CN114234364B - Dirty blocking judgment method and device for air conditioner filter screen and air conditioner - Google Patents

Dirty blocking judgment method and device for air conditioner filter screen and air conditioner Download PDF

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Publication number
CN114234364B
CN114234364B CN202111553823.3A CN202111553823A CN114234364B CN 114234364 B CN114234364 B CN 114234364B CN 202111553823 A CN202111553823 A CN 202111553823A CN 114234364 B CN114234364 B CN 114234364B
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frequency
temperature
preset
compressor
filter screen
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CN114234364A (en
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袁封明
周涯宸
王成
张新明
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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
    • 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
    • F24F11/62—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
    • 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
    • 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
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a method and a device for judging dirty blocking of an air conditioner filter screen and an air conditioner, and relates to the technical field of air conditioners, wherein the method for judging dirty blocking of the air conditioner filter screen comprises the following steps: when the accumulated running time of the indoor fan reaches the preset time, judging whether the air conditioner is in a heating mode or not, and judging that the cold air prevention mode is in a closing state; if so, acquiring indoor environment temperature, coil temperature and compressor operating frequency, and determining inner-tube inner-ring temperature difference and coil temperature rising rate based on the indoor environment temperature and the coil temperature; judging whether the filter screen is dirty or not based on the temperature difference of the inner ring of the inner pipe, the temperature rising rate of the coil pipe and the running frequency of the compressor. The invention comprehensively considers a plurality of operation indexes of the air conditioner so as to avoid misjudgment on the filth blockage of the filter screen as much as possible, and improves the accuracy of filth blockage judgment of the filter screen.

Description

Dirty blocking judgment method and device for air conditioner filter screen and air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to a method and a device for judging dirt blocking of an air conditioner filter screen and an air conditioner.
Background
The filter screen that sets up on the air conditioner internal unit takes place dirty stifled condition easily, can lead to the amount of wind to reduce when dirty stifled takes place for filter screen, and exhaust temperature and high off-high under the heating mode can lead to the compressor coil overheated if be in dirty stifled state for a long time, influences the heating effect. In the current filter screen dirty blocking judging mode, after the accumulated running time of the fan reaches a certain time, the filter screen is considered to be dirty blocking to remind a user of cleaning. However, when the accumulated running time of the fan reaches a certain time, the filter screen may not be blocked, so that the filter screen blocking judgment accuracy is low, and erroneous judgment is easy to generate.
Disclosure of Invention
In order to solve the problems, the invention provides a method and a device for judging the filth blockage of an air conditioner filter screen, and an air conditioner, which can prevent misjudgment on the filth blockage of the filter screen and improve the accuracy of filth blockage judgment of the filter screen.
According to an embodiment of the present invention, on the one hand, there is provided a method for judging filth blockage of an air conditioner filter screen, including: when the accumulated running time of the indoor fan reaches the preset time, judging whether the air conditioner is in a heating mode or not, and judging that the cold air prevention mode is in a closing state; if so, acquiring indoor environment temperature, coil temperature and compressor operating frequency, and determining inner tube inner ring temperature difference and coil heating rate based on the indoor environment temperature and the coil temperature; judging whether the filter screen is blocked or not based on the temperature difference of the inner ring of the inner pipe, the temperature rising rate of the coil pipe and the running frequency of the compressor.
By adopting the technical scheme, the temperature difference of the inner ring of the inner pipe and the temperature rising rate of the coil are detected and calculated, whether the filter screen is dirty and blocked is judged according to the temperature difference of the inner ring of the inner pipe, the temperature rising rate of the coil and the frequency of the compressor, multiple operation indexes of the air conditioner are comprehensively considered, the misjudgment of the dirty and blocked of the filter screen can be avoided, and the accuracy of the dirty and blocked judgment of the filter screen is improved.
Preferably, the step of judging whether the filter screen is dirty and blocked based on the inner ring temperature difference of the inner pipe, the coil heating rate and the compressor running frequency comprises the following steps: obtaining a maximum value of the coil temperature within a first preset time period when the compressor is started, and obtaining a target coil temperature; and determining that the filter screen is blocked when the inner ring temperature difference of the inner pipe is larger than a preset difference value, the target coil temperature is larger than or equal to a preset limit value, the coil heating rate is larger than a preset rate and the operating frequency of the compressor is larger than a preset frequency.
Through adopting above-mentioned technical scheme, it is faster at current coil pipe temperature rise, and compressor running frequency is great, confirms that the filter screen takes place dirty stifled, has promoted the dirty accuracy of judging of stifled of filter screen, avoids influencing the normal operating of air conditioner, has promoted user experience.
Preferably, the step of determining the inner tube inner ring temperature difference and the coil temperature rise rate based on the indoor environment temperature and the coil temperature includes: acquiring indoor environment temperature and coil temperature when a compressor is started for a first preset time period, and calculating a difference value between the coil temperature and the indoor environment temperature to obtain an inner-tube inner-ring temperature difference; acquiring the initial coil temperature when the compressor is started and the maximum coil temperature within a second preset time period when the compressor is started; acquiring acquisition time corresponding to the maximum coil temperature, and determining the coil temperature rising rate based on the initial coil temperature, the maximum coil temperature and the acquisition time.
By adopting the technical scheme, the temperature difference of the inner ring of the inner pipe and the temperature rising rate of the temperature of the coil to the maximum coil temperature are calculated, so that the rising speed of the coil temperature can be accurately obtained, and a reliable judgment basis is provided for judging the filth blockage of the filter screen.
Preferably, the first preset time period is determined based on the current indoor environment temperature: if the current indoor environment temperature is greater than or equal to a preset temperature, the first preset duration takes a value of X; if the current indoor environment temperature is smaller than the preset temperature, the first preset duration takes a value of Y; wherein Y > X.
