CN112484235B - Filter screen filth blockage detection method of air conditioner and air conditioner - Google Patents

Filter screen filth blockage detection method of air conditioner and air conditioner Download PDF

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Publication number
CN112484235B
CN112484235B CN202011290190.7A CN202011290190A CN112484235B CN 112484235 B CN112484235 B CN 112484235B CN 202011290190 A CN202011290190 A CN 202011290190A CN 112484235 B CN112484235 B CN 112484235B
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air conditioner
detection
filth blockage
running time
filter screen
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CN112484235A (en
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连彩云
吴俊鸿
廖敏
翟振坤
田雅颂
梁之琦
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • 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
    • F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F24F2110/22—Humidity of the outside air

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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  • Air Conditioning Control Device (AREA)

Abstract

The invention provides a filth blockage detection method for a filter screen of an air conditioner and the air conditioner, wherein the method comprises the following steps: acquiring reference operation data of the air conditioner in a historical time period; acquiring detection operation data of the air conditioner; correcting the detection operation data based on the reference operation data to obtain a corrected fan load parameter of the air conditioner; and calculating the ratio of the corrected fan load parameter to a preset standard fan load parameter, and estimating the filth blockage area of the filter screen of the air conditioner according to the ratio. Based on the method provided by the invention, the operation parameters of the air conditioner in actual operation are corrected by the operation data of the air conditioner in normal operation to obtain the corrected fan load parameters, and the corrected fan load parameters are compared with the preset standard fan load parameters to judge the filthy and blockage area of the filter screen, so that the accuracy of filthy and blockage judgment of the filter screen is improved.

Description

Filter screen filth blockage detection method of air conditioner and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a filter screen filth blockage detection method of an air conditioner and the air conditioner.
Background
The air conditioning system continuously exchanges heat with indoor circulating air through the indoor unit heat exchanger to realize the control of the temperature and humidity regulation of the indoor air.
Because the air often contains suspended solids such as hair, dust, so the chance sets up the filter screen in the air conditioner and filters air impurity, avoids the heat exchanger to be blockked and influences the heat exchange efficiency of heat exchanger. In the long-term use of air conditioner, the filter screen can be hard to avoid accumulating thicker dust, if dirty stifled degree is comparatively serious, can reduce the air output and the heat transfer volume of air conditioner on the one hand, influences the performance of air conditioner. In addition, bacterial microorganisms are easily bred at filthy and blocked positions of the filter screen, indoor air quality is affected through air outlet of the air conditioner, and health of a user is affected. Therefore, it is very important that the filter screen is cleaned immediately.
At present, a filter screen filth blockage detection method of an air conditioner mainly comprises the steps of monitoring parameters such as current, temperature and rotating speed of an inner fan motor, but the detection means do not consider actual working conditions such as indoor and outdoor environment temperature or air outlet temperature and the like, and the influence of factors such as motor aging and the like, so that error protection is easy to occur in the actual application process.
Disclosure of Invention
In view of the above problems, the present invention provides a method for detecting filth clogging of a filter screen of an air conditioner and an air conditioner, which overcome or at least partially solve the above problems.
According to an aspect of the present invention, there is provided a filter screen filth blockage detecting method for an air conditioner, including:
acquiring historical operating data of the air conditioner in a historical time period;
acquiring detection operation data of the air conditioner;
correcting the detection operation data based on the historical operation data to obtain a corrected fan load parameter of the air conditioner;
and calculating the ratio of the corrected fan load parameter to a preset standard fan load parameter, and estimating the filth blockage area of the filter screen of the air conditioner according to the ratio.
Optionally, before acquiring the historical operation data of the air conditioner in the historical time period, the method further includes:
recording the running time of the air conditioner at each starting time in a historical time period;
acquiring the accumulated running time of the air conditioner for judging whether the filter screen is dirty or not for the first time by the air conditioner based on the starting time, and taking the accumulated running time as a first accumulated running time;
acquiring the running time of the air conditioner after each starting as the starting running time;
judging whether the first accumulated running time is greater than a first preset accumulated running time, judging whether the starting running time of the air conditioner after each starting is greater than a preset starting running time and/or judging whether a preset fault type does not occur in each starting of the air conditioner;
and if at least one judgment result is yes, executing the step of acquiring the historical operating data of the air conditioner.
