments, determining the degree of dirt / clogging in an air conditioner based on its initial power, initial temperature, initial speed, self-test fan power, self-test fan speed, and self-test temperature 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, the comparison power, and the temperature compensation value, the impact of dirt blockage on the fan power is determined to ascertain the degree of dirt blockage in the air conditioner. 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 impact 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 density, 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 the 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) / 2. x The temperature compensation scheme described above is relatively simpler, thus improving the efficiency of determining the condition of dirt blockage. Simultaneously, by comparing power, the influence of rotational speed on fan power is further eliminated, thereby improving the accuracy of dirt blockage detection based on fan power.

[0094] According to some embodiments, the above-mentioned method for detecting dirt and blockage in air conditioners may further include:

[0095] Calculate the fouling impact rate based on the fouling impact value and initial power;

[0096] 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.

[0097] 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.

[0098] According to some embodiments, the above-mentioned method for detecting dirt and blockage in air conditioners may further include:

[0099] Based on the total operating time of the air conditioner;

[0100] Obtaining the current fan speed of the air conditioner and determining it as the self-test fan speed can include:

[0101] When the total running time of the air conditioner reaches the preset total running time and the air conditioner is turned on again, the current fan speed of the air conditioner is obtained and determined as the self-test fan speed.

[0102] 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.

[0103] According to some embodiments, the self-test fan power is the average power of the fan running at the self-test fan speed for a preset single running time, and the initial power is the average power of the fan running at the initial speed for a preset single running time.

[0104] For example, the power of the fan at a certain 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 running at a certain speed for a preset single running time can be used as the above-mentioned self-test fan power and initial power. This can further improve the accuracy of dirt blockage detection.

[0105] 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.

[0106] 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.

[0107] The computer-readable storage medium 201 provided in this application embodiment acquires the current fan speed of the air conditioner when the air conditioner is in fan-only mode and determines it as the self-test fan speed. It also acquires the self-test fan power and self-test temperature of the air conditioner, where the self-test fan power is the fan power of the air conditioner at the self-test fan speed. Based on the initial power, initial temperature, initial speed, self-test fan power, and the self-test fan speed and self-test temperature of the air conditioner, it determines the degree of dirt / clogging in the air conditioner, where the initial power is the fan power of the air conditioner when it first enters fan-only mode at the initial speed, 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 state changes within the indoor unit cavity on fan power changes can be effectively avoided, thereby improving the accuracy of dirt / clogging detection based on fan power. Meanwhile, under varying speed and temperature conditions, the accuracy of detecting filter clogging by considering the impact of changes in air temperature and speed on fan power is further improved. Furthermore, this method eliminates the need for additional hardware such as infrared sensors or photosensitive sensors to directly acquire information about filter clogging levels, thus saving on clogging detection costs. Additionally, since the parameters used to determine clogging status do not include fan motor drive parameters, the influence of control-related factors such as chip malfunctions and radiation interference on clogging detection is eliminated.

[0108] It is understandable 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 with the refrigerant is occurring. The aforementioned self-test fan speed can be the current speed within the range achievable by the fan motor, and is not limited here. 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 a program setting 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.

[0109] It is understandable that the self-tested fan power refers to the fan power under the aforementioned conditions where the air conditioner is not cooling or heating and there is heat exchange with the refrigerant, and the fan speed is at the aforementioned fixed speed. The aforementioned fan power can be understood as the fan motor power. The aforementioned self-tested temperature can be the operating temperature corresponding to the self-tested fan power.

[0110] It is understood that the initial power mentioned above refers to the fan power when the air conditioner is first powered on and enters the aforementioned fan-only mode, assuming the fan speed reaches the initial speed. The initial speed can be the current speed within the speed range achievable by the fan motor, and is not limited here.

[0111] 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.

[0112] It should be noted that motor power is affected by two variables: torque and speed. Torque is related to the load. Furthermore, since it can cause changes in load, the factors affecting the fan motor power can include operating conditions such as air temperature or humidity, as well as mechanical factors such as refrigerant flow and machine blockage.