By adopting the technical scheme, when the current indoor environment temperature is higher, the judging time length is set to be shorter, when the current indoor environment temperature is lower, the judging time length is set to be longer, the phenomenon that the coil temperature does not reach a stable state, which results in inaccurate temperature difference of the inner ring of the inner pipe obtained through calculation, the accuracy of determining the temperature difference of the inner ring of the inner pipe is improved, and an accurate judging basis is provided for judging filth blockage of a filter screen.
Preferably, when the frequency-limited highest frequency of the air conditioner is greater than or equal to a preset frequency threshold, the preset frequency is a first frequency; the frequency limiting highest frequency is the maximum value of frequency limiting frequencies corresponding to the air conditioner at each outdoor environment temperature; when the frequency-limited highest frequency is smaller than the preset frequency threshold, the preset frequency is a second frequency; wherein the second frequency is less than the first frequency.
By adopting the technical scheme, the frequency judgment threshold is correspondingly set according to the frequency limiting highest frequency of the compressor, when the frequency limiting highest frequency of the compressor is higher, the preset frequency is set to be a larger value, and when the frequency limiting highest frequency of the compressor is lower, the preset frequency is set to be a smaller value, so that the filter screen filth blockage judgment caused by different frequency limiting frequencies of the air conditioner is avoided, and the accuracy and rationality of the filter screen filth blockage judgment are improved.
Preferably, the method for judging dirt blocking of the air conditioner filter screen further comprises the following steps: when the filter screen is dirty and blocked, acquiring the current outdoor environment temperature and the frequency limiting frequency corresponding to the outdoor environment temperature; acquiring the current operating frequency of a compressor, setting the frequency-increasing rate of the compressor to be a first rate when the current operating frequency is smaller than or equal to a preset target frequency, and enabling the operating frequency of the compressor to be always smaller than the preset target frequency; wherein the preset target frequency is related to the frequency limiting frequency, and the preset target frequency is smaller than the frequency limiting frequency; and when the current running frequency is greater than the preset target frequency, controlling the compressor to perform frequency reduction at a second rate until the current running frequency is reduced to the preset target frequency.
Through adopting above-mentioned technical scheme, after the filter screen takes place dirty stifled, restriction compressor's frequency of raising and the highest running frequency to control compressor frequency-lowering operation when the current running frequency of compressor is great, can prevent that compressor running frequency from being too high, avoid the frequent overload protection of compressor, avoid the compressor coil to run under high temperature exhaust for a long time, prolonged the life of compressor, promoted the reliability and the stability of compressor operation.
Preferably, the method for judging dirt blocking of the air conditioner filter screen further comprises the following steps: when the filter screen is dirty and blocked, a filter screen dirty and blocked prompt is sent out to prompt a user to clean the filter screen; when the filter screen is detected to be detached and reinstalled, the accumulated running duration of the indoor fan is controlled to be cleared.
Through adopting above-mentioned technical scheme, when accurately judging to obtain that the filter screen takes place dirty stifled, send the dirty stifled warning of filter screen, avoid the filter screen actually not taking place dirty stifled when sending the warning, promoted user experience.
According to an embodiment of the present invention, on the other hand, there is provided an air conditioner filter screen filth blockage judging device, including: the first judging module is used for judging whether the air conditioner is in a heating mode or not and the cold air prevention mode is in a closed state when the accumulated running time of the indoor fan reaches a preset time; the determining module is used for acquiring indoor environment temperature, coil temperature and compressor operating frequency when the air conditioner is in a heating mode and the cold air prevention mode is in a closed state, and determining inner pipe inner ring temperature difference and coil heating rate based on the indoor environment temperature and the coil temperature; and the second judging module is used for judging whether the filter screen is blocked or not based on the inner ring temperature difference of the inner pipe, the coil heating rate and the compressor running frequency.
According to an embodiment of the present invention, there is provided an air conditioner including a computer readable storage medium storing a computer program and a processor, the computer program implementing the method according to any one of the first aspects when read and executed by the processor.
According to an embodiment of the present invention, there is provided in a further aspect a computer readable storage medium storing a computer program which, when read and executed by a processor, implements a method according to any one of the first aspects.
The invention has the following beneficial effects: through when the air conditioner is in the heating mode and the fan normally operates, the inner-tube inner-ring temperature difference and the coil heating rate are detected and calculated, whether the filter screen is dirty and blocked is judged according to the inner-tube inner-ring temperature difference, the coil heating rate and the compressor frequency, multiple operation indexes of the air conditioner are comprehensively considered, misjudgment on the dirty and blocked of the filter screen can be avoided, and the accuracy of the dirty and blocked judgment of the filter screen is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
FIG. 1 is a flow chart of a method for judging dirt blocking of an air conditioner filter screen;
fig. 2 is a schematic structural diagram of a dirt blocking judging device for an air conditioner filter screen.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
At present, the conventional air conditioner filter screen filth blockage treatment technology has the following defects: on the one hand, after the accumulated running time of the fan reaches a certain time, if the filter screen is not blocked, a user is reminded of cleaning, the use experience of the user is affected, and the filter screen blocking judgment accuracy is low; on the other hand, if the filter screen is indeed blocked after the accumulated running time of the fan reaches a certain time, but the filter screen is not cleaned by a user after the blocking reminding is sent, frequent overload protection of the compressor is easily caused, user experience is reduced, and the compressor coil runs under high-temperature exhaust for a long time, so that the service life is shortened. In order to solve the problem, the method and the device for judging the filth blockage of the air conditioner filter screen and the air conditioner provided by the embodiment of the invention can be applied to improving the accuracy of judging the filth blockage of the filter screen, thereby improving the user experience. Embodiments of the present invention are described in detail below.