Optionally, before the obtaining the detection operation data of the air conditioner, the method further includes:
acquiring the total accumulated operation time of the air conditioner as a second accumulated operation time;
judging whether the second accumulated operation time is greater than a second preset accumulated operation time or not;
and if so, executing the step of acquiring the detection operation data of the air conditioner.
Optionally, the historical operating data includes at least one of a reference inner fan wind gear, a reference indoor unit motor parameter, a reference inner pipe temperature, a reference indoor temperature, a reference outdoor humidity, and a reference indoor humidity; the reference indoor unit motor parameter comprises at least one of reference current, reference voltage, reference motor temperature and reference duty ratio PWM;
the detection operation data comprises detection of an inner fan wind gear, detection of inner pipe temperature, detection of indoor temperature, detection of outdoor humidity, detection of indoor humidity and detection of indoor unit motor parameters; the detection of the parameters of the motor of the indoor unit comprises at least one of detection of current, detection of voltage, detection of motor temperature, detection of duty ratio PWM and detection of accumulated running time of the motor.
Optionally, the correcting the detected operation data based on the historical operation data to obtain a corrected fan load parameter of the air conditioner includes:
acquiring a filth blockage judgment standard current of the air conditioner based on the following formula;
Figure GDA0003511195680000021
wherein d (t)Detecting the accumulated running time of the motor)＝k1×tDetecting the accumulated running time of the motor 2+k2×tDetecting the accumulated running time of the motor+k3；
a. b, c, e, k1, k2, k3 are all constants.
Optionally, the correcting the detected operation data based on the historical operation data to obtain a corrected fan load parameter of the air conditioner includes:
acquiring a filth blockage judgment standard current of the air conditioner based on the following formula;
Istandard current for judging filth blockage＝ICurrent of fan+ΔIDirty blockage judgment standard correction current
Figure GDA0003511195680000031
Wherein, κ (t)Detecting the accumulated running time of the motor)＝μ×tDetecting the accumulated running time of the motor 2+ν×tDetecting the accumulated running time of the motor+π；
Alpha, beta and gamma are constants.
Optionally, calculating a ratio of the corrected fan load parameter to a preset standard fan load parameter, and estimating a filth blockage area of a filter screen of the air conditioner according to the ratio, includes:
and calculating a current ratio of the filth blockage judgment standard current to a preset initial filth blockage standard current, and estimating the filth blockage area of the filter screen of the air conditioner according to the current ratio.
Optionally, after calculating a ratio of the corrected fan load parameter to a preset standard fan load parameter and estimating a filth blockage area of a filter screen of the air conditioner according to the ratio, the method further includes:
judging whether the filth blockage area of the filter screen is larger than a preset area or not;
if so, sending first prompt information for prompting a user to clean the filter screen;
the first prompt information comprises at least one of displaying a filth blockage mark on a display screen of the indoor unit of the air conditioner, lighting a filth blockage prompt lamp, playing buzzer sound prompt, playing voice prompt and displaying the filth blockage mark on a remote controller.
Optionally, the method further comprises:
acquiring the prompting times of the first prompting information, and judging whether the prompting times of the first prompting information is greater than a preset time;
if yes, sending out second prompt information;
the second prompt information comprises at least one of displaying a filth blockage mark on a display screen of the indoor unit, lighting a filth blockage prompt lamp and displaying the filth blockage mark by a remote controller.
According to another aspect of the present invention, there is also provided an air conditioner including:
the indoor unit is internally provided with a filter screen;
and the controller is used for executing the filter screen filth blockage detection method of the air conditioner.
The invention provides a filter screen filth blockage detection method of an air conditioner and the air conditioner, in the air conditioner filth blockage detection method provided by the invention, the operation data of the air conditioner in normal operation is monitored as the standard fan load parameter for filth blockage judgment of the filter screen, the current air conditioner operation parameter is monitored after the filter screen filth blockage detection process is carried out, the operation parameter of the air conditioner in actual operation is corrected by the operation data of the air conditioner in normal operation to obtain the corrected fan load parameter, and the corrected fan load parameter is compared with the preset standard fan load parameter to realize filth blockage area judgment of the filter screen, so that the filth blockage judgment accuracy of the filter screen is improved.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a schematic flow chart illustrating a method for detecting filth blockage of a filter screen of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic flow chart illustrating a method for detecting filth blockage of a filter screen of an air conditioner according to another embodiment of the present invention;
fig. 3 shows a schematic structural view of an air conditioner according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
An embodiment of the present invention provides a method for detecting filth blockage of a filter screen of an air conditioner, as shown in fig. 1, the method may at least include the following steps S101 to S104.
