CN111878969B - Filter screen filth blockage detection control method and device, air conditioner and readable storage medium - Google Patents

Filter screen filth blockage detection control method and device, air conditioner and readable storage medium Download PDF

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Publication number
CN111878969B
CN111878969B CN202010447671.8A CN202010447671A CN111878969B CN 111878969 B CN111878969 B CN 111878969B CN 202010447671 A CN202010447671 A CN 202010447671A CN 111878969 B CN111878969 B CN 111878969B
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filth blockage
filter screen
grade
air conditioner
blockage
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CN111878969A (en
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卓森庆
李发顺
陈红
谭志凯
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/40—Damper positions, e.g. open or closed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a filter screen filth blockage detection control method, a filter screen filth blockage detection control device, an air conditioner and a computer readable storage medium. According to the invention, on the basis of not increasing the hardware cost, the dirty blockage misjudgment caused by object shielding, manual change of the wind sweeping angle and the like is eliminated through the dirty blockage grade change rate, and the accuracy and the reliability of the filter screen dirty blockage detection are further improved.

Description

Filter screen filth blockage detection control method and device, air conditioner and readable storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to a filter screen filth blockage detection control method and device, an air conditioner and a readable storage medium.
Background
In recent years, with the trend of higher consumption patterns, more and more air conditioners have more intelligent functions. As a filter screen which is one of important parts of an air conditioner indoor unit, the performance of the air conditioner is seriously affected by the filth blockage condition of the filter screen, even secondary pollution such as overproof indoor microorganisms can be caused by the bred bacteria, and the filter screen needs to be cleaned at variable time according to the condition. Therefore, the filth blockage detection of the filter screen of the air conditioner indoor unit is the hot door direction of the current air conditioner industry.
In most cases, the filth blockage condition of the filter screen is judged according to time, a user needs to manually send a control instruction, and the control instruction almost completely depends on the subjectivity of a client; in addition, a part of the air pressure sensor or the air outlet or the air duct is additionally provided with a wind pressure meter to judge the filth blockage condition of the filter screen, but extra hardware needs to be added, and extra cost is increased. In addition, dirty blockage judgment is also performed partially according to parameters in the air conditioner operation process; for example, CN109357360A discloses a method for detecting filth blockage of an air conditioner filter, wherein if the number of times of power on/off reaches a preset number, the current calculated value is analyzed and calculated for the driving information by setting the rotation speed of an internal fan and detecting the driving information of an air deflector at each position, and the filth blockage condition of the filter is determined by calculating a filth blockage degree value of the filter according to the current calculated value and a preset reference value. The method for judging filth blockage of the filter screen takes the operation parameter of the air conditioner under the instantaneous working condition as a judgment basis, does not consider the time dimension, and is easy to cause filth blockage misjudgment.
Disclosure of Invention
The invention solves the problem that dirty blockage error judgment is easily caused by depending on the air conditioner operation parameters under the instantaneous working condition, for example, dirty blockage error judgment is caused by object shielding or dirty blockage error judgment is caused by artificially changing the wind sweeping angle.
In order to solve the problems, the invention provides a filter screen filth blockage detection control method, which is used for detecting the torque and the rotating speed of a fan and obtaining the filth blockage grade Z of the filter screen according to a model[n]And calculating the rate of change d of the filth blockage levelZ[n]Judging the filth blockage condition of the filter screen according to the relation between the current data and a preset value; and the filth blockage misjudgment caused by object shielding or artificial change of the wind sweeping angle is eliminated according to the filth blockage grade change rate, and the accuracy of filth blockage prompt is improved. The torque data of the fan in the air conditioner can be obtained through indirect calculation of other data such as torque current, motor driver temperature rise and the like.