The embodiment provides a method for judging the filth blockage of an air conditioner filter screen, which can be applied to a controller of an air conditioner, and is shown in a flow chart of the method for judging the filth blockage of the air conditioner filter screen in fig. 1, and mainly comprises the following steps of S102 to S106:
Step S102: when the accumulated running time of the indoor fan reaches the preset time, judging whether the air conditioner is in a heating mode or not, and judging that the cold air prevention mode is in a closing state.
The accumulated running time of the indoor fan can be running time which is easy to cause dirt blocking of the filter screen, the value range of the accumulated running time can be 400-600 h, and the optimal value is 500h.
When the indoor fan is in accumulated running for a certain period of time, the filter screen is easy to generate dirty blockage, and the normal running of the air conditioner is affected.
Step S104: if so, acquiring the indoor environment temperature, the coil temperature and the operating frequency of the compressor, and determining the inner ring temperature difference of the inner tube and the temperature rising rate of the coil based on the indoor environment temperature and the coil temperature.
Based on the temperature sensor, the indoor environment temperature and the coil temperature are respectively monitored, when the accumulated operation duration of the indoor fan reaches the preset duration, the air conditioner is in a heating mode operation and a cold air prevention mode is closed, the indoor environment temperature and the coil temperature which are periodically collected after the compressor is started to operate are obtained, and the current compressor operation frequency is obtained.
The temperature difference of the inner ring of the inner pipe is the difference between the temperature of the coil pipe and the indoor environment temperature, and the temperature rising rate of the coil pipe is the rising rate of the temperature of the coil pipe within a certain period of time after the compressor starts to operate.
Step S106: judging whether the filter screen is dirty or not based on the temperature difference of the inner ring of the inner pipe, the temperature rising rate of the coil pipe and the running frequency of the compressor.
Considering that the filter screen is blocked, the temperature of the coil pipe can rise faster, the frequent protection of the compressor is easy to stop, the heating effect is affected, and whether the filter screen is blocked or not can be accurately judged by judging the temperature difference of the inner ring of the inner pipe, the temperature rising rate of the coil pipe and the running frequency of the compressor.
According to the method for judging the filth blockage of the air conditioner filter screen, when the air conditioner is in the heating mode and the fan is in normal operation, the inner pipe inner ring temperature difference and the coil heating rate are detected and calculated, whether the filter screen is filth blockage is judged according to the inner pipe inner ring temperature difference, the coil heating rate and the compressor frequency, multiple operation indexes of the air conditioner are comprehensively considered, misjudgment on filth blockage of the filter screen can be avoided, and accuracy of filth blockage judgment of the filter screen is improved.
In a possible implementation manner, the embodiment provides an implementation manner of determining the inner ring temperature difference of the inner pipe and the temperature rising rate of the coil based on the indoor environment temperature and the coil temperature, and the implementation manner can be specifically implemented with reference to the following steps (1) to (3):
Step (1): and acquiring the indoor environment temperature and the coil temperature when the compressor is started for a first preset time period, and calculating the difference value between the coil temperature and the indoor environment temperature to obtain the inner pipe inner ring temperature difference.
Obtaining indoor environment temperature T when a compressor is started for a first preset time period T Inner ring t And coil temperature T Inner tube t Inner tube inner ring temperature difference = coil temperature T Inner tube t -T Inner ring t 。
In a possible embodiment, the first preset duration is determined based on a current indoor environment temperature: if the current indoor environment temperature is greater than or equal to the preset temperature, the first preset duration takes the value X; if the current indoor environment temperature is smaller than the preset temperature, the value of the first preset duration is Y; wherein, Y is more than X, and the value range of Y-X can be 40-50 s.
The value range of the preset temperature TA can be 20-24 ℃. Detecting the current indoor environment temperature, determining the first preset duration based on the current indoor environment temperature, and if the current indoor environment temperature T is Inner ring The temperature is not less than TA ℃, the indoor environment temperature is higher, the temperature of the coil pipe can be raised higher, the first preset duration is set to be shorter duration Xs, namely, the inner ring temperature difference of the inner pipe is calculated when the compressor is started to operate for shorter duration; if the current indoor environment temperature T Inner ring The temperature of the indoor environment is lower below TA ℃, the rising speed of the temperature of the coil is lower, and the first preset time length is set to be longer time length Ys, namely the temperature difference of the inner ring of the inner tube is calculated after the compressor is started to operate for a longer time.
The method has the advantages that when the current indoor environment temperature is higher, the judging time length is set to be shorter, when the current indoor environment temperature is lower, the judging time length is set to be longer, the phenomenon that the coil temperature does not reach a stable state, the calculated inner tube inner ring temperature difference is inaccurate is avoided, the accuracy of inner tube inner ring temperature difference determination is improved, and an accurate judging basis is provided for filter screen filth blockage judgment.
Step (2): and acquiring the initial coil temperature when the compressor is started and the maximum coil temperature within a second preset time period when the compressor is started.
The coil temperature detected when the compressor is turned on is obtained, and the coil temperature when the compressor is turned on is recorded as an initial coil temperature. And obtaining the temperature of each coil detected in the second preset time period when the compressor is started, obtaining the coil temperature with the maximum temperature value from the temperature detected in the second preset time period, and recording the temperature as the maximum coil temperature.
The value range of the second preset time period can be 120 s-130 s, namely the temperature rising rate of the temperature of the detection coil pipe to the highest value when the compressor is started and operated for 120 s-130 s.