Step S101, historical operation data of the air conditioner in a historical time period is acquired.
In this embodiment of the present invention, when the historical operating data is obtained in step S102, the historical operating data may include:
s1, recording the running time of the air conditioner at each start in the historical time period;
s2, acquiring the accumulated running time of the air conditioner for the first time, wherein the accumulated running time is used as a first accumulated running time; for example, the air conditioner may keep timing after being powered on, and may record the accumulated running time after the air conditioner is installed as the first accumulated running time, or may record the current powering on running time as the first accumulated running time.
S3, acquiring the running time of the air conditioner after each starting as the starting running time;
s4, judging whether the first accumulated running time is larger than a first preset accumulated running time, judging whether the starting running time of the air conditioner after each starting is larger than a preset starting running time and/or judging whether a preset fault type does not occur in each starting of the air conditioner;
and S5, if at least one judgment result is yes, executing the step of obtaining the historical operation data of the air conditioner. In an alternative embodiment of the present invention, in order to ensure the accuracy and efficiency of the detection result, the step of obtaining the historical operating data of the air conditioner may be performed when each of the determination results in step S4 is yes. Assuming that a result of the determination in step S4 is no, the subsequent step of acquiring the historical operation data of the air conditioner is not performed. In practical applications, if there is a case where the corresponding parameters are different during the startup operation, the parameters in step S4 when the three conditions are simultaneously satisfied may be used as the criteria.
In the embodiment of the invention, when the air conditioner is operated for a period of time in an accumulated mode, the normal operation time of the air conditioner in each starting is not lower than the preset starting operation time, and the preset fault type does not occur, such as the shutdown fault related to an indoor fan motor, the current operation parameters of the air conditioner can be recorded as historical operation data, and based on the historical operation data, the obtained historical operation data of the air conditioner can be ensured to be obtained when the air conditioner is operated normally and the filter screen is in a clean state, so that the effective reasonability of the reference data is ensured. The first accumulated running time and the preset startup running time may be set according to different requirements, which is not limited in the present invention.
Optionally, the historical operating data includes at least one of a reference inner fan wind level, a reference indoor unit motor parameter, a reference inner pipe temperature, a reference indoor temperature, a reference outdoor humidity, and a reference indoor humidity; the reference indoor unit motor parameter includes at least one of a reference current, a reference voltage, a reference motor temperature, and a reference duty ratio, and of course, in an actual process, other types of data may be acquired as historical operating data, which is not limited in the present invention.
The embodiment of the invention is explained by taking the current of the fan of the indoor unit as an example, wherein the reference inner pipe temperature is equivalent to the current air outlet temperature of the indoor unit, and the influence of the air outlet temperature on the load of the fan can be reflected. Reference current I0Reference voltage U0Reference motor temperature T0Reference duty cycle PMW0And the air conditioner motor parameters can reflect the current fan load.
And step S102, acquiring detection operation data of the air conditioner.
The detection operation parameters of the air conditioner are the operation parameters of the air conditioner when the condition of filth blockage in the air conditioner needs to be judged. Optionally, detecting the operation data may include detecting an inner fan damper, detecting an inner pipe temperature, detecting an indoor temperature, detecting an outdoor humidity, detecting an indoor humidity, and detecting an indoor unit motor parameter; detecting the parameters of the motor of the indoor unit comprises at least one of detecting current, detecting voltage, detecting the temperature of the motor, detecting the duty ratio PWM and detecting the accumulated running time of the motor. In an actual process, other types of data may also be acquired as the detection operation data, which is not limited in the present invention.
Alternatively, before the above step S102, an accumulated operation time of the air conditioner may also be acquired as the second accumulated operation time, which may be an accumulated time of the air conditioner since the air conditioner was initially operated. Further, whether the second accumulated operation time is greater than a second preset accumulated operation time is judged; and if so, executing the step of acquiring the detection operation data of the air conditioner.
That is, in the embodiment of the present invention, only when the accumulated operation time of the air conditioner is determined to exceed a certain time length, the filth blockage condition of the filter screen of the air conditioner is determined, so that the waste of calculation resources due to unnecessary determination is avoided, and thus, the energy consumption is reduced. The second preset accumulated running time may be set according to different requirements, which is not limited in the present invention.
And step S103, correcting the detection operation data based on the historical operation data, and acquiring a corrected fan load parameter of the air conditioner.