Further, the method comprises the following steps: s1: air conditioner is started up at t[n-1]Detecting the rotating speed and the torque of the fan; s2: at tnDetecting the rotating speed and the torque of the fan and recording the filth blockage grade Z according to a first model[n]And calculates the rate of change d of the filth blockage levelZ[n](ii) a S3: judgment of dZ[n]Whether it is greater than threshold value Th1If yes, go to step S4; if not, according to Z[n]Threshold value Th of visceral congestion2Carrying out filth blockage alarm according to the size relationship; s4: sending an abnormal alarm to a superior controller; s5: modifying the first model into a second model by subtracting the dirty block variation d from the dirty block level data in the model of FIG. 2Z[n]At t[n]Detecting the rotating speed and the torque of the fan in time, recording the current filth blockage grade according to a second model and calculating the filth blockage grade change rate dZ[n]Returning to step S3. Compared with the prior art, the method and the device for judging the filth blockage of the air conditioner filter screen can quantitatively distinguish filth blockage conditions of the air conditioner filter screen by calculating the filth blockage grade, and are convenient to use and maintain by aiming at treating if the filth blockage conditions are not filth blockage, slight filth blockage, medium filth blockage and serious filth blockage, so that the user satisfaction is improved.
The relationship between the dirty level and the torque and the rotating speed, which is normalized without considering the time dimension, is approximately linear as shown in fig. 2, and the graph data can be obtained by a preset dirty experiment. Normally, the running state of the fan in the air conditioner is on the plane in fig. 2, and the overall trend is as follows: under the same rotating speed, the smaller the torque is, the more serious the filth blockage condition is; with the same torque, a greater rotational speed indicates a more severe fouling condition. When an object suddenly blocks an air inlet of an indoor unit of the air conditioner, the rotating speed or the torque of the internal fan has a sudden change, so that a judgment result of the filth blockage level has a sudden change, as shown in fig. 3. If the filth blockage level is still judged according to the judgment standard of the figure 2, the misjudgment is caused, and the filth blockage is prompted too early. Considering that the filth blockage grade of the filter screen of the indoor unit of the air conditioner is slowly improved in actual use, the filth blockage is judged to be caused by foreign matter blockage or manual change of the wind sweeping angle instead of filth blockage. Meanwhile, the variation of the filth blockage level in fig. 3 is compensated to be re-corrected into the shape shown in fig. 4, so that the normal judgment of the filth blockage level is restored. If the correction is not carried out, in the subsequent or next period of filth blockage judgment, the rate of change of the filth blockage grade returns to normal, but the filth blockage grade is still maintained to be higher, and the filth blockage error judgment is still formed.
Further, in step S3: according to Z[n]Threshold value Th of visceral congestion2The specific dirty blockage warning for the relationship of the sizes is as follows: judgment of Z[n]Whether or not it is greater than the threshold value Th2If yes, performing filth blockage alarm and returning to the step S2; if not, the process returns to step S2. The Th2Can be any value of 2, 4, 6, 8 and the like, and can be set according to specific application scenes, for example, Th in a laboratory or office area with high air quality requirement2A smaller value, e.g., 4 or 6; th in a workshop with large dust2The value is relatively large, such as 6 or 8, and the like, so that the production requirement can be met, and the frequent cleaning is reduced. The filth blockage alarm can be prompted by flashing an air conditioner display screen or displaying an error code or by a buzzer through buzzing with certain frequency and times.
Further, d in steps S2 and S5Z[n]＝(Z[n]-Z[n-1])/(t[n]-t[n-1]) Wherein Z is[n-1]Is t[n-1]The corresponding filth level. Wherein t is[n]、t[n-1]The interval between the filter screen and the filter screen is set according to a specific application scene, so that the accuracy of judging filth blockage of the filter screen is improved, and meanwhile, frequent abnormal prompt is avoided.
Further, in step S2, after the power-on, the first operation is performed, and Z is set[n-1]＝Zlast，t[n-1]＝TlastWherein Z islastThe last detected filth blockage grade before the last shutdown; t islastAnd setting detection time for calculating the dirty blockage grade change rate of the last shutdown and the current startup according to an empirical value.