Step (3): acquiring acquisition time corresponding to the maximum coil temperature, and determining the coil temperature rising rate based on the initial coil temperature, the maximum coil temperature and the acquisition time.
Recording the acquisition time t corresponding to the maximum coil temperature zd The acquisition time is counted by taking the starting point of the compressor when the compressor is started, namely, the time when the compressor is started is 0, the coil heating rate Tv= (T) max inner tube 0-t3s -T Inner tube 0s )/t zd Wherein T is Inner tube 0s T is the initial coil temperature at compressor start-up max inner tube 0-t3s And starting the compressor for a second preset time period to obtain the maximum coil temperature.
When the filter screen is in dirty blockage, the temperature of the coil pipe can rise faster, and the rising speed of the temperature of the coil pipe can be accurately obtained by calculating the temperature difference of the inner ring of the inner pipe and the rising speed of the temperature of the coil pipe to the maximum temperature of the coil pipe, so that a reliable judgment basis is provided for judging the dirty blockage of the filter screen.
In a possible implementation manner, the embodiment provides an implementation manner of judging whether the filter screen is blocked or not based on the inner pipe inner ring temperature difference, the coil heating rate and the compressor operating frequency, and the implementation manner can be specifically implemented with reference to the following steps 1) to 2):
step 1): and obtaining the maximum value of the coil temperature in the first preset time period when the compressor is started, and obtaining the target coil temperature.
If the current indoor environment temperature T Inner ring The temperature is not less than TA ℃, and the maximum value T of the coil temperature in the time interval of 0s-Xs after the compressor is started is obtained max inner tube 0-Xs The target coil temperature is noted.
If the current indoor environment temperature T Inner ring Obtaining the maximum value T of the coil temperature in the time interval of 0s-Ys after the compressor is started and below TA DEG C max inner tube 0-Ys The target coil temperature is noted.
Step 2): when the temperature difference of the inner ring of the inner pipe is larger than a preset difference value, the temperature of the target coil is larger than or equal to a preset limit value, the temperature rising rate of the coil is larger than a preset rate, and the running frequency of the compressor is larger than a preset frequency, the filter screen is determined to be blocked.
When the air conditioner simultaneously meets the conditions that the inner ring temperature difference of the inner pipe is larger than a preset difference value, the temperature of the target coil is larger than or equal to a preset limit value, the temperature rising rate of the coil is larger than a preset rate and the operating frequency of the compressor is larger than a preset frequency, the current coil temperature rises faster, the operating frequency of the compressor is larger, the current coil temperature is possibly caused by filth blockage of the filter screen, the filth blockage of the filter screen is determined, so that a user is reminded of timely cleaning the filter screen, and the influence on the normal operation of the air conditioner is avoided.
The operating frequency of the compressor is acquired after the compressor stably operates, if the operating frequency of the compressor is too low, the change of the pipe temperature value is small, and the dirty blockage judgment is interfered, so that the dirty blockage judgment is more reasonable when the compressor stably operates to a certain frequency or above.
Wherein the value range of the preset difference value can be [10 ℃,25℃ ]]The preferred value is 15 ℃. The preset limit value is T Temperature frequency limiting value of inner coil pipe -3，T Temperature frequency limiting value of inner coil pipe The compressor frequency limit value corresponding to the temperature of the inner coil pipe in the air conditioner heating mode is set, if the temperature of the inner coil pipe reaches the value, the frequency of the press machine cannot be continuously increased, and each air conditioner is provided with a unique preset limit value T Temperature frequency limiting value of inner coil pipe . The preset rate may be in the range of 0.2 to 0.3 ℃/HZ, preferably 0.25 ℃/HZ. The preset frequency can be 35-45 HZ.
In a possible implementation manner, the present embodiment provides an implementation manner of determining the above-mentioned preset frequency, and may be specifically performed with reference to the following (1) to (2):
(1) When the frequency limiting highest frequency of the air conditioner is larger than or equal to a preset frequency threshold value, the preset frequency is the first frequency.
The frequency limiting highest frequency is the maximum value of the corresponding frequency limiting frequencies of the air conditioner at each outdoor environment temperature. The frequency limiting frequency corresponding to each outdoor environment temperature of the air conditioner model is obtained, and the maximum value is obtained from the plurality of frequency limiting frequencies and is recorded as the frequency limiting highest frequency Fmax. The preset frequency threshold value may be in the range of 90-110 HZ, and preferably 100HZ.
If Fmax is more than or equal to 100HZ, the value range of the preset frequency can be set to 40-45 HZ.
(2) When the highest frequency of the frequency limiting is smaller than a preset frequency threshold, the preset frequency is the second frequency; wherein the second frequency is less than the first frequency.
If Fmax is less than 100HZ, the value range of the preset frequency can be set to 35-40 HZ. By setting the frequency judgment threshold according to the frequency limitation highest frequency correspondence of the compressor, when the maximum frequency limitation frequency of the compressor is higher, the preset frequency is set to be a larger value, and when the maximum frequency limitation frequency of the compressor is lower, the preset frequency is set to be a smaller value, so that the filter screen filth blockage judgment is prevented from being interfered due to different frequency limitation frequencies of the air conditioner, and the accuracy and rationality of the filter screen filth blockage judgment are improved.
In a possible implementation manner, the method for judging the filth blockage of the air conditioner filter screen provided in this embodiment further includes the following steps a to c:
and a, when the filter screen is dirty and blocked, acquiring the current outdoor environment temperature and the frequency limiting frequency corresponding to the outdoor environment temperature.
When determining that the filter screen is dirty and blocked, detecting the current outdoor environment temperature, and acquiring the corresponding frequency limiting frequency F of the air conditioner in the current outdoor environment N 。
And b, acquiring the current operating frequency of the compressor, setting the frequency-increasing rate of the compressor to be a first rate when the current operating frequency is smaller than or equal to a preset target frequency, and enabling the operating frequency of the compressor to be always smaller than the preset target frequency.