[0113] 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.

[0114] like Figure 3As 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.

[0115] The control device 300 provided in this application embodiment acquires the current fan speed of the air conditioner when the air conditioner is in fan-only mode and determines it as the self-test fan speed. It also acquires the self-test fan power and self-test temperature of the air conditioner, where the self-test fan power is the fan power of the air conditioner at the self-test fan speed. Based on the initial power, initial temperature, initial speed, self-test fan power, and self-test fan speed and temperature of the air conditioner, it determines the degree of dirt / clogging in the air conditioner, where the initial power is the fan power of the air conditioner when it first enters fan-only mode at the initial speed, 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 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 dirt / clogging detection based on fan power. Furthermore, in cases of varying speed and temperature, the influence of changes in air temperature and speed on fan power is considered, further improving 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.

[0116] It is understandable 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 with the refrigerant is occurring. The aforementioned self-test fan speed can be the current speed within the range achievable by the fan motor, and is not limited here. 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 a program setting 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.

[0117] It is understandable that the self-tested fan power refers to the fan power under the aforementioned conditions where the air conditioner is not cooling or heating and there is heat exchange with the refrigerant, and the fan speed is at the aforementioned fixed speed. The aforementioned fan power can be understood as the fan motor power. The aforementioned self-tested temperature can be the operating temperature corresponding to the self-tested fan power.

[0118] It is understood that the initial power mentioned above refers to the fan power when the air conditioner is first powered on and enters the aforementioned fan-only mode, assuming the fan speed reaches the initial speed. The initial speed can be the current speed within the speed range achievable by the fan motor, and is not limited here.

[0119] 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.

[0120] It should be noted that motor power is affected by two variables: torque and speed. Torque is related to the load. Furthermore, since it can cause changes in load, the factors affecting the fan motor power can include operating conditions such as air temperature or humidity, as well as mechanical factors such as refrigerant flow and machine blockage.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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 dirty clogging detection method of an air conditioner, characterized by, include: When the air conditioner is in the air-only mode, the current fan speed of the air conditioner is obtained and determined as the self-test fan speed. The air-only mode is when the air conditioner is not cooling or heating and there is heat exchange of 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 at the self-test fan speed; Based on the initial power, initial temperature, initial speed, self-test fan power, self-test fan speed, and self-test temperature of the air conditioner, the dirt and blockage status of the air conditioner is determined. The initial power is the fan power of the air conditioner when it first enters the air supply mode and operates at the initial speed. The initial temperature is the operating temperature corresponding to the initial power. The speed adjustment coefficient is determined based on the self-tested fan speed and the initial speed. The power of the self-testing fan is adjusted according to the speed adjustment coefficient to obtain the comparison power; The determination of the air conditioner's dirt / clogging status based on the air conditioner's initial power, initial temperature, initial speed, self-test fan power, self-test fan speed, 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 comparative power, and the temperature influence value, the impact of dirt blockage on the fan power is determined to ascertain the dirt blockage status of the air conditioner.

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

3. The method of claim 1, wherein, The speed adjustment coefficient is the cube of the ratio of the self-tested fan speed to the initial speed.

4. The method of claim 1, wherein, 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.

5. The method of claim 1, wherein, Also includes: Based on the total operating time of the air conditioner; The step of obtaining the current fan speed of the air conditioner and determining it as the self-test fan speed 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 current fan speed of the air conditioner is obtained and determined as the self-test fan speed.

6. The method of claim 1, wherein, The self-test fan power is the average power of the fan running at the self-test fan speed for a preset single running time, and the initial power is the average power of the fan running at the initial speed for a preset single running time.

7. The method of claim 1, wherein, The self-test temperature and the initial temperature are the indoor temperatures of the air conditioner in the air-only mode, or... The self-test temperature and the initial temperature are the heat exchanger temperatures of the air conditioner.

8. 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 7.

9. A control device characterized by comprising: include: Memory, which stores computer programs; The processor executes the computer program; 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 7.

10. An air conditioner characterized by comprising: include: The control device as described in claim 9.

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