Further, the abnormal alarm in step S4 includes a foreign object jam and/or a manual adjustment of the wind sweeping angle. Similarly, the change of the wind sweeping angle by hand can cause the change of the shape of the wind channel of the wind outlet and cause the change of wind resistance, thereby influencing the torque and carrying out the misjudgment of the algorithm for judging the dirty blockage grade by simply judging the torque. The abnormal alarm can be any prompting mode except a filth blockage alarm.
Compared with the prior art, the filter screen filth blockage detection control method has the following advantages: (1) according to the invention, the time dimension is added in the filth blockage grade judgment model, so that foreign matter blockage (or manual change of the wind sweeping angle) and filter screen filth blockage can be effectively distinguished; (2) hardware equipment does not need to be added, the cost is low, and the accuracy of judging the filth blockage of the filter screen is high; (3) the intelligent degree of the air conditioner is improved, and the user experience is good.
The invention also provides a filter screen filth blockage detection control device of the air conditioner, which comprises: the detection unit is used for detecting the rotating speed and the torque of the current fan; the calculation unit is used for calculating a filth blockage grade and a filth blockage grade change rate corresponding to the current air conditioner filter screen according to the rotating speed and the torque; the calculation unit is also used for correcting the first model into a second model according to the filth blockage grade variation; and the control unit is used for alarming whether the air conditioner filter screen is dirty or abnormal in dirty judgment according to the dirty grade and the dirty grade change rate.
The invention also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the filth blockage detection control method.
The invention also provides a computer readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the dirty block detection control method is realized. The structure has the same beneficial effects as the filter screen filth blockage detection control method, and the detailed description is omitted.
Drawings
Fig. 1 is a schematic flow chart of a filter screen filth blockage detection control method according to an embodiment of the present invention;
FIG. 2 is a graph of the relationship between the fouling level and the torque and speed in the first model under normal conditions;
FIG. 3 is a graph showing the relationship between the level of contamination and the torque and rotational speed in an abnormal situation;
fig. 4 is a graph showing the relationship between the dirt-clogging level, the torque, and the rotational speed in the second model after the correction.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Example 1
As shown in figure 1, the filter screen filth blockage detection control method comprises the steps of detecting the torque and the rotating speed of a fan, and obtaining the filth blockage grade Z of the filter screen according to a model[n]And calculating the rate of change d of the filth blockage levelZ[n]And judging the filth blockage condition of the filter screen according to the relation between the current data and the preset value, thereby eliminating the filth blockage misjudgment caused by object shielding or artificial change of the wind sweeping angle and improving the accuracy of filth blockage prompt. The method specifically comprises the following steps:
s1: air conditioner is started up at t[n-1]Detecting the rotating speed and the torque of the fan;
s2: at t[n]Detecting the rotating speed and the torque of the fan and recording the filth blockage grade Z according to a first model[n]And calculates the rate of change d of the filth blockage levelZ[n]Step S4 is performed; wherein t is[n]、t[n-1]Setting according to a specific application scene;
if the detection is carried out for the first time after the startup, Z is set[n-1]＝Zlast，t[n-1]＝TlastWherein Z islastThe last detected filth blockage grade before the last shutdown; t islastAnd setting detection time for calculating the dirty blockage grade change rate of the last shutdown and the current startup according to an empirical value.
The filth blockage grade data is acquired by adopting the following method: the fixed fan runs at 200RPM, and ends at 1600RPM with an interval of 200 RPM; covering the filter screen with covers with different thicknesses at each rotating speed to simulate filth blockage, and simultaneously recording filth blockage grades (0-10 grades) and torque currents (0-2A) of corresponding covers to obtain filth blockage data in the table 1; the rotation speed, torque current, and dirty level were normalized using 1500RPM, 2A, and 10, respectively, to obtain the model of fig. 2.