The preset target frequency is related to the frequency limit frequency, and is smaller than the frequency limit frequency, and the value range of the preset target frequency can be F N ×55％～F N X65%, preferably F N ×60％。
If the current operating frequency is less than or equal to the preset target frequency, the frequency raising rate of the compressor is set to be as low as possible, for example, 1-2 HZ/60s, preferably 1HZ/60s, when the compressor needs to raise the frequency, the compressor is controlled to raise the frequency at the first rate, and the maximum value of the operating frequency of the compressor is less than the preset target frequency.
And c, when the current running frequency is greater than the preset target frequency, controlling the compressor to perform frequency reduction at a second rate until the current running frequency is reduced to the preset target frequency.
If the current operating frequency is greater than the preset target frequency, controlling the compressor to start the frequency-reducing mode operation, wherein the frequency-reducing rate is the second rate until the operating frequency of the compressor is reduced to the preset target frequency F N The second rate may have a value in the range of 1 to 3HZ/3s, preferably 1HZ/3s, by 60%.
Through after the filter screen takes place dirty stifled, restriction compressor's frequency of raising and the highest running frequency to control compressor frequency-reducing operation when the current running frequency of compressor is great, can prevent that compressor running frequency from being too high, avoid the frequent overload protection of compressor, avoid the compressor coil to run under high temperature exhaust for a long time, prolonged the life of compressor, promoted the reliability and the stability of compressor operation.
In a possible implementation manner, the method for judging the filth blockage of the air conditioner filter screen provided in this embodiment further includes the following implementation manners:
when the filter screen is dirty and blocked, a filter screen dirty and blocked prompt is sent out to prompt a user to clean the filter screen; when the filter screen is detected to be detached and reinstalled, the accumulated running time of the indoor fan is controlled to be cleared.
The filter screen dirt blocking reminding can comprise a reminding mode of displaying a cleaning code prompt, a voice prompt or a light prompt through a display so as to remind a user of cleaning the filter screen. When the user removes the filter screen and installs the filter screen again, the accumulated running time of the indoor fan is cleared, the accumulated running time of the indoor fan is counted again, and when the accumulated running time of the indoor fan reaches the preset time, the air conditioner filter screen dirty blockage judging method is entered again to carry out dirty blockage judgment. Through sending the dirty blocking reminding of the filter screen when the filter screen is accurately judged to be dirty blocked, the filter screen is prevented from being dirty blocked actually when the reminding is sent, and the user experience is improved.
According to the method for judging the filth blockage of the air conditioner filter screen, provided by the embodiment, after the accumulated running time of the indoor fan reaches a certain time, whether the filter screen is filth-blocked or not is accurately judged according to the change speed of the temperature of the coil pipe and the running frequency of the compressor, a user is reminded to clean the filter screen when the filter screen is filth-blocked, meanwhile, the running frequency of the compressor is controlled, the compressor coil is prevented from being overheated due to high frequency, and the compressor is protected.
Corresponding to the method for judging the filth blockage of the air conditioner filter screen provided by the embodiment of the invention, the embodiment of the invention provides an example of carrying out filth blockage reminding and operation protection on the air conditioner by applying the method for judging the filth blockage of the air conditioner filter screen, and the method can be specifically executed by referring to the following steps 1 to 4:
and step 1, judging whether a preset dirty blockage generating condition is met or not when the accumulated running time of the indoor fan is more than or equal to 500 hours and the cold air prevention mode is closed in a heating mode.
After 500h, a filter screen can accumulate certain dust to influence the operation of an air conditioner, firstly, whether the fan meets the condition that the accumulated operation time is more than or equal to 500h or not, the fan is not opened in a cold air prevention mode, whether the filter screen is dirty or not can not be judged, and whether the filter screen is dirty or not is judged by a tube temperature change value after the fan is opened is needed, so that the cold air prevention mode is needed to be closed.
The preset dirty blockage generating conditions comprise a first condition to a third condition, and when the first condition to the third condition are met at the same time, the air conditioner is determined to meet the preset dirty blockage generating conditions.
Condition one: if the indoor environment temperature T Inner ring If the temperature is more than or equal to TA ℃, the temperature of the coil pipe reaches a higher value quickly, the judging time is T1s, and whether the moment of starting the compressor for T1s meets T is judged firstly Inner tube t1S -T Inner ring t1S ＞T Preset difference value If so, judging the temperature T of the coil in the time interval of 0-T1s after the compressor is started Inner pipe If the temperature of the coil pipe exceeds a certain limit value, the coil pipe temperature rises faster and possibly is caused by dirty blockage, and the judgment conditions are as follows: t (T) max inner tube 0-t1s ≥T Temperature frequency limiting value of inner coil pipe -3. I.e. T Inner tube t1S -T Inner ring t1S ＞T Preset difference value And T max inner tube 0-t1s ≥T Temperature frequency limiting value of inner coil pipe -3 in case both conditions are fulfilled, determining that condition one is fulfilled.
If indoor ringAmbient temperature T Inner ring If the temperature of the coil is lower than TA ℃, the temperature of the coil reaches a higher value, the judgment time is t2s, and t2s is more than t1s. Firstly, judging whether the moment T2s when the compressor is started meets T Inner tube t2S -T Inner ring t2S ＞T Preset difference value If so, then judging the temperature T of the inner coil in the time interval of 0-T2s after the compressor is started Inner pipe If the temperature of the coil pipe exceeds a certain limit value, if the temperature exceeds the limit value, the temperature of the coil pipe rises faster and possibly is caused by dirty blockage, and the judgment conditions are as follows: t (T) max inner tube 0-t2s ≥T Temperature frequency limiting value of inner coil pipe -3. I.e. T Inner tube t2S -T Inner ring t2S ＞T Preset difference value And T max inner tube 0-t2s ≥T Temperature frequency limiting value of inner coil pipe -3 in case both conditions are fulfilled, determining that condition one is fulfilled.