In an optional embodiment of the present invention, the corrected fan load parameter of the air conditioner may include a filth blockage determination standard current of the air conditioner, and the filth blockage determination standard current of the air conditioner may be obtained in the following two ways:
the first method is as follows:
Figure GDA0003511195680000061
wherein d (t)Detecting the accumulated running time of the motor)＝k1×tDetecting the accumulated running time of the motor 2+k2×tDetecting the accumulated running time of the motor+k3；
a. b, c, e, k1, k2, k3 are all constants. As an optional manner, the value ranges of the parameters mentioned in this embodiment are as follows: a. b, c e-100, k1, k2 e-200, e, k3 e-1000, 1000; alpha, beta, gamma E-1000, 1000.
The second method comprises the following steps:
Istandard current for judging filth blockage＝ICurrent of fan+ΔIDirty blockage judgment standard correction current
Figure GDA0003511195680000062
Wherein, κ (t)Detecting the accumulated running time of the motor)＝μ×tDetecting motor accumulationsRun time 2+ν×tDetecting the accumulated running time of the motor+π；
Alpha, beta and gamma are constants.
Alternatively, κ is related to the cumulative operating time of the motor (indoor unit motor), and can also be determined by the following table:
Figure GDA0003511195680000071
it should be noted that, in the embodiment of the present invention, the accumulated operating time t of the indoor motorCumulative operating time of motorAnd (4) not clearing, and recording accumulation all the time.
In the two methods for obtaining the filth blockage judgment standard current, the first method is obtained by a proportional correction method, the second method is obtained by a linear correction method, and the two correction methods are selected according to design requirements, which is not limited by the invention.
And step S104, calculating the ratio of the corrected fan load parameter to a preset standard fan load parameter, and estimating the filth blockage area of the filter screen of the air conditioner according to the ratio.
After the corrected fan load parameter is obtained, the ratio of the corrected fan load parameter to the preset standard fan load parameter may be calculated, in the above embodiment, the corrected fan load parameter may be a dirty blockage judgment standard current, the corresponding preset standard fan load parameter may be an initial dirty blockage standard current, correspondingly, when the dirty blockage area of the filter screen is determined in the above step S104, the current ratio of the dirty blockage judgment standard current to the preset initial dirty blockage standard current may be calculated, and the dirty blockage area of the filter screen of the air conditioner may be estimated according to the current ratio. That is, the corrected parameter and the standard fan load parameter are (I)Standard current for judging filth blockage/IInitial filth blockage standard current 0) And comparing to judge the specific filth blockage area of the filter screen.
In the optional embodiment of the present invention, the dirty blocking areas corresponding to different ratio sizes are different, and the specific classification may be as follows:
i, when (I)Filth blockageJudging the standard current/IInitial filth blockage standard current 0) When the filter screen is less than or equal to 1, the filter screen is basically clean;
ii, when 1 < (I)Standard current for judging filth blockage/IInitial filth blockage standard current 0)≤ω1When the filter screen is in use, the filthy blockage area of the filter screen is delta A and is less than 20 percent;
iii, when ω1＜(IStandard current for judging filth blockage/IInitial filth blockage standard current 0)≤ω2When the area of filth blockage of the filter screen is less than or equal to 40 percent (delta A) and 20 percent (percentage);
iv when ω2＜(IStandard current for judging filth blockage/IInitial filth blockage standard current 0)≤ω3When the area of filth blockage of the filter screen is more than 40% and less than or equal to 60% of delta A;
v when ω3＜(IStandard current for judging filth blockage/IInitial filth blockage standard current 0)≤ω4When the area of filth blockage of the filter screen is more than 60% and less than or equal to 80% of delta A;
vi, when ω4＜(IStandard current for judging filth blockage/IInitial filth blockage standard current 0)≤ω5When the filter screen is in use, the filthy blockage area of the filter screen is delta A and is more than 80 percent;
the filter screen filth blockage area judgment result is sent to a mobile terminal or other display client terminals connected with the air conditioner, and a user can check the filter screen filth blockage area judgment result at any time. As an optional manner, the value ranges of the parameters mentioned in this embodiment are as follows: omega 1 is not less than omega 2 is not less than omega 3 is not less than omega 4 is not less than omega 5, wherein omega 1, omega 2, omega 3, omega 4, omega 5 belongs to [1, 1000 ].