TABLE 1
Figure GDA0003122372730000051
Figure GDA0003122372730000061
S3: judgment of dZ[n]Whether it is greater than threshold value Th1If yes, go to step S4; if not, according to Z[n]Threshold value Th of visceral congestion2Carrying out filth blockage alarm according to the size relationship; specifically, judgment of Z[n]Whether or not it is greater than the threshold value Th2If yes, performing filth blockage alarm and returning to the step S2; if not, the process returns to step S2. Wherein the visceral congestion threshold value Th2Can be any value of 2, 4, 6, 8 and the like, can be set according to specific application scenes,
s4: if the filth blockage of the filter screen is abnormal, an abnormal alarm is sent out and is sent to the superior controller for processing. The torque data of the fan in the air conditioner can be obtained through indirect calculation of other data such as torque current, motor driver temperature rise and the like. The filter screen filth blockage abnormity comprises foreign matter blockage and/or manual adjustment of a wind sweeping angle.
S5: modifying the first model into a second model by subtracting the dirty block variation d from the dirty block level data in the model of FIG. 2Z[n]At t[n]Detecting the rotating speed and the torque of the fan in time, recording the current filth blockage grade according to a second model and calculating the filth blockage grade change rate dZ[n]Returning to step S3.
A filth blockage detection control device for a filter screen of an air conditioner comprises: the detection unit is used for detecting the rotating speed and the torque of the current fan; the calculation unit is used for calculating a filth blockage grade and a filth blockage grade change rate corresponding to the current air conditioner filter screen according to the rotating speed and the torque; the calculation unit is also used for correcting the first model into a second model according to the filth blockage grade variation; and the control unit is used for alarming whether the air conditioner filter screen is dirty or abnormal in dirty judgment according to the dirty grade and the dirty grade change rate. An air conditioner comprises a computer readable storage medium and a processor, wherein the computer readable storage medium stores a computer program, and the computer program is read by the processor and runs to realize the filth blockage detection control method. A computer-readable storage medium storing a computer program which, when read and executed by a processor, implements the above-described filth detection control method.
Example 2
A filter screen filth blockage detection control method comprises the following steps:
s1, starting the air conditioner, and calculating the filth blockage level at the starting time according to the torque and the rotating speed of the internal fan;
s2, calculating and recording the current filth blockage grade Z according to the rotating speed and the torque of the fan and the graph 2 at certain intervals[n]And the running time t of the starting up[n]If the operation is started for the first time, setting Z[n-1]＝Zlast，t[n-1]＝Tlast(ii) a Wherein Z[n]Is according to t[n]Obtaining filth blockage grades by the fan rotating speed and the torque at each moment; zlast: the last detected filth blockage grade before the last shutdown; t islast: setting an empirical value for the detection time of the dirty blocking grade change rate of the previous shutdown and the current startup; and using the formula dZ[n]＝(Z[n]-Z[n-1])/(t[n]-t[n-1]) And calculating the dirty blockage grade change rate.
S3, judging whether the dirty blockage grade change rate is larger than a threshold value Th1If yes, go to step S4; if not, go to step S6; wherein Th1And according to the empirical setting, the method is related to the model, the installation position, the operation environment, such as 0.5, 1.5, 3.5 and the like.
S4, judging that the foreign body is blocked, reporting a warning of the foreign body blockage (manual air sweeping), and handing the warning to a superior controller for processing;
s5, the first model is corrected to be a second model, namely the dirty blockage grade data in the original model is subtracted by the dirty blockage variable Z[n]-Z[n-1]Generating a second model as shown in fig. 4, and replacing fig. 2;
s6, judgment Z[n]Whether or not it is greater than the threshold value Th2If yes, performing filth blockage alarm and returning to the step S2; if not, the process returns to step S3.