Wherein the TA value is 20-24 ℃, the difference range between t2 and t1 is 40-50, and t2 is more than t1.T (T) Inner tube t1S 、T Inner tube t2S Instantaneous temperature values representing coil temperatures at times t1s, t2 s. T (T) Inner ring t1S 、T Inner ring t2S The instantaneous temperature values of the indoor environment temperature at times t1s and t2s are shown. T (T) max inner tube 0-t1s 、T max inner tube 0-t2s Respectively represent the maximum temperature value, T, of the inner coil temperature within the time of 0-T1s and 0-T2s Temperature frequency limiting value of inner coil pipe The compressor frequency limit value corresponding to the temperature of the inner coil is indicated in an air conditioner heating mode, the air conditioner generally has a unique value, and if the temperature of the inner coil reaches the value, the frequency of the compressor cannot be continuously increased. T (T) Preset difference value T represents the temperature difference judgment value of the inner disc and the inner ring of the filth blockage of the filter screen Preset difference value The value range of (C) is 10 ℃ to less than or equal to T Preset difference value The temperature is less than or equal to 25 ℃, and the default value is 15 ℃.
Under heating mode, T Inner ring The temperature of the inner tube reaches a higher value more quickly at the temperature of not less than TA ℃, so that the judging time is set to be shorter than T1s, T Inner ring The inner tube temperature is lower to a higher value below TA ℃, so the judging time should be set to be longer t2S.
Condition II: : detecting the maximum value T of the coil temperature within 0-T3s max inner tube 0-t3s Calculating the maximum T of the coil temperature max inner tube 0-t3s With initial temperature T of coil Inner tube 0s RecordingMaximum value T of recording tube temperature max inner tube 0-t3s Time t corresponding to time zd . the value of t3s is 120s-130s, namely the temperature rising rate of the detecting tube in the starting of the compressor is 120s-130s to the highest value.
Calculating the temperature rise rate Tv, tv= (Tmax of the inner disc Inner tube 0-t3s -T Inner tube 0s )/t zd If Tv is more than or equal to 0.25 ℃/HZ, the temperature of the coil pipe rises too fast, which is caused by filth blockage of the filter screen, and the second condition is met.
And (3) a third condition: after the compressor stably operates, the external ring temperature T of the air conditioner model is taken O (namely, the outdoor environment temperature is usually 15-60 ℃) and the frequency limiting frequency F O See the outer ring temperature and frequency limit value table shown in the following table:
table an outer ring temperature and frequency limiting value table
Figure BDA0003417916760000121
Figure BDA0003417916760000131
As shown in the above table one, when the outdoor environment temperature takes different values, the corresponding compressor frequency limiting frequencies are different, the maximum value is obtained from the frequency limiting frequencies corresponding to the outdoor environment temperatures of the air conditioner, and is recorded as the frequency limiting highest frequency Fmax, and then the current compressor operation frequency F is detected.
If Fmax is more than or equal to 100HZ and F is more than or equal to 40-45HZ, determining that the condition III is met;
if Fmax is less than 100HZ and F is more than or equal to 35-40HZ, determining that the condition III is satisfied.
If the running frequency of the compressor is too low, the temperature change of the coil is small, and the judgment is interfered, so that the judgment is needed to be carried out when the compressor runs to a certain frequency or above, and the judgment is more reasonable; if the highest frequency of the outer ring temperature is higher, the f value (i.e. the preset frequency) is too low, and the tube temperature may be slightly changed due to the low frequency, which may cause interference to the judgment, so that when the highest frequency of the outer ring temperature of the unit is higher, the f value should be synchronously raised.
Step 2, detecting the frequency limiting frequency F corresponding to the current outer ring temperature N If the current operating frequency F is less than or equal to F N X 60%, and if the compressor needs to raise its frequency, the raising frequency rate is controlled to be 1HZ/60s, and its highest frequency is less than F N X 60%; if F > F N The frequency of the compressor is reduced to F=F after the frequency is reduced by 60%, and the frequency reducing mode is started until the frequency of the compressor is reduced to 1HZ/3s N X 60%.
And step 3, the display reports a cleaning code or prompts a user to clean the filter screen through voice prompt.
And 4, removing the filter screen by a user, and resetting the accumulated running time of the indoor fan without reaching the dirty blockage judging entering condition of the filter screen after reinstallation.
Corresponding to the method for judging the filth blockage of the air conditioner filter screen provided by the embodiment, the embodiment of the invention provides a device for judging the filth blockage of the air conditioner filter screen, which can be applied to an air conditioner, and is shown in a schematic structural diagram of the device for judging the filth blockage of the air conditioner filter screen in fig. 2, and the device comprises the following modules:
the first judging module 21 is configured to judge whether the air conditioner is in the heating mode and the cold air preventing mode is in the off state when the accumulated running time of the indoor fan reaches a preset time.
The determining module 22 is configured to obtain an indoor environment temperature, a coil temperature, and a compressor operating frequency when the air conditioner is in the heating mode and the cold air preventing mode is in the off state, and determine an inner tube inner ring temperature difference and a coil heating rate based on the indoor environment temperature and the coil temperature.
The second judging module 23 is configured to judge whether the filter screen is dirty and blocked based on the inner ring temperature difference of the inner pipe, the temperature rising rate of the coil, and the operating frequency of the compressor.