In an optional embodiment of the present invention, after the filthy blockage area of the filter screen is calculated in the step S104, whether the filthy blockage area of the filter screen is larger than a preset area may be determined; if so, sending first prompt information for prompting a user to clean the filter screen; the first prompt message comprises at least one of displaying a filth blockage mark on a display screen of an indoor unit of the air conditioner, lighting a filth blockage prompt lamp, playing buzzer sound prompt, playing voice prompt and displaying the filth blockage mark on a remote controller.
For example, when the filth blockage area of the filter screen is judged to be more than 60 percent, namely (I)Standard current for judging filth blockage/IInitial filth blockage standard current 0)＞ω3And then, performing filth blockage reminding on the filter screen to remind a user to clean the filter screen, wherein the reminding mode comprises displaying a filth blockage mark on a display screen of the inner machine, lighting a filth blockage prompt lamp, performing buzzer sound reminding, performing voice reminding, displaying the filth blockage mark by a remote controller and the like.
Further, the optional embodiment of the present invention may further obtain the number of times of prompting the first prompt information, and determine whether the number of times of prompting the first prompt information is greater than a preset number of times; if yes, sending out second prompt information; the second prompt message comprises at least one of displaying a filth blockage mark on a display screen of the indoor unit, lighting a filth blockage prompt lamp and displaying the filth blockage mark by a remote controller.
For example, after n times of filth blockage judgment reminding (n is less than or equal to 10), if the user still does not clean the filter screen in time, only reminding (reminding lamp, characters and the like) of the filth blockage mark of the filter screen is performed when the air conditioner is started next time, and sound reminding (buzzer, voice) is not performed, so that the user is prevented from continuously disturbing activities such as rest and the like. The filter screen filth blockage judgment does not influence the normal operation of the air conditioner and the use of users.
Fig. 2 illustrates a method for detecting filth clogging of a filter screen of an air conditioner according to another alternative embodiment of the present invention, and as can be seen from fig. 2, the method may include:
step S201, recording historical operation data after the air conditioner is installed; the historical operation data comprises a first accumulated operation time and a starting operation time after each starting in a historical time period;
step S202, recording current operation data of the air conditioner as historical operation data after judging that no shutdown fault related to an inner fan motor occurs during each startup, the operation time of each startup is greater than the set operation time, and the first accumulated operation time is not less than the first preset time based on the historical operation data;
step S203, acquiring the accumulated running time of the air conditioner, and judging whether the accumulated running time is not less than a second preset time; if yes, executing step S204, otherwise, continuing to execute step S203;
step S204, recording the current operation data of the air conditioner as detection operation data;
step S205, calculating I based on historical operating data and detection operating dataStandard current for judging filth blockage；
Step S206, calculate IStandard current for judging filth blockageWith a predetermined value of IInitial filth blockage standard currentThe current ratio of (a);
step S207, estimating the filth blockage area of the filter screen according to the current ratio, and displaying the filth blockage area at the corresponding mobile end of the air conditioner;
and S208, when the filth blockage area is larger than 60%, performing filth blockage reminding on the filter screen.
According to the filter screen filth blockage detection method of the air conditioner, the standard fan loads in different filth blockage states are determined according to the actual operation working conditions, the influence of the parameters of the actual operation parameters of the air conditioner, such as an outer ring, an inner ring, humidity, inner tube temperature (air outlet temperature) and motor aging, on the indoor fan load is considered, the influence of the parameters on the indoor fan load is eliminated, and the filter screen filth blockage judgment accuracy is improved. In addition, the filth blockage area of the filter screen can be estimated, so that the accuracy of the filth blockage reminding of the filter screen is further improved.
Based on the same inventive concept, an embodiment of the present invention further provides an air conditioner, as shown in fig. 3, the air conditioner may include: an indoor unit 310 and a controller 320. A filter screen is arranged in the indoor unit 310; the controller 320 is configured to execute the filter screen filth blockage detection method of the air conditioner according to the above embodiment.
In addition to the above, the air conditioner may further include an outdoor unit, a cooling and heating system, and other related components, which are well known to those skilled in the art and will not be described herein.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.

Claims (9)

1. A filter screen filth blockage detection method of an air conditioner is characterized by comprising the following steps:
acquiring detection operation data of the air conditioner and historical operation data in a historical time period, wherein the detection operation data at least comprise a detection inner tube temperature, a detection indoor temperature and a detection outdoor temperature, and the historical operation data at least comprise a reference inner tube temperature, a reference indoor temperature and a reference outdoor temperature;
detecting the accumulated running time of the motor; acquiring detection operation data of the air conditioner, and calculating filth blockage judgment standard current of a fan of the air conditioner according to the historical operation data, the detection operation data and the accumulated operation time;
and estimating the filth blockage area of the filter screen of the air conditioner according to the calculated ratio of the filth blockage judgment standard current to the preset initial filth blockage standard current.