Example 3
A filter screen filth blockage detection control method comprises the following steps:
s1: starting the air conditioner, and detecting the rotating speed and the torque of the fan when the air conditioner is started for 3min, wherein if the rotating speed and the torque are respectively 1000rpm and 1.9A, the corresponding filth blockage grade is 2;
s2: at this point, at 5min, the fan speed and torque are detected, for example 1600rpm, 1.0A, and a dirty level 6 is recorded according to the first model and the dirty level rate of change d is calculatedZ[n]Is 2;
s3: when d isZ[n]2 being greater than a threshold value, e.g. Th1If the alarm is 1.5, an abnormal alarm is sent out and is processed by the superior controller;
s4; correcting the first model into a second model (subtracting the filth blockage variation 4), detecting the rotating speed and the torque of the fan at 7min, such as 1600rpm and 0.3A, recording the current filth blockage grade 4 (namely subtracting the filth blockage variation 4 from the filth blockage grade 8 obtained from the data in the table 1) according to the second model, and calculating the filth blockage grade variation rate dZ[n]＝1；
S5: at this time d Z[n]1 is less than threshold Th11.5, according to Z[n]And a visceral congestion threshold value Th2Performing filth blockage alarm according to the magnitude relation; e.g. Th2When the value is 5, then Z[n]Less than Th2The increase of the dirty blocking grade is caused by foreign matter blocking and/or manual adjustment of the wind sweeping angle, but not by the dirty blocking of the filter screen, so that the misjudgment is reduced.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. A filter screen filth blockage detection control method is characterized in that normalization processing is carried out on rotating speed, torque current and filth blockage grade to obtain a first model, and the filth blockage condition of a filter screen is judged according to the relation between current data and a preset value, and comprises the following steps:
s1: air conditioner is started up at t[n-1]Detecting the rotating speed and the torque of the fan;
s2: after a certain time, at tnDetecting the rotating speed and the torque of the fan at any moment and recording the filth blockage grade Z according to a first model[n]And calculates the rate of change d of the filth blockage levelZ[n]；
S3: judgment of dZ[n]Whether it is greater than threshold value Th1If yes, go to step S4; if not, according to Z[n]And a visceral congestion threshold value Th2Carrying out filth blockage alarm according to the size relationship;
s4: sending an abnormal alarm to be processed by a superior controller, wherein the abnormal alarm comprises foreign matter blockage and/or manual adjustment of a wind sweeping angle;
s5: modifying the first model to a second model at t[n]Detecting the rotating speed and the torque of the fan in time, recording the current filth blockage grade according to a second model and calculating the filth blockage grade change rate dZ[n]Returning to step S3.
2. A method for detecting clogging of a filter screen according to claim 1, wherein in step S3, the method is based on Z[n]And a visceral congestion threshold value Th2The specific steps for carrying out the filth blockage alarm by the aid of the size relationship are as follows: judgment of Z[n]Whether or not it is greater than the threshold value Th2If yes, performing filth blockage alarm and returning to the step S2; if not, the process returns to step S2.
3. A method for detecting clogging of a filter screen according to claim 1, wherein d in steps S2 and S5Z[n]＝(Z[n]-Z[n-1])/(t[n]-t[n-1]) Wherein Z is[n-1]Is t[n-1]And the corresponding filth blockage grade of the air conditioner.
4. Filter screen fouling detection according to claim 1The control method is characterized in that in step S2, the first operation is carried out after the start-up, and Z is set[n-1]＝Zlast，t[n-1]＝TlastWherein Z islastThe last detected filth blockage grade before the last shutdown; t islastAnd setting detection time for calculating the dirty blockage grade change rate of the last shutdown and the current startup according to an empirical value.
5. A filter screen filth blockage detection control device of an air conditioner, which is used for realizing the filter screen filth blockage detection control method of any one of claims 1 to 4, and is characterized by comprising the following steps:
the detection unit is used for detecting the rotating speed and the torque of the current fan;
the calculation unit is used for calculating a filth blockage grade and a filth blockage grade change rate corresponding to the current air conditioner filter screen according to the rotating speed and the torque;
the calculation unit is also used for correcting the first model into a second model according to the filth blockage grade variation;
and the control unit is used for alarming whether the air conditioner filter screen is dirty or abnormal in dirty judgment according to the dirty grade and the dirty grade change rate.
6. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the method according to any one of claims 1 to 4.
7. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the method according to any one of claims 1-4.
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