According to the dirty blockage judging device for the air conditioner filter screen, provided by the embodiment, the dirty blockage judging device for the air conditioner filter screen judges whether the filter screen is dirty or not according to the inner pipe inner ring temperature difference, the coil heating rate and the compressor frequency by detecting and calculating the inner pipe inner ring temperature difference and the coil heating rate when the air conditioner is in a heating mode and the fan normally operates, multiple operation indexes of the air conditioner are comprehensively considered, misjudgment on the dirty blockage of the filter screen can be avoided, and the dirty blockage judging accuracy of the filter screen is improved.
In one embodiment, the second determining module 23 is further configured to obtain a maximum value of the coil temperature within a first preset duration of the compressor being turned on, so as to obtain a target coil temperature; when the temperature difference of the inner ring of the inner pipe is larger than a preset difference value, the temperature of the target coil is larger than or equal to a preset limit value, the temperature rising rate of the coil is larger than a preset rate, and the running frequency of the compressor is larger than a preset frequency, the filter screen is determined to be blocked.
In one embodiment, the determining module 22 is further configured to obtain an indoor environment temperature and a coil temperature when the compressor is turned on for a first preset period of time, calculate a difference between the coil temperature and the indoor environment temperature, and obtain an inner tube inner ring temperature difference; acquiring the initial coil temperature when the compressor is started and the maximum coil temperature within a second preset time period when the compressor is started; acquiring acquisition time corresponding to the maximum coil temperature, and determining the coil temperature rising rate based on the initial coil temperature, the maximum coil temperature and the acquisition time.
In one embodiment, the first preset time period is determined based on a current indoor environment temperature: if the current indoor environment temperature is greater than or equal to the preset temperature, the first preset duration takes the value X; if the current indoor environment temperature is smaller than the preset temperature, the value of the first preset duration is Y; wherein Y > X.
In one embodiment, when the frequency-limited highest frequency of the air conditioner is greater than or equal to a preset frequency threshold, the preset frequency is the first frequency; the maximum frequency limiting frequency is the maximum value of the corresponding frequency limiting frequencies of the air conditioner at each outdoor environment temperature; when the highest frequency of the frequency limiting is smaller than a preset frequency threshold, the preset frequency is the second frequency; wherein the second frequency is less than the first frequency.
In one embodiment, the apparatus further comprises:
the second control module is used for acquiring the current outdoor environment temperature and the frequency limiting frequency corresponding to the outdoor environment temperature when the filter screen is dirty and blocked; acquiring the current operating frequency of the compressor, setting the frequency-increasing rate of the compressor to be a first rate when the current operating frequency is smaller than or equal to a preset target frequency, and enabling the operating frequency of the compressor to be always smaller than the preset target frequency; wherein the preset target frequency is related to the frequency limiting frequency, and is smaller than the frequency limiting frequency; and when the current running frequency is greater than the preset target frequency, controlling the compressor to perform frequency reduction at a second rate until the current running frequency is reduced to the preset target frequency.
The dirty blocking reminding module is used for sending out dirty blocking reminding of the filter screen when the filter screen is dirty blocked so as to remind a user to clean the filter screen; when the filter screen is detected to be detached and reinstalled, the accumulated running time of the indoor fan is controlled to be cleared.
According to the filter screen filth blockage judging device for the air conditioner, provided by the embodiment, after the accumulated running time of the indoor fan reaches a certain time, whether the filter screen is filth blockage is accurately judged according to the change speed of the temperature of the coil pipe and the running frequency of the compressor, a user is reminded of cleaning the filter screen when the filter screen is filth blockage, meanwhile, the running frequency of the compressor is controlled, the compressor coil is prevented from being overheated due to high frequency, and the compressor is protected.
Corresponding to the method for judging the filth blockage of the air conditioner filter screen provided by the embodiment, the embodiment provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium stores a computer program, and the method for judging the filth blockage of the air conditioner filter screen provided by the embodiment is realized when the computer program is read and run by the processor.
The embodiment also provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor, implements each process of the above embodiment of the method for determining filth blockage of an air conditioner filter screen, and can achieve the same technical effects, so that repetition is avoided, and no further description is given here. Wherein the computer readable storage medium is selected from Read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk.
Of course, it will be appreciated by those skilled in the art that implementing all or part of the above-described methods in the embodiments may be implemented by a computer level to instruct a control device, where the program may be stored in a computer readable storage medium, and the program may include the above-described methods in the embodiments when executed, where the storage medium may be a memory, a magnetic disk, an optical disk, or the like.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.
Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the air conditioner filter screen filth blockage judging device and the air conditioner disclosed by the embodiment, the method corresponds to the air conditioner filter screen filth blockage judging method disclosed by the embodiment, so that the description is simpler, and relevant parts only need to be described by referring to the method part.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention, and the scope of the invention should be assessed accordingly to that of the appended claims.