2. The method of claim 1, wherein the detection method further comprises:
recording the running time of the air conditioner at each starting time in a historical time period before acquiring reference running data of the air conditioner in the historical time period;
acquiring the accumulated running time of the air conditioner for judging whether the filter screen is dirty or not for the first time by the air conditioner based on the running time, and taking the accumulated running time as a first accumulated running time;
acquiring the running time of the air conditioner after each starting as the starting running time;
judging whether the first accumulated running time is greater than a first preset accumulated running time, judging whether the starting running time of the air conditioner after each starting is greater than a preset starting running time and/or judging whether a preset fault type does not occur in each starting of the air conditioner;
and if at least one judgment result is yes, executing the step of acquiring the reference operation data of the air conditioner.
3. The method of claim 1, wherein the detection method further comprises:
before the detection operation data of the air conditioner is obtained, obtaining the total accumulated operation time of the air conditioner as a second accumulated operation time;
judging whether the second accumulated operation time is greater than a second preset accumulated operation time or not;
and if so, executing the step of acquiring the detection operation data of the air conditioner.
4. The method of claim 1, wherein the historical operating data includes at least one of a reference inner fan draft, a reference indoor unit motor parameter, a reference outdoor humidity, a reference indoor humidity; the reference indoor unit motor parameter comprises at least one of reference current, reference voltage, reference motor temperature and reference duty ratio PWM;
the detection operation data comprises detection of an inner fan wind shield, detection of outdoor humidity, detection of indoor humidity and detection of indoor unit motor parameters; the detection of the parameters of the motor of the indoor unit comprises at least one of detection of current, detection of voltage, detection of motor temperature, detection of duty ratio PWM and detection of accumulated running time of the motor.
5. The method of claim 4, wherein modifying the sensed operational data based on the historical operational data to obtain a modified fan load parameter for the air conditioner comprises:
acquiring a filth blockage judgment standard current of the air conditioner based on the following formula;
Figure FDA0003511195670000021
wherein d (t)Detecting the accumulated running time of the motor)＝k1×tDetecting the accumulated running time of the motor 2+k2×tDetecting the accumulated running time of the motor+k3；
a. b, c, e, k1, k2, k3 are all constants.
6. The method of claim 4, wherein modifying the sensed operational data based on the historical operational data to obtain a modified fan load parameter for the air conditioner comprises:
acquiring a filth blockage judgment standard current of the air conditioner based on the following formula;
Ivisceral obstruction judgmentOff standard current＝ICurrent of fan+ΔIDirty blockage judgment standard correction current
Figure FDA0003511195670000022
Wherein, κ (t)Detecting the accumulated running time of the motor)＝μ×tDetecting the accumulated running time of the motor 2+ν×tDetecting the accumulated running time of the motor+π；
Alpha, beta and gamma are constants.
7. The method according to any one of claims 1 to 6, wherein after calculating a ratio of a corrected fan load parameter to a preset standard fan load parameter and estimating a dirty blocking area of a filter screen of the air conditioner according to the ratio, the method further comprises:
judging whether the filth blockage area of the filter screen is larger than a preset area or not;
if so, sending first prompt information for prompting a user to clean the filter screen;
the first prompt information comprises at least one of displaying a filth blockage mark on a display screen of the indoor unit of the air conditioner, lighting a filth blockage prompt lamp, playing buzzer sound prompt, playing voice prompt and displaying the filth blockage mark on a remote controller.
8. The method of claim 7, further comprising:
acquiring the prompting times of the first prompting information, and judging whether the prompting times of the first prompting information is greater than a preset time;
if yes, sending out second prompt information;
the second prompt information comprises at least one of displaying a filth blockage mark on a display screen of the indoor unit, lighting a filth blockage prompt lamp and displaying the filth blockage mark by a remote controller.
9. An air conditioner, comprising:
the indoor unit is internally provided with a filter screen;
a controller for performing the filter screen filth blockage detecting method of the air conditioner as set forth in any one of claims 1 to 8.
CN202011290190.7A 2020-11-17 2020-11-17 Filter screen filth blockage detection method of air conditioner and air conditioner Active CN112484235B (en)

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