Claims (6)

1. The method for judging the dirt blocking of the air conditioner filter screen is characterized by comprising the following steps of:
when the accumulated running time of the indoor fan reaches the preset time, judging whether the air conditioner is in a heating mode or not, and judging that the cold air prevention mode is in a closing state;
if so, acquiring indoor environment temperature, coil temperature and compressor operating frequency, and determining inner tube inner ring temperature difference and coil heating rate based on the indoor environment temperature and the coil temperature;
judging whether the filter screen is blocked or not based on the temperature difference of the inner ring of the inner pipe, the temperature rising rate of the coil pipe and the running frequency of the compressor;
the step of judging whether the filter screen is dirty and blocked or not based on the inner ring temperature difference of the inner pipe, the coil heating rate and the compressor running frequency comprises the following steps: obtaining a maximum value of the coil temperature within a first preset time period when the compressor is started, and obtaining a target coil temperature; when the inner ring temperature difference of the inner pipe is larger than a preset difference value, the target coil temperature is larger than or equal to a preset limit value, the coil heating rate is larger than a preset rate, and the compressor operating frequency is larger than a preset frequency, determining that the filter screen is blocked; when the frequency limiting highest frequency of the air conditioner is larger than or equal to a preset frequency threshold value, the preset frequency is a first frequency; the frequency limiting highest frequency is the maximum value of frequency limiting frequencies corresponding to the air conditioner at each outdoor environment temperature; when the frequency-limited highest frequency is smaller than the preset frequency threshold, the preset frequency is a second frequency; wherein the second frequency is less than the first frequency;
The step of determining the inner pipe inner ring temperature difference and the coil heating rate based on the indoor environment temperature and the coil temperature comprises the following steps: acquiring indoor environment temperature and coil temperature when a compressor is started for a first preset time period, and calculating a difference value between the coil temperature and the indoor environment temperature to obtain an inner-tube inner-ring temperature difference; acquiring the initial coil temperature when the compressor is started and the maximum coil temperature within a second preset time period when the compressor is started; acquiring acquisition time corresponding to the maximum coil temperature, and determining the coil heating rate based on the initial coil temperature, the maximum coil temperature and the acquisition time;
the dirty blockage judging method of the air conditioner filter screen further comprises the following steps: when the filter screen is dirty and blocked, acquiring the current outdoor environment temperature and the frequency limiting frequency corresponding to the outdoor environment temperature; acquiring the current operating frequency of a compressor, setting the frequency-increasing rate of the compressor to be a first rate when the current operating frequency is smaller than or equal to a preset target frequency, and enabling the operating frequency of the compressor to be always smaller than the preset target frequency; wherein the preset target frequency is related to the frequency limiting frequency, and the preset target frequency is smaller than the frequency limiting frequency; and when the current running frequency is greater than the preset target frequency, controlling the compressor to perform frequency reduction at a second rate until the current running frequency is reduced to the preset target frequency.
2. The method for judging filth blockage of an air conditioner filter screen according to claim 1, wherein the first preset time period is determined based on a current indoor environment temperature: if the current indoor environment temperature is greater than or equal to a preset temperature, the first preset duration takes a value of X; if the current indoor environment temperature is smaller than the preset temperature, the first preset duration takes a value of Y; wherein Y > X.
3. The air conditioner filter screen filth blockage judging method as set forth in claim 1, further comprising:
when the filter screen is dirty and blocked, a filter screen dirty and blocked prompt is sent out to prompt a user to clean the filter screen;
when the filter screen is detected to be detached and reinstalled, the accumulated running duration of the indoor fan is controlled to be cleared.
4. Dirty stifled judgement device of air conditioner filter screen, its characterized in that includes:
the first judging module is used for judging whether the air conditioner is in a heating mode or not and the cold air prevention mode is in a closed state when the accumulated running time of the indoor fan reaches a preset time;
the determining module is used for acquiring indoor environment temperature, coil temperature and compressor operating frequency when the air conditioner is in a heating mode and the cold air prevention mode is in a closed state, and determining inner pipe inner ring temperature difference and coil heating rate based on the indoor environment temperature and the coil temperature;
The second judging module is used for judging whether the filter screen is blocked or not based on the inner ring temperature difference of the inner pipe, the coil heating rate and the compressor running frequency;
the second judging module is used for obtaining the maximum value of the coil temperature in the first preset time period when the compressor is started to obtain the target coil temperature; when the inner ring temperature difference of the inner pipe is larger than a preset difference value, the target coil temperature is larger than or equal to a preset limit value, the coil heating rate is larger than a preset rate, and the compressor operating frequency is larger than a preset frequency, determining that the filter screen is blocked; when the frequency limiting highest frequency of the air conditioner is larger than or equal to a preset frequency threshold value, the preset frequency is a first frequency; the frequency limiting highest frequency is the maximum value of frequency limiting frequencies corresponding to the air conditioner at each outdoor environment temperature; when the frequency-limited highest frequency is smaller than the preset frequency threshold, the preset frequency is a second frequency; wherein the second frequency is less than the first frequency;
the determining module is used for obtaining the indoor environment temperature and the coil temperature when the compressor is started for a first preset time period, calculating the difference value between the coil temperature and the indoor environment temperature, and obtaining the inner pipe inner ring temperature difference; acquiring the initial coil temperature when the compressor is started and the maximum coil temperature within a second preset time period when the compressor is started; acquiring acquisition time corresponding to the maximum coil temperature, and determining the coil heating rate based on the initial coil temperature, the maximum coil temperature and the acquisition time;
The second control module is used for acquiring the current outdoor environment temperature and the frequency limiting frequency corresponding to the outdoor environment temperature when the filter screen is blocked; acquiring the current operating frequency of a compressor, setting the frequency-increasing rate of the compressor to be a first rate when the current operating frequency is smaller than or equal to a preset target frequency, and enabling the operating frequency of the compressor to be always smaller than the preset target frequency; wherein the preset target frequency is related to the frequency limiting frequency, and the preset target frequency is smaller than the frequency limiting frequency; and when the current running frequency is greater than the preset target frequency, controlling the compressor to perform frequency reduction at a second rate until the current running frequency is reduced to the preset target frequency.
5. An air conditioner comprising a computer readable storage medium storing a computer program and a processor, the computer program implementing the method of any one of claims 1-3 when read and run by the processor.
6. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when read and run by a processor, implements the method according to any of claims 1-3.
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